Untitled record

Epoxysiloxane paint repels pollutants and is self-cleaning

De-Polluting and Self-Cleaning Epoxy Siloxane Coating

Full description

Background of the invention

Current technology relates to photo catalytic coatings on a substrate and to formulations for transferring the coating onto the substrate surface. Specifically, the technology is most related to self-cleaning de-polluting coatings and coating compositions that include titanium dioxide particles and epoxy siloxane.

Photo catalytic properties of titanium dioxide result from allowing electrons from the valence line to the conduction line under the influence of ultraviolet (UV) radiation and near-UV radiation. Reactive electron-hole pairs that produce or are formed migrate to the surface of titanium dioxide particles, where the holes oxidize and adsorbed water, which is absorbed to produce reactive hydroxyl radicals, and electrons reduce oxygen, which is adsorbed to produce super radicals. oxidized surface.

Each of them can break down into NO3 and volatile organic compounds (VOCS) in the air. Given these properties, photocatalytic titanium dioxide has been used in coatings and the like to remove pollutants from the air. These coatings may also have the advantage of being self-cleaning as soil, grease, mildew, fungi, algae are also oxidized on the surface.

Coatings containing photo catalytic titanium dioxide can be made using many different types of materials or resin systems. Typically, photo catalytic coatings are prepared with materials that aid in bonding (polysiloxane) due to stability. Excellent polysiloxane polymers for oxidative conditions.

Stabilizer systems and resins composed of carbon, hydrogen, and oxygen undergo photo oxidation to produce water, carbon dioxide, and, if nitrogen is present, nitrogen-containing species in the presence of UV light.

Although coating compositions containing siloxane type polymers provide excellent durability, the cost of siloxane type polymers is significantly higher than the cost of other organic polymers such as acrylic or styrene polymers. The use of mixtures of siloxane polymers with organic polymers in coating compositions improves the loading strength of corresponding coatings on organic polymer-based compounds only, but still causes a continuous decrease in loading strength as the concentration of siloxane polymer decreases. Accordingly, it is difficult to have coatings that have high levels of photocatalyst because the catalyst tends to oxidize. oxidized and breaks the polymeric binder for the coating.

This problem increases when the coating is exposed to intense ultraviolet rays from direct sunlight, as is the case with exterior coatings.

Top coat paints based on epoxy siloxane polymers are well known and provide coatings with excellent corrosion resistance for any epoxy coating with weather ability to withstand polyurethane in one coating, where an epoxy siloxane polymer is produced from the reaction Epoxy resin and the cross-linking component are exactly a two-component system that must be installed before using or applying the paint.

These types of coatings have a wide range of use in marine and industrial settings or applications where durability and corrosion resistance are important and critical. For example, epoxy siloxane-based coatings are used on structural steel, the exterior of tanks, pipes, and the like. In addition, epoxy siloxane coatings do not contain isocyanate residues, which pose safety risks to the people who use the paint. The use of epoxy siloxanes in combination or in combination with inorganic zinc silicate primers allows the use of one layer of paint. Epoxy siloxane coating instead of one of the epoxy-based coatings and another urethane coating. The ability to obtain high-quality paint in one coat gives a distinctive economic cost and reduces preparation time.

General description of the invention

Therefore, the goal of the present invention is to provide durable photo catalytic coatings capable of endurance, especially paint coatings and coating compositions, which include titanium dioxide photo catalysts, which have the ability to remove colorants from the air and self-clean.

A specific goal of the invention is to provide durable coatings, including photocatalytic titanium dioxide and epoxy siloxane, which helps with cohesion and has the ability to remove pollutants from the air and self-clean.

International Patent Publication Nos. 83014/2005 and 030250/2006-083013/2005 of Goodwin et al., all included here in the full references, describe cleaning coatings compositions that remove contaminants including photo catalytic TIO2.

U.S. Patent No. 4,250,074 by Foscante et al, which is included here in references in its entirety, describes coatings incorporating a penetrating polymer network of polymerized epoxy resin that are combined with a polysiloxane polymer. The epoxy resin is cured with amine curing agents. amine curing or with aminosilane.

US Patent No. 5,618,860* 5,804,616 by Mowrer et al, which is included in the entire reference, describes coating compositions based on epoxy siloxane. The composition is prepared by combining a mixture of aromatic epoxy resin with polysiloxane. Organooxysilane, amine hardener or aminosilane, catalyst and pigment group.

U.S. Patent No. 7,026,398 by Monkiewicz et al, which includes all net references, describes an air-drying coating composition that includes at least one epoxy resin, at least one acrylic resin, at least one acrylic monomer, and at least one copolymer based on Containing an acrylic monomer or epoxy monomer, optionally a silicic ester and/or alkyl silicate, at least one aminoalkylsilane Optionally, a single organosilane or a mixture of organosilanes.

US Patent No. 7,160,962, which is incorporated herein in its entirety by Sakugawa, describes modified epoxy polysiloxane rubber compositions. The compositions are prepared by combining silicone with epoxy resin, an elastomeric resinous intermediate with many functions and optionally a catalyst for dyes and other manufacturing materials.

The preceding discussion is presented individually in order to give a better understanding of the nature of the problems that exist in the field and should not be construed in any way as an acceptance or permission of the previous field. Any reference here is placed as an acceptance since this reference represents the “previous field” of the current application.

Available here are self-cleaning photo catalytic coatings and paint formulations that include photo catalytic titanium dioxide and a bonding agent that includes an epoxy-functional silicon compound and an amino-functional compound. The compositions provide durable photo catalytic coatings that are durable when applied to a substrate and that effectively decompose NO2 compounds in the environment when exposed to light. Coating compositions may also include one or more pigments, such as pigmentary titanium dioxide or its like, and one or more alkaline modifiers.

Surprisingly, it was found that coating compositions containing TIO2 photo catalytic properties and epoxy siloxane, which helps with bonding, with a total pigment volume of less than 50%, give the coating strength and durability, which effectively removes NOX compounds from the environment. In one embodiment the total formula volume concentration of the coating compositions is between about 5% and about 70% by volume of the dry coating PVC.

In one embodiment the amino-functional compound is an amino-functional silicon compound such as aminosilanes or something similar. In another embodiment, the epoxy-functional silicon compound is an epoxy siloxane polymer. In another embodiment, the epoxy-functional silicon compound is epoxy silane. In some embodiments the composition includes epoxy-functional silicon compounds which include one or more end groups, the composition may also include a polysiloxane polymer or a silane compound.

In some embodiments the composition includes titanium dioxide pigment as well as photo catalytic titanium dioxide. Exactly, photo catalytic titanium dioxide is in crystalline form.

In one embodiment the photo catalytic titanium dioxide is greater than about 95% in crystalline form.

In some embodiments the total pigment volume concentration of the composition is about 10% to 50% by volume of the dry coating PVC.

In other embodiments, the total dye volume concentration is about 10% to about 40%, about 15% to about 35%, about 15 to 30%, and about 20 to 35%.

In other embodiments the volume concentration of the total formula is about 20% to about 30% by volume.

In one embodiment the coating composition includes approximately 1%: 10% photo catalytic titanium dioxide by volume PVC.

In other embodiments the composition includes about 1% to 5% or about 1:3% by volume photo catalytic titanium dioxide.

In a specified embodiment the coating composition includes from about 10% to 5% photo catalytic titanium dioxide and has a total pigment volume for the composition of from about 10% to about 40% PVC.

In another embodiment the composition includes about 1%:5% photo catalytic titanium dioxide PVC and has a total pigment volume for the composition of about 20:35% PVC.

In various embodiments the modifier in the compositions is calcium carbonate although it is obvious to one skilled in the art that alternative modifiers or mixtures of modifiers are also useful in innovative coating compositions.

These and other directions of the present invention will be better understood by reference to the following detailed description and accompanying figures.

Brief explanation of the drawings

Figure No. (1): shows the non-removal ability of coatings containing the bonding material epoxy siloxane with total pigment volume concentrations from 30% to 70% with 7.5% photo catalyst.

Figure No. (2): shows the non-removal activity of coatings containing epoxy siloxane, the material that helps bond to PVC, total 20: 35% and 0 1- 2.5 5% of photo catalytic TIO2.

Figure No. (3): shows the non-removal activity of coatings containing epoxy siloxane, the material that helps adhere to PVC, between 18% and 0 to 6% of the photocatalyst.

Figure No. (4): shows the non-removal activity of coatings containing epoxy siloxane with 30: 70% PVC and 7.5% photo catalyst.

Figure No. (5): shows the non-removal activity of coatings containing epoxy siloxane, the material that helps bond with 2: 35% total PVC, zero, and 1% photo catalyst.

Figure No. (6): shows the non-removal activity of coatings containing epoxy siloxane, the material that helps bonding. 20: 35% total, zero, and 2.5% photo catalyst.

Figure No. (7): shows the non-removal activity of coatings containing epoxy siloxane from 20: 35% total PVC and zero and 5% photo catalyst.

Figure No. (8): shows the calculated half-life of 15 mm thick coatings as a factor of the total PVC level and the photo catalyst in changing weather conditions.

Figure No. (9): shows the change in B* as a factor for the level of the photocatalyst, which indicates the self-cleaning condition of the photocatalytic coatings containing the epoxy siloxane binder.

Figure No. (10): shows the endurance capacity of photo catalytic coatings, including an epoxy siloxane binder and two types of natural TiO2.

Detailed description

The present invention provides self-cleaning coatings that remove contaminants and a coating composition that includes photo catalytic titanium dioxide and an epoxy-functional siloxane binder.

Coating compositions produce coatings when applied to a material that offers excellent first-class durability while exhibiting excellent first-class gloss, transparency, and the ability to remove NOX from the environment and side tracers or neutralize acidic rings from photo catalytic oxidation of NOX materials. Invented compositions also typically include manufacturers such as TIO2 dye grade and modifiers such as calcium carbonate.

Definitions:

All terms presented here have the usual meaning unless stated in another given way.

All references to "% by weight" here relate to the % by weight of the total paint composition including the solvent, in preference to dry coating, unless stated in another specific way as used here by the term "% by volume" or the volume concentration of pigments (PVC). Refers to the % by volume of the dry coating or paint unless otherwise specified. The components of the dry coating or paint used for the value given “% by volume” include the TIO2 photo catalytic pigment modifier and the polymer.

The term NOX refers to the types of NO, nitrogen oxide, and NOX, either combined or individual.

The term “modified” is intended to have a familiar and opposite meaning in the field. As used herein, the term "modifier" refers to an inorganic amino substance or mixture of inorganic amino substances that has a refractive index similar to that of the coating medium and the coating, such that it would normally be transparent in the coating medium. Coating the outer layer under a volume concentration of pigments comes out but It has the advantage of opacity, although less than TIO2, above the critical pigment volume concentration. Modified materials are typically less expensive than pigments including TIO2 and allow some pigment to be replaced in specific locations.

The term "critical pigment volume concentration (CPVC)" has a meaning familiar to the art, such as the point at which there is sufficient polymer present to wet the pigment particles or give contact to pigment particles or fragments and polymer. Below CPVC there is sufficient polymer to wet the pigment and above CPVC there is none. .

The term “aliphatic” has the usual meaning in the art and includes, without limitation, straight-chain, branched-chain or cyclic hydrocarbons that are fully saturated or that contain one or more unsaturated units but that are not aromatic. Non-specific examples of aliphatic groups include saturated cyclic alkyl, unsaturated alkyl, or alkenyl groups, and spellings from that source such as alkyl, cycloalkylalkyl, or cycloalkylalkenyl. .

The term “alkyl” means the familiar metal and includes a primary, secondary, tertiary hydrocarbon, or tertiary, straight, branched, or cyclic hydrocarbon.

The term "aryl" is intended in the usual sense in the field and includes a monocyclic carbon ring(s), and a stable bicyclic or tricyclic carbon ring (s), in which at least one ring is aromatic, as known by Hückel's rule 4 n + 2. These include phenyl, biphenyl, and naphthyl.

The term heteroaryl is intended in its usual sense and includes an aromatic ring that includes at least one sulfur mo, oxygen, nitrogen, or phosphorus atom in the aromatic ring.

The term "aralkyl", unless stated in a specific way, refers to an aryl group, such as the one defined above, attached to the part through the alkyl group, such as the one defined above.

The term "alkaryl", unless mentioned in a specific way, refers to an alkyl group, such as the highest known, linked to a molecule through an aryl group, such as the highest known.

The term “polysiloxane” is intended to have the standard meaning in the field and includes a polymeric example including a plurality of diorganosiloxane units.

The term “epoxy-functional compound” as used herein means any compound that includes at least one epoxy group and typically two or more epoxy groups including epoxy-functional silicon compounds.

In addition to epoxy-functional compounds of non-silicon origin, such as those traditionally used in epoxy coating compositions.

The term “amino-functional compound” as used herein means any compound that contains at least one amino group capable of reacting with epoxy groups to form an open-ring product included in the compound.

Amino-functional silicon compounds, in addition to amino-functional compounds of non-silicon origin such as organic and inorganic amino compounds.

The term “epoxy-functional silicon compound” as defined here means a silicon compound, such as a silane compound, siloxane, or polysiloxane, that has at least one epoxy group.

Illustrative examples of functional epoxy silicone compounds are polysiloxane, functional epoxy, and epoxy silane.

The term “epoxy-functional polysiloxane” as used here is intended to have the commercial meaning known in the art and include a linear or branched polymeric component that has one or more polysiloxane chains and has at least one group. Single functional epoxy groups, including two or more epoxy groups.

The term “epoxy-functional polysiloxane” as used here is intended to have an opposite meaning or one known in the art and include a branched or linear polysiloxane that has one or more siloxane chains that contain at least one epoxy group. Single functional groups including two or more epoxy groups.

Unless otherwise stated, the reference to a specific component percentage in the compositions of the paint of the invention or patented coatings refers to the percentage of the component in the dry coating by the size of the PVC. It is estimated that the components of the dried coating that are made to calculate the percentage are photo catalytic TIO2.

Coatings The top layer based on epoxy siloxane polymers is well known and provides excellent corrosion resistance to epoxy coatings with the weather tolerance of polyurethane in one coating. Epoxy siloxane systems that help with cohesion and binding are organic solvents that are diluted with various organic solvents, including aromatic and non-aromatic solvents such as alkyl acetates and the like. Cross-linked epoxy siloxane polymer is produced by the reaction of an epoxy-functional silicon compound and a cross-linked component. This is why epoxy siloxane binders are exactly a two-component system that must be combined or installed before using the paint.

A great benefit of using coatings based on epoxy siloxane is the saving of expenses resulting from using one coating instead of two separate layers of an epoxy-based coating and another of polyurethane-based coatings.

Coating compositions that include a solvent-based epoxy siloxane binder are produced at a PVC formula volume concentration of about 15% to about 20% in order to produce coatings with good gloss and impermeability.

Although it is acknowledged that this level of PVC in the coating composition would not be suitable for contaminant-removing and photoactive formulations including photo catalytic TIO2 due to the high level of binder which would be entirely imparted to the photocatalytic TIO2 particles.

In contrast, PVC in photocatalytic coating formulations containing TIOW must be exactly greater than 50% in order to give sufficient photocatalytic activity.

It has now been discovered that compounds or compositions that include photo catalytic TIO2 and an epoxy siloxane bond with PVC of 15:40% give durable photo catalytic coatings with excellent gloss and impermeability, which give the ability to work and photo catalytic activity. .

The compounds of the invention include:

1- Photo catalytic titanium dioxide.

2- Epoxy siloxane binder

The compositions will also include one or more pigments or impermeable materials such as summer grade titanium dioxide and one or more modifiers.

Photocatalytic coating compositions may also include fish fibres, dispensers and stabilizers.

And also other components used in coating compositions known to those skilled in the field.

In some embodiments one or more additional bonds may be included in the coating compositions.

Any form of titanium dioxide may be used in the coating compositions of the invention, including the form or form of rutile or anatase. Additionally mixtures of titanium dioxide, rutile or anatase may be used. The photocatalytic coating compositions of the invention include photocatalytic titanium dioxide TiO2 particles which have the ability to form electronhole pairs in the presence of electromagnetic radiation, especially near-UV and/or visible light. photoactivity.

It is preferable that photo catalytic titanium dioxide has the ability to have actual photo activity in the presence of visible light.

Photo catalytic titanium dioxide for use in coating compositions is preferred and prevalent to be in the form of anatase crystalline due to its higher photo activity than the rutile form.

“Prevalently” means that the level of anatase in the titanium dioxide particles in the paint is higher than 50% by weight.

Although it is preferable for the anatase level to be greater than 80%, it is more preferable to have an anatase level greater than 90% or 95%.

In some embodiments the photocatalytic titanium dioxide particles of the compositions will be in the form of virtually pure anatase in the sense that the rutile crystalline content is less than about 5% - more specifically less than about 2.5%.

Preferably less than about 1% by weight.

In some embodiments, the photocatalytic titanium dioxide particles will be devoid of the rutile image, meaning that the rutile crystal image cannot be detected by crystallography.

Put another way, photocatalytic titanium dioxide particles may include 100% anatase. The degree of crystallization and the nature of the crystalline phase are measured by X-ray diffraction.

In other embodiments the photocatalytic rutile titanium dioxide may be used as the sole source of the photocatalytic titanium dioxide or in combination with the photocatalytic titanium dioxide anatase.

Photocatalytic titanium dioxide particles for use in paint formulations will have a particle size rate at which the particles can absorb and scatter ultraviolet light. When the particle size becomes very small, the line gap and band gap between the valence and conduction lines decreases.

Therefore, with a sufficiently small particle size, it has been observed that titanium dioxide particles have the ability to absorb light in the visible spectrum.

The titanium dioxide particles contained in the paints of the invention will have particle sizes between about 1 nanometer and about 150 nanometers.

In some embodiments the particle size of the photocatalytic titanium dioxide particles will be between 5 nm and about 20 nm and 25-30-40 nm.

In a preferred embodiment the particle size of the titanium dioxide particle in the paint will be between about 5 nanometers and about 15 nanometers. It is more preferable between about 5 and 10 nm.

Reference here to the size of titanium dioxide particles, or crystals, will be understood to mean up to the particle size of titanium dioxide particles, where the particle size is centered or modified by the term “about” will be understood to include smaller or larger particle sizes. From the mentioned size to calculate the necessary experimental errors. In measurement and diversity between different methods for measuring particle size, as will be clear to a person skilled in the field. Errors can be measured by, for example, transmission electron microscopy, TEM, and also XRD.

Alternatively, particles may be characterized by surface area. Exactly the photo catalyst, powdered titanium dioxide will have a surface area as measured by any suitable method including 5 BET points greater than about 20 m2/g. Specifically, most photocatalytic titanium dioxide particles have a surface area greater than about 50 m2/g or greater than about 70 m2/g.

In the most preferred embodiments, titanium dioxide particles have surface areas greater than about 100 m2/g and preferably greater than about 150 m2/g.

In some embodiments the photocatalytic titanium dioxide particles will have a surface area greater than about 200 m2/g, greater than about 250 m2/g, or even greater than about 30 m2/g.

Photo catalytic titanium dioxide is available from inorganic amino chemicals under the designs N300SP, 300 PCS, 105 PC, PC50, and 500 PC which are specifically found to be contained in coating compositions according to the invention.

N300 SP, 300 PCS are 100% anatase titanium dioxide dispersions in water. They have a crystallization size ranging between about 5 nanometers and about 10 nanometers.

500 PC is 100% anatase titanium dioxide powder, which has a TIO2 content between about 82% and 86% by weight, which has a surface area of ​​about 250:82%, and about 86% by weight, which has a surface area of ​​about 250:350. m2/g as measured by the 5-point RET, which translates the average particle size from about 5 nm to 10 nm.

The product designed as 105 PC, 50 PC is also from Millennium Inorganic Chemicals will also find use.

In some embodiments of the invention 50PC comprises more than 97% by weight of titanium dioxide and 105PC comprises more than 95% by weight of titanium dioxide.

The solid form of TIO2 for each of the 100 PC and 50 PC products is 100% anatase and the surface area is between about 45 m2/g and about 55 m2/g and between about 80 and 100 m2/g, respectively.

Of course, other suitable sources of titanium dioxide will be prepared by any method known in the art. For example, the processes described in US Patent No. 4,012,338, which are included throughout the references, may be used to prepare photocatalytic tit anium dioxide used in Composition of the coatings of the invention.

The coating compositions of the invention will comprise exactly about 1:20% photo catalytic titanium dioxide by volume of the dry coating PVC composition.

Exactly most compositions will include between about 1:15% photo catalytic titanium dioxide by volume of the dry compound or about 1:10% - preferably about 1:5% or 1:3% by volume in an embodiment. One embodiment.

The coating compositions of the invention include about 2.5 to 5% photo catalytic titanium dioxide by volume of the dry coating composition.

In another embodiment the coating compositions comprise 5:7.5% of PVC photo catalytic titanium dioxide.

The previous quantities of photo catalytic titanium dioxide represent the size of the photocatalytic titanium dioxide in the dry coating composition, taking into account the photocatalytic photocatalyst, only the pigment, the modifier, and the substance that helps with cohesion and the binder.

Within the scope of the invention, coating compositions may be given that have two or more titanium dioxide photocatalysts, where at least one, and preferably all, of the titanium dioxide photocatalyst materials meet the assignments previously described above.

Then, for example, the invention includes the use of photocatalytic titanium dioxide and the pigment formed by combining two different titanium dioxide powders or solutions, in which at least and preferably both have a particle size and/or surface area as Previously defined.

In other embodiments the photocatalyst will consist primarily of the specific titanium dioxide described herein by which it is meant that any pure photocatalyst having different material activities is excluded or that chemistries of additional photocatalyst physically affect Working capacity, contaminant removal or cleaning properties of the coating are excluded.

The link will also include the curing material component, and the curing material includes a nucleophilic group that has the ability to react with the epoxy functional groups to form an open-ring product.

Mixtures of two or more epoxy-functional silicon compounds and two or more curing materials are also included by the invention.

Epoxysiloxane resins are known in the art and any suitable epoxysiloxane resin may be used in invented compositions and various commercially available epoxysiloxane resin systems may be used with the present invention, for example commercially available epoxy-siloxane resin systems are sold By Djosa under the brand name SILIKOPON EW EF, a siloxane resin containing cyclohexanol SILIKOPON EF (siloxane resin). Comprising cyclohexanol: 4,4-(1-methylethylidene)bis polymer with (chloromethyl)oxyrane and SILIKOFTAL ED. Other commercially available epoxysiloxane resins that are useful with the present invention include SLM 43226 sold by Wacker ES 1002T and ES 1001T modified epoxy resin sold by Semi-Atsu. Of course, other types of epoxy-siloxane resin systems that were previously formulated may be used, or epoxysiloxane resins may be prepared using methods known in the field.

In another embodiment of the invention an epoxy siloxane binder may be prepared from one or more epoxy-containing compounds and one or more amino-containing compounds, namely epoxy-functional compounds including epoxy-functional silicon compounds such as Polysiloxane, epoxy-functional epoxy and/or epoxy-functional silicon. Amino-functional compounds include amino-functional silanes such as amino-functional polysiloxanes and/or amino-functional silanes.

In one embodiment the epoxy-functional compounds include one or more epoxy-functional silicon compounds and the amino-functional compounds include one or more amino-functional silanes.

In one embodiment the epoxy-functional silicon compound is an epoxy-functional polysiloxane. Epoxy groups may be introduced into polysiloxane by means of epoxy silane or by means of epoxy resin. As described in European Patent Application 1086974, which is included herein in its entirety. In one embodiment the epoxy resin is a polymer between 4,4-(1-methylethylidene)bis-4,4-(1-methylethylidene)cyclohexanol and chloromethyloxirane. In one embodiment, the epoxy-functional polysiloxane is prepared by reaction between an epoxy resin and a reactive polysiloxane. In another example, functional epoxy polysiloxane may be prepared by exposing an epoxysilane and alkoxysilane mixture to the partial solution and concentration. It must be understood that epoxy-functional polysiloxane may distinctively include alkoxy and/or hydroxyl-functionalities.

Although not required, it is believed to be preferable to use at least one epoxy-functional polysiloxane in which the polysiloxane backbone or side chains of the polysiloxane backbone include OH groups, or alkoxy groups. Without being linked to any specific theory, it is believed that hydroxy groups or alkoxy groups may participate in the curing of binder coating formulations after exposure to humid environments.

In embodiment, the last epoxy-functional silicon compound is epoxy silane.

In some embodiments, epoxysilanes have the formula:

A-SI(R)A(OR) (3-4)

Where:

A: It is an epoxide-substituted monovalent hydrocarbon radical and

R: Independently, you choose from the alkyl, including but not limited to, such as ethyl, ethyl, hexyl, octal, alkoxy, octal, aryl, including phenyl aryl, aralkyl, and alkylaryl.

A: It is 0 or 1.

Group A in Epoxysilane is a replacement group, Glycidoxy-Substitted Alkyl Group, for example 3- Glydidox Propelille 3-glycidoxypropyl Apoxy Silane Sillan 3-glycidoxypropytrimethoxysilane 3- Glycedoxubil And three ethoxysilane, 3-glycidoxypropyltriethoxysilane, and 3-glycidoxypropyldiethoxymethoxysilane, and 2 glycidoxysilane. Propyl 2-glycidoxypropyl trimethoxysilane and 3-(4,3-epoxycyclohexyl)propyltrimethoxysilane 3-(3,4-epoxycyclohexyl)propyltrimethoxysilane and 2-(4,3-epoxy-4-methylcyclohexyl)ethyltrimethoxysilane 2 -(3,4-epoxy-4-methyl-cyclohexyl)-ethyltrimethoxysilane 6.5- Epoxyhexyltriethoxysilane 5,6-epoxy-hexyltriethoxysilane.

Commercially available epoxy silanes are 6,5-epoxy-hexyltriethoxysilane (ABCR BH G KG Germany).

3- Glycidoxypropyl methyldiethoxysilane GMBH ABCR Company KG 3-glycidoxypropyl methyldiethoxysilane (ABCR GmbH & Co. KG) Germany Germany lymo, Sivento Chemie GmbH, Germany).

In other embodiments, the epoxy-functional silicon compound is combined with one or more siloxane polymers and silicon compounds.

Of course, mixtures between different epoxy-functional silicon compounds may also be used in formulations.

In other embodiments, an epoxy-functional silicon compound is an employee union of one or more epoxy-functional polysiloxanes and one or more epoxy silanes.

For example, a ligament connector may include one or more epoxy-functional polysiloxanes as well as one or more epoxy silanes.

This recombinant may be prepared by adding epoxy-functional polysiloxanes as described above and epoxy silane as described or by using the reaction product between the epoxy-polysiloxanes in which a portion of the unreacted epoxy silane residue is present. .

In another embodiment the epoxy siloxane binders used in the inventive coating compositions are prepared by adding the curing component to a mixture including the functional compound.

An epoxy or resin and a silicon-functional compound or resin as described above. The cured material will typically include a nucleophilic group that will be able to react with the epoxide groups in the epoxy resin component to form open-ring species and typically affect some Degree of Hebrew association process.

Epoxy resins are well known in the art. Any suitable epoxy resin containing at least one 1,2-epoxy group that is subject to reaction with a nucleophile to form an open-ring species may be used in the present invention.

The epoxy contains materials that may be aliphatic, cycloaliphatic, aromatic or the like, in another embodiment of which the epoxy resin includes two or more epoxide groups that are capable of reacting with a nucleophilic prior to forming ring-opened products.

Epoxides include compounds and polymers that have epoxy end groups, such as diglycidyl ethers, polyalkylene glycol, and the like. Epoxy groups and polymers have internal epoxide units, such as polybutadiene and polyepoxides. In one embodiment the epoxy resin is a polymer containing 4,4-(1-ethylenecyclohexanol bis-4,4-(1-methylethylidene)cyclohexanol with chloromethyloxirane. Furthermore, a mixture of epoxy-containing materials may also It can be used as a silicone epoxy coated messenger.

Examples of suitable epoxy containing materials include but are not limited to:

Epoxy resin type bisphenol A.

A compound resin containing a heterocyclic ring, such as triglycidyl isocyanate and hydantoin epoxy.

Epoxy resins that are aromatic or aliphatic, such as epoxy resin, type bisphenol A, hydrogenated, propylene glycol, glycol-diglycidyl ether copolymer, pentaerythrinol, polyglyceryl ether copolymer. Epoxy resin, which we obtain with the active agent alicyclic carboxylic acid, aromatic or aliphatic, and epichlorohydrin.

Epoxy resin containing a twisted ring.

Epoxy resin type glydidyl ether, which is a reaction product of the compound ortho-allylphenol novolac with epichlorohydrin, and epoxy resin type glycidyl ether, which is a reaction product of diallylbisphenol, which has diallylbisphenol groups. The allyl groups standing at the ortho sites are converted to hydroxyl groups of bisphenol A with epichlorohydrin.

In addition, derivatives such as ethylene oxide, propylene oxide, styrene oxide, cyclohexene oxide and phenyl glycidyl ether may be used as required. These epoxy resins may be used individually or in the form of a mixture. At least two types of epoxy resins.

The polysiloxane or silane component may be any polysiloxane or alkoxysilane known in the field that is capable of reacting with epoxy resin in the presence of the curing agent. In some embodiments the coating compositions include a mono-, di-tri or tetraalkoxysilane including tetramethylsilane or tetraethylsilane.

The component of the processing material may be a compound that includes at least one group capable of reacting with an apoxy group to form a nucleophilic open-ring product. In one embodiment the processing material includes oxygen or a sulfur nucleophile including hydroxyl and thiol groups and their salts. In another embodiment of the invention the processing component includes one or more amine nucleophiles including aliphatic amines, diamines, aromatic amines, hydrazines, hydrazides, hydroxylamines, alkyelendiamines, and Munch bases Mannich basics. Amino acids and the like. The addition of the curing material will begin to harden the resin by the reaction of the epoxide groups in the epoxide siloxane resin, which will cause the extent of cross-linking of the resin to display.

The curing material will typically be a mixture with other components to form a photo-catalytic coating that has been prepared for application or use.

In addition, the catalyst may optionally be included with the curing material or with an epoxy siloxane resin component to aid the curing reaction. An appropriate catalyst that increases the reaction rate for open reactions. Epoxy creation. Knowledge in the art may be used.

In other embodiments, the curing material includes a typical curing material for epoxy coating compositions. Examples of commercially available curing materials include, but are not limited to, polyamines (arylyl) or aryl polyamines, Epoxy Hardener MXDA sold, epoxy hardener sold by Epoxy Hardener MXDA sold by the Gas Company. Mitsubishi Chemical Company Inc USA.

Aliphatic polyamines (aliphatic) DETA, DEAPA sold by BASF Germany. Aradur (cycloaliphatic) polyamines: Aradur BD42 sold by the materials provided is Tittmann Switzerland.

Formulated amines: Sunmide N 230-3 sold by Sunmide 3-230N sold by Sanwa Chemical Company Inc USA, Ancamide Knowledge Huntsman Switzerland Huntsman Advanced Materials Switzerland.

Polyamine adducts: Aradur 2964 CH, Aradur 2969 CH, Aradur 863 Ancamine 1734 or Ancamine 1735 or Ancamine 2134 which is sold by ISO PL Products USA Polyaminoamides: Sunmide 300- 60 LH or Sunmide 305- 70 Ancamine 2353, which is sold by Arador Products Plc, USA, and Polyamide adducts 460 j 90 bd, which is sold by Huntsman Advanced Materials Switzerland, rules. Mannich bases. Ancamine MCA or Ancamine 1856 or Ancamine K 54 which is sold by Ayo Products PLC USA, Polypox VH 55/40311 or Polypox VH 4294 which is sold by HLF Prummer Polymer Chemie Germany and Arad ur 16 BD or Aradur 3441 90 sold by Huntsman Advanced Materials Switzerland.

In one embodiment of the invention the processing material is an amino polysiloxane, typically amino polysiloxanes, including a linear or branched polymeric component having one or more polysiloxane chains having at least one amino group.

In some embodiments the amino functions may be introduced into the reacted polysiloxane by means of an aminosilane, i.e. an aminosilane which is particularly included by references in their entirety.

It is also implied that an amino-functional polysiloxane may be prepared in place in some embodiments, and a functional alkoxy or functional hydroxyl polysiloxane may be reacted with an aminosilane in which the amino functions are inserted, for example an amino may be Reacted with dimethylsiloxane to produce amino polysiloxane.

In at least one embodiment the amino functional polysiloxane is the reaction product of polysiloxane and aminosilane.

In one embodiment the amino polysiloxane is a diamino-functional polysiloxane W, X such as polysiloxane liquids.

Non-specific examples of commercially available diamino-functional polysiloxanes are SILRES HP 2000 (amino-functionalised methyl-phenyl silicone) sold by Wakir 17 SF amino functionalised polysiloxane fluid sold Wacker; SF1708 sold by General Electric Company.

Although this is generally not required, it is more complicated than it is to use at least one amino-functional polysiloxane in which the polysiloxane moiety or side chains to the polysiloxane moiety include OH groups or alkoxy groups without being linked to any molecular theory. It is believed that hydroxy or alkoxy groups may participate in the treatment to form a neutral coating even if it is exposed to humid environments.

In another embodiment, the processing material includes an aminosilane, i.e., an aminosilane capable of reacting with an epoxide group on an epoxy siloxane resin to form an open-ring product that may be used in the present invention. Amino silanes may include a variety of compounds in which at least a primary or secondary amine is attached to a silicon atom by a variety of linking groups, including alkylene groups, alkyleneoxide groups, arylene groups, and cycloalkyl groups, or recombinant from that source. . The amine functional groups may be replaced by branched or branched alkyl groups and aryl groups, or they may be part of a heterocyclic ring.

In one embodiment the invented coating compositions include an aminosilane or an aminosilane, the general formula is:

R2N[(CH2)xRN]n-CR(3-n)(CH2)ySiR1m(R2)(3-m)

Where each R group is an independent hydrogen, or a linear, branched alkyl group, or a branched or cyclic alkyl group, or an amino alkyl group of the form R2N (CH2)X.

R1: The alkyl group is linear, cyclic, or branched alkyl.

R2: It is an alkoxy group or an acetoxy group.

X: is an integer from 1 to 10.

Y: It is an integer from 1 to 16.

N: is zero -1- 2- 3.

M: be zero 1 2.

In various embodiments amino silane may be:

3 Aminopropyltrimethoxysilane (AMMO).

Condensates and auxiliary condensates are also suitable for the previously mentioned aminosilanes. Auxiliary condensates may also be used in the form of partial aqueous solutions. Examples are Being DYNASYLAN 1446-1448. Other useful molecular amino silanes include those sold by Degussa Industries. : Evonik under the brand name DYNASYLAN AMEO and DYNASYLAN AMEO-T.

It is also possible to use auxiliary condensates obtained from aminosilane and at least one other organosilane such as tetraalkoxysilane. Condensates or auxiliary condensates are present, for example, in the application of German patent 3010115264.

Photo catalytic coating compositions typically include between 30% and about 95% bond by volume to the dry coating.

This concentration indicates the total ligand content per volume of composition or dry composition, which may include mixtures of two or more ligands.

Typically, the maximum amount of ligand in the composition is between about 40% and 95%, and about 50:95% or approximately 60:90% in other embodiments.

Coating compositions will contain approximately 30 to 90% bond or approximately 40-50-60-70 to approximately 90% of the volume of the dry coating.

Preferably, the amount of binder will be about 65:85%, or about 70% to about 85% by weight of the coating, or 70% to 80% binder by volume of dry coating.

In addition to photocatalytic titanium dioxide, the coating compositions of the invention may also include one or more pigments. The term “pigments” is intended to include, without limitation, pigment compounds used such as colorants including white pigments.

In addition to materials known in the field, such as “impermeable materials,” they include organic or inorganic aerosol compounds capable of giving blocking energy to the paint, especially at least one inorganic compound, such as titanium dioxide, that includes a dye, which is described in US Patent No. 6,342. 099 All Millennium Inorganic Chemicals Inc. chemicals described herein are incorporated by reference. In particular, titanium dioxide pigment. It may be titanium particles. It may be Tiona 595 or Tiona TML 696. Sold by LTD. Inorganic Chemicals: Millennium Inorganic Chemicals. Titanium dioxide pigment grade. Typically, it is in the form of rutile and is It has photocatalytic activity. A little pigmentary titanium dioxide. It may include aluminum oxide coating. Silicon dioxide or like a negative layer on the surface of particles.

The paint compositions according to the invention typically, but not necessarily, have a pigment concentration between about 5% and 30% by weight for the dry PVC composition, typically more between about 5 and 25%, or between 5 and 20%, preferably with paint compositions containing between about 10 and 50% pigment. PVC.

The coating compositions of the invention also typically include modifiers or pastes and filler(s) that thicken the coating layer and support the composition of the coating composition in polymer or plastic applications. These components generally refer to filler(s) while in coating applications they refer to modifiers.

Some modifiers may also provide energy testing function such as pigments, especially the highest volume concentration of wound pigment and the greatest modifiers are neutral in color.

Common modifiers include clay and solutions such as clay, Chinese clay, talc, quartz, quartz talcs, barnia, barium sulphate, and carbonate salts such as calcium carbonate, zinc carbonate, zinc carbonate, and magnesium carbonate. Calcium carbonate or mixtures from that source.

There is no specification on the amount of spreader used and the compositions on the other hand. Typically, invented coating compositions contain between about 1% and 50% of the spreader by volume of the dry coating PVC.

In some embodiments the configurations will comprise between about 1:30% of about 1%: about 20% or 1:10% of the volume. In other embodiments the configurations will include between about 5% and about 20%, between about 5 and 15%, or between 10 and 20% extensor material by weight.

Extensive materials that form alkaline are particularly useful because they may neutralize acidic species such as neutralize acidic acid, which is formed by photocatalytic oxidation of NOX types, nitrites and nitrate salts, which are made from neutralizing dissolved nitric acids and nitrates and removing them from the paint when Contact with water. Any excipient that forms kaolin is capable of reacting with nitric or nitric acid, including carbonate salts such as calcium carbonate, zinc carbonate, magnesium carbonate, and mixtures from that source. The kaolin mixture most generally used in coating applications is calcium carbonate, mixtures of two or more substrates. It is also expected in the invented coating compositions. In some embodiments, matrix materials that are not kaolin, such as China clays, clay alkaline, or silica, may be mixed with the alkaline matrix.

Their overall PVC pigment concentration for coating compositions that include the total amount of TIO2, photo catalytic pigment, and any extenders will typically be about 1% to about 70% of the volume of the dry coating composition. In some embodiments the total PVC embodiments will be about 1%:60%, about 5%:70%, H:60%, 5:50, or about 5:40% by volume PVC. More typically the total PVC will be about 10:70%, about 10:60, about 10:50%, about 10:40%, or about 10:30% by volume. In other embodiments now the total PVC will be about 15:35% or about 15:30% by volume preferably the total PVC for coating compositions will be about 20% to about 35% and about 50:30% by volume.

If necessary, various other compounds may be added to the composition of the invention, but in preference to this addition the shelf life, photo activity, durability or non-pigment properties of the resulting coating are not significant. Examples of these additive compounds include filler(s) such as quartz, calcite, clay, talc, barite, and/or AL, NA, Na-Al-silicate, and the like. Pigments such as TIO2 lithopone and other inorganic pigments. Other additives include thixotropes, such as bentones based on montmorillonite clays, and additives for flow control, throttle control, resistance crust, control or control of slack, and anti-crater agents.

It would be surprising to find coating compositions containing the TIO2 photocatalyst and an epoxy siloxane binder with total PVC pigment volume concentrations of less than 50% that have photocatalytic activity, a designed photocatalyst, and real oxidative NOX compounds, when activated by light, as expected. Photocatalytic coating compositions with high polymer content and identical low total pigment volume concentration do not have sufficient photocatalytic activity to produce self-containing, uncontaminated area bids useful e.g. Photocatalytic coating compositions are typically prepared with total PVC rates of 50% or higher to oxidize sufficient photocatalytic activity. Consider coating compositions that have significantly lower PVC rates that do not have sufficient photocatalytic activity due to the photocatalytic content and concentration of TIO2 particles. It is insufficient in bids for high polymer content.

Invented coating compositions including epoxy siloxane binder and TIO2 photocatalyst are present in an amount that has significant photocatalytic activity and superior durability over the first type shown when pigment volume concentrations of each will be less than 50%. Photocatalyst compositions are shown to be given with luster and luster. First class and no transparency. An important benefit for the compositions of the invention and the coatings that are a single coating for the compositions of the invention will be given the same corrosion resistance and durability as two separate coatings for the basic epoxy coating and polyurethane coating. Added coatings are self-sealing and remove contaminants. Accordingly, the invented coatings provide cost reduction and improved efficiency over standard coatings. .

The following examples are intended to assist in understanding the present invention and are not intended to be translated or interpreted to identify the invention in any way.

All modifications and equivalents that may become apparent to those skilled in the art where a prior reading explains the setting are included within the spirit and scope of the invention.

The examples

Preparation of paint compositions:

Each composition contains 15% TIO2 pigment 595 Tiona TIO2, TN pigment 696 Tiona and TIO2 photo catalyst 105 PVC, P from Millennium Inorganic Inorganic Chemicals. The amount of photo catalyst depends on the specific composition. Coating compositions are successful by adding the pigment TIO2 and the TIO2 photocell, and the modifier is made into polysiloxane resin diluted with butyl acetate and the resulting mixture is also stirred under high shear for 20 minutes. Polysiloxane resin sold by Degussa under the trade name SILIKOPON. EF is used for the coating compositions described below. Directly to the coating materials, the curing material, amino silane, is a polyurethane resin additive. Polysiloxane resin and other well-mixed aminosilate components sold by Degussa under the trade name Degussa amino are used for the coating compositions described below. The invention is not limited by any siloxane binder, raw epoxy and epoxy siloxane resins, exchangeable siloxane binders, and processed materials are included by the invention.

Each paint sample is applied to obtain 150 UM paint based on the dry weight of the coating on the material and materials tested in terms of the ability to remove NO2 compounds, self-cleaning ability and durability.

Example No. (1): Kidney PVC-linked NO activity:

The complementary methodology for determining NOX removal is described in US Patent Application No. 0167551/2007 described herein by reference. Briefly, the samples are described in a closed, air-tight sample chamber. The sample chamber is in contact with a three-channel gas mixer, Brooks Instruments, Holland, which contains NO, nitric oxide, and NO2, nitrogen dioxide, water vapor. The compressed air content is fed into the room at pre-determined rates.

Coatings including epoxy siloxane binder sold under the trade name SILIKOPON EF and DYNASYLAN A are prepared from compositions containing 7.5 TIO2 - photocatalyst 105 PV and 15% TIOC Summer Tiona PVC percentage as total PVC modifiers 30 40 - 50- 60- 70% and the difference in the total PVC in coatings is made by the modifier calcium carbonate. Samples are treated with saturated energy with 8 2M/M UV rays in the range 300: 400 NM from the UV model 365 LU 6 VL 312 nm wave lengths BDA The starting and final values ​​after five minutes of treatment with NOX radiation are measured by the ANALYSE model Nitrogen Oxides Analyser B 9841 UL (European Monitor) is connected to the sample chamber. The reduction percentage of NOX is measured as BNOX/NOX starting at 100.

Coatings are also retained for NO activity using COOPBSO in nitrogen. Samples are tested initially without any conditions, or after 7 and 28 days of exposure to the Atlas weather meter. The results are shown in Figure 1.

No one is exposed to the photocatalytic activity of the coating without previous conditions, such as exposure to UV and visible light. Photoactivity. Coatings with photocatalysts, on the other hand, show significant activity after 7 to 28 days of exposure on the Atlas weather scale.

Surprisingly, coatings with 30% PVC have important photo catalyst activity. NO 85: Approximately 65% ​​is removed after 7 to 28 days.

As shown in Figure 1, the formations with 60-70 PVC showed high photocatalytic activity, removing approximately 75% NO after one week of exposure and approximately 75% NO after 4 weeks of exposure. Coatings with 40% to 50% PVC have little nitrate activity on the other hand and coatings with 30% PVC exhibit enhanced photocatalytic activity. Unexpected 5% NO removal: approximately 58% after 1 week and NO 65% after 4 weeks of exposure.

Example No. (2): Improvement of the NO activity:

The activity of the photocatalyst and the durability of coatings at low rates of total PVC and TIO2 catalyst. The coatings are estimated to include an epoxy siloxane binder with 15% TIO2 PVC pigment 595 Toyota Tiona and PCVO TIO2 photocatalyst photo catalyst concentrations from 1% - 2.5 and 5 % PVC and total PVC rates of 20- 25- 30- 35%. It is estimated with respect to the onset of NO reductase activity and after 7 to 28 days of exposure on the Atlas weather scale.

The formula for TIO2 in the samples remains again at 15% PVC, and the difference in PVC is made by calcium carbonate and the percentage of NO removed as measured. The model of the Nitrogen Oxides Analyser B 9841 L is shown in the ratio of 7 to 28 weathering days in Tables 1 below. The percentage of NO reduction after 7 days of weathering is graphically depicted in Figure 2.

Table No. (1)

Total PVC percentage

105PV ratio

Get started

After 7 days

After 28 days

0.9

0.4

2.5

7.4

12.8

19.2

21.5

1.8

18.5

7.3

2.5

3.4

31.3

26.7

2.2

24.3

26.4

0.9

23.5

9.8

2.5

1.3

42.4

20.6

50.4

34.5

17.1

2.5

0.4

40.1

32.2

48.1

22.3

As expected, coatings with high rates or levels of photo catalyst 2.5 5% show better NO reduction. Important: All samples that are present except for the coating with 20% PVC and 1% photo catalyst, photo activity indicator. Samples 30 35% PVC and 2.5: 5% photocatalytic activity. Significant photocatalyst activity is considered a photocatalyst. Coatings again show almost no initiating activity, but initiating activity is shown, but significant activity is shown after exposure to the weather gauge. Day 7 Results generally show greater activity. The results also show that the activity generally increases as the photo catalytic rate increases and PVC is increased.

Example No. (3): The durability of the paint is linked or linked to the level of the photo catalyst. Durability:

The durability of various photocatalytic coatings derived from compositions including TIO2 photocatalyst and epoxy siloxane binder is estimated. The paint is placed on durable steel plates, durability improved, and durability is estimated as weight loss every 100 cm2 of the paint and exposed to known experimental conditions for different time tests. A complete product science for determining the durability of coatings is described in US Patent Application No. 0167551/2007 which is disclosed herein and incorporated by reference.

Methodology includes accelerated weathering 20: 50 Micro thickness of paint layers on stainless steel in a weatherometer A 65 CI, Atlas Electric Devices Chicago Weatherometer (Atlas Electric Devices, Chicago) under 6.5 KW Xenon source. The level of UV radiation at the surface of the panel is 0.5 2M/W UV at 340 NM. The radiant heat from the Min No dark peak Durability is measured as a function of the intended weight for the next exposure of the sample.

A- Durability of coating with 18% PVC and 0.06% TIO2 photo catalyst:

Epoxy siloxane, a light layer, basic model. Coatings are prepared at a concentration of approximately 15% to 18% PVC. The composition of the coatings includes silicone, SILIKOPON EF, amino siloxane, and amino siloxane DYNASYLAN AMEO. They are prepared and the durability is estimated. Coatings are prepared and zero 1-2. -3-4-5- 6% and TIO2 photocatalytic 105 PVC PC with a total formula volume concentration of 18% as recommended by the manufacturer to estimate the effect of photo catalytic level on durability Coatings. The durability of the coatings is estimated as a function of understanding the weight of the sample next exposed to accelerated weathering conditions on an Atlas A 65 CI Weatherometer (Atlas Electric Devices, Chicago) Under 6.5 KW NM coatings are exposed to weather conditions. An atlas for each of the 6772 hours of durability of coatings at different rates or levels of TIO2 photo catalytic is shown in Figure 3 as graphical explanations. Weight loss of coatings is affected by the level of photo catalyst.

B - Durability of coatings with 30-70% PVC and 7.5 TIO2 photo catalyst:

The durability of the coatings includes an epoxy siloxane binder with 7.5% TIO2 photo catalyst and total PVC levels of 30% - 40 - 50 - 60 - 70%, which are prepared according to standard parts. Figure 4 shows the coating durability for total PVC levels of 30-70% PVC and 7.5 TIO2 photocatalyst PVC annotated above in terms of photocatalytic activity. The coatings are displayed on the Atlas weather scale, especially at 1760 hours. The chart shows that coatings with total PVC levels of between 60% and 70% lost core weight faster than coatings with higher PVC levels. On the other hand, paint with 30% total PVC and 7.5 photocatalysts has better durability than paint with 70% total PVC and no photocatalyst. Moreover, at 30% total PVC and 7.5 photo catalyst level, the weight loss of the coating is reduced to approximately 4 times that of the blank for the same total PVC.

C: Durability of coating with 20: 35% PVC, 1 2.5 and 5% photo catalyst:

The durability of the coating with 20 25 - 30 - 35% total PVC and 1: 2.5 5 PVC. The level of the photo catalyst, which specifies the configurations used to produce the coatings, is found below in Table 2 below. The quantities of each components present in the weight percentage of total PVC and PVC photo catalyst are an indication of the volume percentage of dry coating.

Table No. (2)

PVC kidney

2

PVC photocatalyst

2.5

2.5

2.5

TIO2 morphology

37.47

37.02

36.26

35.69

35.24

34.58

33.63

37.03

TIO2 photocatalyst

2.5

6.17

12.1

2.38

5.87

11.52

2.27

5.61

11.01

COC3

6.74

4.16

14.44

11.89

7.78

21.42

18.92

14.86

Silicone EF

41.84

41.34

40.52

37.33

36.88

36.2

33.22

33.06

32.27

Dina Silan Amew

11.45

11.31

11.09

10.21

10.09

9.9

9.09

8.99

8.83

Butyl acetate

1.87

1.85

1.81

1.78

1.76

1.73

1.70

1.68

1.65

Table No. (2) continuous

PVC kidney

PVC photocatalyst

2.5

TIO2 morphology

32.5

32.11

31.66

37.78

32.73

TIO2 photocatalyst

2.17

5.36

10.54

COC3

27.79

25.32

21.34

8.5

29.46

Silicone EF

29.48

29.18

28.68

42.18

29.69

Dina Silan Amew

8.07

7.98

7.85

11.54

8.12

Butyl acetate

1.62

1.61

1.58

1.85

1.64

Coatings are displayed on the Atlas weather scale for a total of 3663 hours. Figures 5-6-7 show the lost weight of coatings as a percentage of weight loss for a coating layer as a photo catalytic loader. Figure 5 shows the durability of coatings with PVC block values ​​of 20-25-30-35% and 1% PVC photo catalyst. Figures 6-7 show coatings with the same levels of total PVC and 2.5 or 5% photo catalyst, respectively. Also included for comparison are coatings that are 20-55% PVC with a photo catalyst. The durability of coatings decreases without stimulation. Durability of coatings is reduced by high total PVC and TIO2 levels. High photo catalyst. The coating has a high weight loss of 35% PVC and a catalyst level of 2.5% PVC. Coatings with little weight loss or better durability have 20% less total PVC and no photo catalyst.

The data we obtain from accelerator containment experiments is based on multiple regression analyzes between total PVC, PVC photocatalyst, and paint weight loss in milligrams at 595 hours of exposure produced in the relationship. Lost weight = 2.81 total PVC + 9.79 PVC photo catalyst -45.07 with an R2 value of 0.76 The level that indicates the photo catalyst is of great importance for the durability of coatings.

Figure 8 shows the calculated half-life of the invented coatings with different levels of total PVC and photo catalyst levels. As indicated above, the opposite half-life is affected by higher levels of total PVC and photocatalyst. On the other hand, the average levels of both total PVC and photo catalyst display moderately long half-lives under accelerated weathering conditions, indicating excellent first-class durability.

Depending on this relationship and the typical layer thickness of 150 microns, it is calculated that the coating includes an epoxy siloxane binder without any photo catalyst and 20% PVC. It has a half-life of approximately 80 hours or 9 years under the tested conditions. The coating includes 35% PVC and 2.5 Photocatalyst A sample with a high observed weight loss has a half-life of approximately 8.50 hours, or 1 hour on an Atlas weather scale. Half-lives are calculated for various conditions in Atlas. Actual half-lives under real interfacial conditions may be significantly longer, for example based on a half-life of 80 on the Atlas weather scale. The estimated half-life is more than 60 years in the subtropical region, similar to that of Florida. The half-life and half-life are confirmed in the Atlas weather scale compared to approximately 7 years in a subtropical environment such as Florida.

Example No. (4): Determining the photo activity of paint toward methyl red:

The most usual way to evaluate coatings for self-cleaning is to apply a formula such as methylene blue to the paint and expose it to ultraviolet light to reveal the change in B* and L* values ​​to produce the color CLELAB Technical Report CIE Istria Colorimetry CIE Bulletin 15.2 - 1986 - CIE Peru Central CIE Central Bureau Vienna, Austria. Measuring the self-cleaning potential of paint. Epoxy siloxane coatings are not easily dyed with water-based solutions of methylene blue. Alternatively, methylene red is present in Isopropanol, which is present to dye the layers, and this is used in place of methylene blue. The method used for determining photo activity towards methylene blue is described in, for example, US Patent Application No. 0167551/2007 described here and incorporated in its entirety by reference.

The self-cleaning properties of each paint sample are based on infection activity, organic dye methyl red, such as the formula, it is soluble in water, carbon dioxide, and species containing nitrogen. Loss of color is observed. Photoactive activity is monitored by a B* meter (blue). (yellow) The protocol is as follows:

Prepare a layer of paint on the appropriate material, such as Melinex film, aluminum panel, or glass plate. The thickness of the layer must be similar to that used in the layer or final use, and in general it is not less than 25 microns in thickness when the paint layer dries, and it must be left To dry at least overnight.

Prepare methyl red solution by self-containing it in isopropanol to give a concentration of 1 mol/L. Pour the methyl red solution into the appropriate layer in which the paint layer appears and saturate or enrich the paint layers in the methyl red solution for 30 to 60 minutes to ensure that the methyl red is chemically absorbed onto the surface of the TIO2 surface.

Remove the paint layer from the solution and remove the excess from the fabric. Thoroughly dry the paint layers and measure the B* value using a colorimeter or spectrophotometer.

The paint layers are exposed to UV light for a period between 18 and 48 hours at an intensity of 30 to 60 M/W 2 / 300 400 NM positive lengths, such as an Atlas sun test booth.

Re-measuring the value of B*, the difference between B*, the beginning and the end of the measurements, confirms the measurement of the self-cleaning energy or strength of the paint. Many variations in the B* value have a great self-cleaning effect.

The paint is prepared at 20% PVC with different amounts of photo catalytic and pigment using methyl red. Coatings when exposed to water light change in the B* value scale. The results in Figure 9 show the change in the B* value and its percentage to the photo catalyst, which is subtracted from the change in the B* value for the blank paint. The two conditions for the results are identical.

Example No. (5) The effect of different degrees of TIO2:

The effects of titanium dioxide samples of different grades, Tiona 595 or 595T and Tiona 696 or 696T, can be seen in Figure 10 as a document of the total weight loss by each of the two digitals after exposure for the full time and for different levels of the photo catalytic. Tiona 595 has been developed with high performance and efficiency as a multi-purpose rutile pigment TIO2 that has a distilled surface and EZR52, AL2O3. It is acceptable for the entry and exit of water and coatings. The solvent Tiona 696 is the formula of high potential rutile TIO2 that has a regulation given by SIO2.

The result shows that the loss of the 696 T sample is generally low, although the differences between the two pigments are zero unless there is no photo catalyst present. Figure 10 shows a coating including both 595T and 696T pigments exhibiting similar durability with a catalyst content of 1:6%.

All references, including the patent classes and exigencies described herein, are included by the reference in their entirety and for all purposes by the same extension, such as if each individual publication, patent, or patent application is specifically and individually intended to be included by the reference uniformly for all purposes. Numerous modifications and variations of this invention may be made without deviation from the spirit or scope and will be obvious to those skilled in the art. The specific embodiments described herein are provided by one method of example and the invention is limited only by terminology for claims along the entire range that are equivalents to such claims as are thus qualified. Clearly the self-cleaning coating compositions remove the detected contaminants such as the photocatalyst titanium dioxide and a binder containing epoxysiloxane polymer.

The formations produce self-cleaning coatings with photocatalytic activity against pollutants in the air such as NO2 compounds.

General ideas

Preparing a summary of such writing should at least explain the ideas and general information by expanding the following:

The general idea described No. (1): For paint, contamination is still a self-cleaning component that includes:

I- Photocatalytic titanium dioxide.

II- The bandage includes a functional silicone compound, an epoxy, and an amino-functional compound.

III- One or more pigments

IV- Kaolin modifier, which is able to neutralize the combined acidic species of these Nox compounds.

Where the total pigment volume concentration of the composition or compound is about 5% to about 70% of the volume of dry coating.

General Idea No. (2): Formation of idea or concept 1 in which the amino functional compound is equal to the amount of the amine functional silicon compound.

General Idea No. (2): Idea or concept 1, where the amino functional compound is an amine functional silicon compound.

General Idea No. (3): Formation or synthesis of Idea 2, where the amino functional silicon compounds are aminosilane.

General Idea No. (4): Composition of Idea 1, where the epoxy-functional silicon compound is an epoxysiloxane polymer.

General Idea No. (5): Composition of Idea 1, where the epoxy-functional silicon compound is epoxy silane.

General Idea No. (6): Composition of Idea 1, in which an epoxy-functional silicon compound includes one or more final epoxy groups.

General Idea No. (7): The composition of Idea 1 also includes a polysiloctane polymer or a silane compound.

General Idea No. (8): Composition of Idea 1, where the pigment is titanium dioxide.

General Idea No. (9): Composition of Idea 1, where the photocatalytic titanium dioxide is greater than about 95% in anatase crystalline form.

General Idea No. (10): Composition of Idea 1, in which the total volume concentration of the dye is approximately 10: 50%.

General idea No. (11): Composition of idea 1, in which the concentration of the total pigment volume is about 10: 40%.

General Idea No. (12): Composition of Idea 1, where the concentration of the total pigment volume is about 15: 35%.

General Idea No. (13): Composition of Idea 1, where the concentration of the total pigment volume is about 15: 30%.

General Idea No. (14): Composition of Idea 1, where the concentration of the total pigment volume is about 20: 35%.

General Idea No. (15): Composition of Idea 1, where the concentration of the total pigment volume is about 20: 30%.

General idea No. (16): Synthesis of idea 1, in which the concentration of the total pigment volume is about 1: 10% photocatalytic titanium dioxide.

General Idea No. (17): Composition of Idea 1, where the composition includes about 1% to 5% of the photocatalytic titanium dioxide.

General Idea No. (18): Composition of Idea 1, where the composition includes about 1% to 3% of the photocatalytic titanium dioxide.

General Idea No. (19): Composition of Idea 1, where the composition includes about 1% to 5% of the photocatalytic titanium dioxide, and where the volume of the total pigment for the composition is about 10: 40%.

General Idea No. (20): Composition of Idea 1, where the composition includes about 1% to 5% photocatalytic titanium dioxide, and where the total formula volume of the composition is about 20: 35%.

General Idea No. (21): Composition of Idea 1, where the rate is calcium carbonate.