Untitled record

The This invention relates to a dental bleaching composition containing a selected photoinitiator and on a dental varnish based on selected cross-linkable Systems and selected photoinitiators.

It is generally known that discoloration and pigmentation the teeth on the microbial activity of the oral flora, but also to other extrinsic factors, such as the Deposition of colored substances, for example, tea or tobacco, or discoloration of reparative materials such Compositharzen, or metallic compounds, such as amalgam or silver nitrate, and Intrinsic factors such as aging, exposure to chemical due substances or drugs or dental injuries are. Since white teeth are generally an aesthetic are perceived as dark or discolored teeth, there has long been a strong interest in the development of materials for whitening teeth.

The Lightening or bleaching teeth is essentially a method for decolorizing colored substances by means of a chemical reaction. Peroxides are widely used in these bleaching compositions; this is the most important Reagent in conventional bleaching methods, a 30 to 50% strength hydrogen peroxide solution used in water.

A Another way to achieve a particularly efficient and quick teeth whitening is the use of photoactive Titania. Thus, a number of bleaching agents are known in which by additional use of a titanium dioxide photocatalyst The peroxides in the composition for improved Bleaching effect enabled. These photoactive titanium dioxides can optionally doped with various elements. But the whitening tooth effect of doped photoactive titanium dioxide alone is known, so that the use of peroxides also can be dispensed with.

In <patcit><text>DE 698 30 749 T2</text></patcit> becomes a method for bleaching discolored teeth described, in which a titanium dioxide powder and a hydrogen peroxide solution be applied to the tooth surface and with this visible light is irradiated, so that the teeth with Help the resulting mediated by the titanium dioxide photocatalyst Effect be bleached. The complete treatment for bleaching However, the teeth must in this process at the dentist be performed.

In <patcit><text>US-A-6,162,055</text></patcit> and <patcit><text>WO-A-99/40870</text></patcit> will photoactivatable compositions for bleaching teeth and a method described on its use. The disclosed there Compositions containing a transparent carrier component, an oxidant such as a peroxide, and a photocatalyst. As photocatalysts can include titanium dioxide, which are photocatalytically effective in visible light, used will; but can be found in these documents to no further Information. In addition, the complex bleaching process must be performed at the dentist will.

<patcit><text>EP-A-1356804</text></patcit> describes a means for tooth whitening comprising a titanium dioxide photocatalyst, a hydrogen peroxide generating compound, an inorganic or organic thickeners, phosphoric acid, and a condensed phosphate. The titanium dioxide photocatalysts used may optionally be doped, but they are only in the wavelength range from 300 nm to 500 nm photocatalytically effective.

<patcit><text>EP-A-1393711</text></patcit> describes a method for bleaching teeth by applying a solution containing nitrogen-doped titanium dioxides to the tooth surface is applied and irradiated with visible light. It could good bleaching properties of the composition are determined. however is this is also a for the patient costly treatment. Irradiation must individually on each tooth and the whole procedure must be repeatedly performed in order to obtain a satisfactory bleaching result.

It There is therefore a need for a simple and for the Users acceptable method for bleaching discolored teeth.

A Another problem, which, inter alia on the activity the bacteria of the oral flora is due, consists in the development of a variety of dental diseases, as tooth decay (caries) or inflammation of Gums (gingivitis) and tooth bed (periodontitis). The However, bacterial flora also draws yet another unpleasant feature by itself, namely, the bad breath, and for many People uncomfortable and taboo subject. to future To prevent dental disease, careful Oral hygiene and dental care necessary that the bacterial flora combated. The routine use toothbrush, toothpaste, mouthwash and dental floss as well as regular visits to the dentist to Plaque from the tooth and root surfaces remove, contribute greatly to such oral care. These However, routine must be done carefully and even then only to a limited extent in View effectively to specific oral conditions, as a Treatment regimens &lt;?page 3?&gt;long time and that the bacteria again multiply within hours in the oral cavity.

The Most of the products, which the formation of oral microorganisms suppress, are in need of improvement for several reasons. So often lack a sustained release of the Active substance, of adequate patient compliance and to pleasant taste; Further, the use of known products often cumbersome, often lack the ability the control of the dosage or the product may possible have toxic effects if, for example, are swallowed becomes. For this reason, there is the need for new antimicrobial Active ingredients and suitable methods which a sustained release the active ingredient in the oral cavity and thus efficient ensure protection against bacteria proliferation.

compositions where embedded antimicrobial agent and which mainly be used as dental varnishes, are due to their good adhesion suitable materials easily applied in the patient's mouth are thus able to achieve a continuous effect.

A large number of such dental coatings to protect against bacteria and oral diseases caused thereby are in the market available. As antimicrobial agents are other fluoride sources, chlorhexidine or triclosan used.

Fluoride varnishes are well known. The trace element fluoride is due to its caries prophylactic effect used in dental care. The Properties of fluoride is based on three mechanisms: <ul><li>- Influencing the de- and Remineralisierungsvorgänge on the tooth surface by forming a covering layer</li><li>- Increasing the acid resistance of the Tooth structure by diffusion into the tooth</li><li>- Antibacterial effects by obstruction of metabolism the plaque bacteria.</li></ul>

Despite its significant advantages, fluoride can in overdoses be toxic. In addition, through frequent overdose caused fluoride changes of enamel will that be orange by white, sometimes yellow to Stains indicate the incisors.

Under the substances with antimicrobial activity takes a chlorhexidine special position. It has proven over the years an effective way proved in dental hygiene. The preventive Approach is the reduction of Streptococcus mutans bacteria, which significantly influence the development of caries and development. However, the reduction in plaque, the reduction stand plaque and the destruction of the bacteria by chlorhexidine resulting discoloration, dysgeusia and diarrhea as potential side effects over.

<patcit><text>DE 698 18 287 T2</text></patcit> disclosed a protective varnish, which feature exposed dentin attached and as antimicrobial Triclosan contains. Triclosan (5-chloro-2- (2,4-dichlorophenoxy) phenol) increasingly since the sixties of the last century as disinfectants and preservatives in many personal care products, Detergents and antibacterial finished textiles used. However, with use of lower concentrations of the active ingredient is a risk that reinforced resistances and Cross resistance occurs when microorganisms.

In <patcit><text>DE 693 26 274 T2</text></patcit> becomes describes an intraoral device which the patient's mouth is attached. This device enables a pharmaceutical acceptable active agent such as an antibiotic, an antimicrobial or saliva stimulating agent and a Munddeodorans, through the slow dissolution effect of a core consisting of the active component, and a 2-hydroxyethyl methacrylate / methacrylate copolymer, by dispense the saliva in the oral cavity. However, the concentration of the available active ingredient limited due to its removal from the paint.

outgoing of the prior art it was an object of the present invention, provide a dental bleaching composition, which allows in addition to excellent bleaching action to help combat to afford the microbial flora of the mouth, the enhanced protection to achieve before oral dental disease.

A Another object of the present invention was to provide a dental varnish, which makes it possible to contribute to the to make the fight against microbial oral flora in order to achieve improved protection against oral dental disease.

The the object underlying the invention is in a first configuration, surprisingly achieved by means of a dental bleaching composition, a) at least one nanoparticulate, photoactive, with Carbon-doped titanium dioxide, and b) at least one oxidizing agent and / or contains a an oxidant generating compound.

Photocatalytic Materials are semiconductors which to light, electron-hole Paa&lt;?page 4?&gt;re arise, which highly reactive at the material surface generate free radicals. When titanium dioxide is a such a semiconductor. Applies the titanium dioxide in the removal of natural and artificial contaminants in air and Water by irradiation with UV light by the atmospheric oxygen reduced and the pollution to environmentally friendly end products is oxidized. However deploy conventional titanium dioxide photocatalysts their activity only with UV light. UV light is the human body is dangerous and can not therefore be used for long-term activation. In addition, these photocatalysts use less than 6% of the irradiated amount of energy on earth. By Special modifications are titanium dioxide photocatalysts in capable of not only ultraviolet rays but additionally To use the visible light.

On Way titania for visible light photocatalytic to activate the doping. understands the term doping is the incorporation of impurities into a semiconductor in order to change the electrical property of the material. Depending on the nature of the doping element one distinguishes between two major doping variants, the n-type doping (Excess of electrons) and the p-type doping (surplus of positive charges or electron deficiency).

A is plurality of n- or p-doped photoactive titanium dioxides known, for example from the documents <patcit><text>EP-A-1205245</text></patcit>. <patcit><text>EP-A-1205244</text></patcit>. <patcit><text>WO-A-2005/108505</text></patcit> and <patcit><text>EP-A-1254863</text></patcit>). In doped titania photocatalysts must be ensured, that doping elements are used which are stable and do not form volatile oxides. Further, on a low to ensure solubility of the dopant, in particular when the photocatalyst for use in liquid phases is provided.

In of the bleaching composition according to the invention is as a component a) a nanoparticulate, photoactive, with carbon-doped titanium dioxide used. This is in itself known and for example in the <patcit><text>WO-A-2005/108505</text></patcit> described.

The nanoparticulate, photoactive, carbon-doped Titanium dioxide of the component a), an anatase, rutile or brookite crystal lattice form, preferably a rutile.

Prefers comprises the measured at a temperature of 5 K electron spin resonance spectrum (ESR) of the nanoparticulate, photoactive, with carbon-doped Titanium dioxide in the range of g-values ​​from 1.97 to 2.05 only a signal, particularly at g values ​​from 2.002 to 2.004, in particular at a g-value of 2.003.

On Another component a) preferably employed nanoparticulate, photoactive, titanium dioxide doped with carbon has an X-ray photoelectron spectrum (XPS) with a strong absorption band at a bond energy of 285.6 eV, based on the O 1s band at 530 eV, on.

The in the bleaching composition according to the invention used as a component a) nanoparticulate, photoactive, carbon-doped titanium dioxide absorbed in contrast unmodified titanium dioxide visible light wavelength greater than or equal to 400 nm, preferably in the wavelength range from 400 to 800 nm.

at preferred variants of the component a) is that of the Absorbance proportional Kubelka-Munk function F (R_∞) at 500 nm about 50% and at 600 nm about 20% of the value at 400 nm.

The Photoactivity of the invention in the Bleach composition used as a component a) nanoparticulate, photoactive, carbon-doped titanium dioxide is preferably at least 20%, preferably at least 40%, in particular at at least 50%.

As Measure of the photoactivity is used Degradation of 4-chlorophenol by a defined amount of the nanoparticulate, photoactive, with carbon-doped titanium dioxide at 120 minutes Irradiation with light of wavelength greater than or equal 455 nm. The measurement method is described in detail in the <patcit><text>WO-A-2005 / 108.505</text></patcit> described.

Of the Carbon content of the invention in the Bleach composition used as a component a) nanoparticulate, photoactive, carbon-doped titanium dioxide is typically in the range 0.05 to 4 wt .-% with respect to TiO₂. preferably from 0.05 to 2 wt .-% and particularly preferably 0.3 to 1.5 Wt .-%. Best results are obtained with carbon contents of 0.4 to 0.8 wt .-% achieved.

Prefers is used in the bleaching composition according to the invention as a component a) nanoparticulate, photoactive, with Carbon-doped titanium dioxide used, the carbon to contains only in a surface layer.

Also preferably is in the bleach composition of the invention as a component a) nanoparticulate, photoactive, with Carbon-doped titanium dioxide used has a specific BET surface area of ​​100 to 250 m²/G, preferably 130 to 200 m²/ G, in particular 130 to 170 m²/ G.

&lt;?page 5?&gt;

The in the composition according to the invention as a component a) used nanoparticulate, photoactive, with carbon doped titanium dioxide may also further doping elements include, especially nitrogen and sulfur.

The Amount of nanoparticulate, photoactive, with carbon doped titanium dioxide of the component a) in the present invention A bleaching composition is in the range from 0.01 to 80% by weight, preferably in the range of 0.1 to 50% by weight, more preferably in Ranging from 1 to 20 wt .-%.

As Component a) may also be mixtures of different nanoparticulate, used photoactive, doped with carbon titanium dioxides will.

In the composition of the invention is as Part a) a nanoparticulate, photoactive, with Carbon-doped titanium dioxide used, the crystallites and / or having crystal aggregates and / or crystal agglomerates.

Under a crystal aggregate in the present invention is a misshapen Association of flat annealed understood crystallites.

Under Crystal agglomerate in the present invention, a not misshapen Association of z. B. at corners and edges together understood mounted crystallites and / or crystal aggregates.

Preferably in this case have the crystallites in the particle Range of 1 to 100 nm, in particular from 1 to 50 nm, and more preferably to from 1 to 25 nm. Lying crystal aggregates and / or Crystal agglomerates before, so they preferably particle sizes in the range of from 0.1 to 100 microns.

The inventive dental bleaching composition contains as component b) at least one oxidizing agent and / or an oxidizing agent generating compound.

The Amount of the component b) in the present invention Bleach composition is in the range of 0.1 to 50 wt .-%, preferably from 1 to 35 wt .-%, based on the total amount of composition.

Examples for oxidation agents are peroxides, peracids, salts or Perketone, preferably hydrogen peroxide, carbamide peroxide, Phthalimidoperoxohe xansäure, alkali percarbonate, alkali perborate, Alkaliperoxo-disulfate, peracetic acid, alkali hypochlorite and / or peroxides of organic acids or salts thereof and / or Addition compounds of hydrogen peroxide.

A an oxidant-generating compound in the context of the present Invention is a compound which is capable of in situ defined reaction conditions to release an oxidant.

In the dental bleaching compositions according to the invention preferably hydrogen peroxide-generating compounds used. These include for example hydrogen peroxide generating enzymes. An enzyme is a protein to be understood that has a specific biocatalytic function. On Such enzymatic system is capable of oxygen, for example, To generate hydrogen peroxide from the air. particular preference Amylases are used.

In a particularly preferred embodiment, as a an oxidant generating compound water used. Due to the induced by visible light, electron-hole pair Education, can the nanoparticulate, photoactive, carbon doped titanium dioxide oxidative and reductive degradation of substances initiate. In this case, oxygen in the air is reduced in a first step. The subsequent oxidation of water to a hydroxyl radical reaches the photocatalyst again its original electronic state. The formed in this redox reaction in situ Hydroxyl radicals are capable of cleaving pollutants by oxidation, such as the oxidation of the phospholipid membrane of microbes that whose death causes.

Surprised is that by the use of the nanoparticulate photoactive, carbon-doped titanium dioxide in the present invention dental composition in water due to its good photocatalytic Features an excellent oxidative removal of any Dental plaque is made possible and thus one of the main causes can be counteracted by oral dental disease.

On particular advantage of the inventive dental Bleaching composition is the possible waiver more bleach with simultaneous excellent bleaching effect.

In a particular embodiment, the invention dental bleaching agent composition as a component c) is a further nanoparticulate, photoactive, n- or p-doped titanium dioxide on. These are compounds which are derived from doped differ titanium dioxide of the component a).

&lt;?page 6?&gt;

The nanoparticulate, photoactive, n- or p-doped titanium dioxide of component c), an anatase, or brookite Ruthl- crystal lattice form and is selected so that it at wavelengths is from 400 to 800 nm photocatalytically effective.

Preferably has the nanoparticulate, photoactive, n- or p-doped Titanium dioxide of the component c) has a specific surface according to BET of 10 to 500 m²/G.

In the composition of the invention is as Component c) a nanoparticulate, photoactive, or n- p-doped titanium dioxide used, the crystallites and / or crystal aggregates and / or having crystal agglomerates.

Preferably in this case have the crystallites in the particle Range of 1 to 100 nm, in particular from 1 to 50 nm, and more preferably to from 1 to 25 nm. Lying crystal aggregates and / or Crystal agglomerates before, so they preferably particle sizes in the range of from 0.1 to 100 microns.

As Part c) Mixtures of different nanoparticulate, photoactive, n- or p-doped titanium dioxides be used.

Prefers are used as component c) in the inventive Composition, a nanoparticulate, photoactive, n- or p-doped titanium dioxide, comprising doping elements, which are selected from the 2nd, 3rd or 4th main group or the group of transition metals or of lanthanides.

As Doping elements for the component c) can all elements are used, a photocatalytic effect the nanoparticulate titanium dioxide at wavelengths from 350 to 800 nm enable.

Especially Preferred doping elements in nanoparticulate photoactive Titanium dioxide of the component c) are selected from the 4th main group or the group of transition metals.

Especially are photoactive as doping elements in nanoparticulate Titanium dioxide of the component c) nitrogen, palladium, platinum, silver, Aluminum, zirconium, silicon, germanium, tin and lead is used.

In a further embodiment, the dental Bleaching composition a support material d), in particular a curable substrate d).

Examples for support materials d) are polyacrylic acid, Polyvinyl pyrrolidone, polyacrylamide, acrylic acid-acrylamide copolymers, Polyurethanes, polyureas, polyethylene oxide-polypropylene copolymers, Polymethylvinylethermaleat, poly amides, polyethylene glycols and polypropylene glycols, Polysulfides, networked polydialkylsiloxanes and mixtures and copolymers from that.

The Solidifying curable support materials d) can by conventional cross-linking and / or polymerization, as ionic crosslinking (eg., alginate), radical polymerization (Z. B. (meth) acrylate polymerization), polyaddition (z. B. Polyurethane), cationic polymerization (z. B. aziridines), anionic polymerization (Z. B. epoxides), hydrosilylation and condensation reactions (eg. B. polysulfides) done.

On Example of a physical crosslinking of the constituent d) is the entanglement of formation of crystals.

Prefers employed curable substrates d), the solidify by chemical reaction, are alginates such as calcium; Acrylates and / or methacrylates or as monomers, oligomers, Polymers are used and the reactive acrylate and / or methacrylate radicals exhibit.

The dental bleaching compositions according to the invention can be formulated as one-component systems or multicomponent systems will. Particularly advantageous are two-component systems of two Components A and B.

The Component A case contains at least one nanoparticulate, photoactive doped with carbon dioxide of the component a) optionally in combination with at least one nanoparticulate, photoactive, n- or p-doped titanium oxide of the component c); Component B thereby contains at least one oxidizing agent or a precursor thereof of component b). By Separation of photoinitiator and oxidant components A) and B) can be an increased storage stability of the Precursors achieve.

Especially Two-component systems can be advantageously used, in which in Component A is a curable by peroxides substrate d) in addition to the nanoparticulate titania photoactive a) and optionally c) is provided. After mixing of components A and B causes the oxidizing agent b) of component B, the solidification a support material d). An example of such systems are combinations of bleaching agents such as hydrogen peroxide or other peroxo compounds, with radical polymerizable Compounds.

&lt;?page 7?&gt;

In a particular embodiment of the present invention are curable as curable substrate d) Polymers of group d ') used. The carrier materials of the type d ') is curable polymers selected from the group of crosslinking addition reaction Organopolysiloxanes which crosslink by condensation reaction Organopolysiloxanes which crosslink by condensation reaction Alkoxysilyreste containing polyether obtained by addition reaction crosslinking aziridino polyether containing, the addition reaction crosslinking alkenyl containing polyether radical by Polymerization crosslinking polymers covalently bound Ester residues of an ethylenically unsaturated carboxylic acid include, or crosslinking by ring-opening metathesis reaction Polyether silicones or rubbers and a nanoparticulate photoactive n- or p-doped titanium dioxide.

In a further embodiment the present invention relates a dental varnish containing <ul><li>a ') at least a nanoparticulate photoactive n- or p-doped titanium dioxide, and</li><li>d ') at least one curable polymer of the above for d') Compounds described.</li></ul>

at the photocatalyst a ') may be any compound the above for component a) and / or for Component c) compounds defined act. It can Mixtures of photocatalysts can be used.

The Amount of the component a ') in the inventive Dental varnishes is in the range of 0.01 to 80 wt .-%, preferably in the range of 0.1 to 50 wt .-%, particularly preferably in the range 1-20 wt .-%, based on the total amount of composition.

Especially preferably come in the dental varnishes of the present invention as a component d ') crosslinking by radical polymerization Polymers used, the covalently bonded ester groups of an ethylenically unsaturated carboxylic acid. Most notably preferably of which are covalently bonded through ester groups of an ethylenically unsaturated carboxylic acid crosslinkable polyalkylene and most preferably of those types which covalently bonded radicals of acrylic acid and / or methacrylic acid exhibit.

The can be used in both embodiments of the present invention curable polymers of ingredient d ') can have different configurations. Dependent on the particular polymer of the invention can Compositions as one-component or multicomponent systems, preferably be formulated as two-component systems. The curable polymers of ingredient d ') and its additional Components, such as catalysts and / or initiators, those skilled known per se.

The nanoparticulate, photoactive, doped titanium dioxide Component a), a ') or c) may, in addition to its function as a photocatalyst of the bleaching agent of the component b) also as Additional initiator for curing serve the curable polymer of component d ').

The can be used in both embodiments of the present invention curable polymers of ingredient d ') are, however, preferably in combination with the curable for this Polymers each characteristic catalysts and / or photoinitiators e) used.

Of the Proportion of curable polymers in the present invention Compositions comprising the components a ') and d') or containing Components a), b), d) and optionally c) is usually 5 to 80 wt .-%, preferably 10 to 70 wt .-%, based on the Total amount of composition.

Of the Proportion of this for curable polymers d ') characteristic Catalysts and / or photoinitiators e) in the invention Compositions is usually from 0.00005 to 10 wt .-%, preferably from 0.0001 to 5 wt .-%, based on the Total amount of composition.

Prefers are compositions comprising at least one curable Polymer of component d ') and at least one nanoparticulate, photoactive doped with carbon dioxide as a component a).

Prefers Compositions are used as component d ') organopolysiloxanes contain. Such compositions are, for. Example, from<patcit><text>DE 3410646 A1</text></patcit> known. It is known that different one between crosslinking through addition reaction organopolysiloxanes by condensation reaction crosslinking organopolysiloxanes, and by ring-opening metathesis crosslinking organopolysiloxanes. According to the invention, all of these polymer systems be used.

Further can as a component d ') by addition reaction crosslinking Organopolysiloxanes. addition reaction-curable organopolysiloxanes for example, from <patcit><text>DE 3410646 A1</text></patcit>. <patcit><text>DE 10017154 A1</text></patcit> known.

More preferred compositions &lt;?page 8?&gt;as a component d ') by Condensation reaction crosslinking organopolysiloxanes. By condensation reaction of curable organopolysiloxanes are known from <patcit><text>DE 4137698 A1</text></patcit> known.

More preferred compositions contain as component d ') alkenyl containing polyether. Curable systems of this type are for example, <patcit><text>DE-A-4010281</text></patcit> known.

More preferred compositions contain as component d ') alkoxysilyl containing polyether. Curable systems of this type are, for example, out <patcit><text>WO-A-2005 / 077,321</text></patcit> and out <patcit><text>EP-A-1,226,808</text></patcit> known.

More preferred compositions contain as component d ') aziridino containing polyether. Curable systems of this type are, for example, out <patcit><text>US-A-4,353,242</text></patcit> known.

More preferred compositions contain as component d ') ester residues containing an ethylenically unsaturated carboxylic acid Polyether. Curable systems of this type are, for example, out <patcit><text>EP 0170219 A2</text></patcit> known.

Especially Compositions as a component d ') is preferably at least a crosslinkable polyalkylene ethers, the acrylic acid and / or comprises methacrylic acid residues derived, contain, and at least one activated by heat and / or radiation Initiator e) and at least one nanoparticulate, photoactive titanium dioxide a '), preferably at least one nanoparticulate, photoactive, carbon doped titanium dioxide a).

These Compositions may comprise as two-component or particular be used as one-component formulations.

Prefers come-component compositions are used, the visible by Light in the wavelength range of 400 to 800 nm, UV-radiation, and / or cured by chemically curable systems will. In addition to the curable polymer system d ') and at least a nanoparticulate photoactive doped titania a ') therein are usually more known per se and for the respective polymer system suitable photoinitiators e).

As crosslinkable polyethers usually of polyalkylene derived and unsaturated carboxylic acids with ethylenically terminated polymers in question.

Typically is there are compounds of the formulas XII and / or XIII <st32:che xmlns:st32="http://lighthouseip.com/">R⁵⁰-A- (CO-R⁵⁰)_n1 (XII)</st32:che><st32:che xmlns:st32="http://lighthouseip.com/">R⁵⁰-CO-A- (CO-R⁵⁰)_n1 (XIII)</st32:che>wherein n1 is an integer from 1 to 5, preferably 1, 2 or 3, in particular 1, A is a radical of the formula Z- (O- (Cn2H2n2-O) m1-) n1 + 1 means Z a n1-valent hydrocarbon radical, preferably a from a two-, three-, four-, five- or hexavalent aliphatic Alcohol residue derived, in particular an alkylene glycol, trimethylolpropane, Pentaerythritol or sorbitol residue derived, n2 a whole Number from 2 to 8, preferably from 2 to 4, and m1 is an integer from 1 to 35,000, preferably from 50 to 1500, in which n2 and m1 within a molecule under of the given definition may be different, R⁵⁰ an ethylenically unsaturated Radical, preferably an alkenyl radical and the radicals R⁵⁰ within a molecule within the meaning given different could be.

All preferably, R⁵⁰ CH₂= CH- or CH₂= C (CH₃)-, so one derived from acrylic acid or methacrylic acid Rest.

Ethylenically unsaturated carboxylic acid ester groups having Polyether are generally used as mixtures of polymers of different Chain lengths. Typical molecular weights (number average) are in the range 150-3000000, preferably from 250 to 100,000, and particularly preferably 250 to 50,000.

These Polyether are usually caused by electromagnetic Radiation, preferably UV radiation or visible light cured. Photoinitiators can in this curable System z. B. camphorquinone and / or amines.

In are chemically curable thermoset systems preferably the peroxide and / or Hydroperoxidhärter, optionally combined with amines. For example, as in<patcit><text>EP 1754465 A1</text></patcit> described Systems.

More preferred compositions contain ethylenically unsaturated Carboxylic acids, especially acrylic acid and / or Methacrylic acid, and oligo mers or polymers containing at least two of ethylenically unsaturated carboxylic acids, in particular of acrylic acid and / or methacrylic acid radicals derived. Curable systems of this type are, for example, out <patcit><text>DE 10 2005 016 762</text></patcit> known.

&lt;?page 9?&gt;

Prefers are compositions comprising as component d ') acrylic acid ester and / or methacrylic acid ester monomers, acrylic acid ester and / or Methacrylsäureesterreste containing oligomers and / or Acrylic acid ester and / or Methacrylsäureesterreste exhibit containing polymers.

Examples for acrylic acid ester and / or methacrylic monomers are alkyl acrylates or methacrylates such as methyl acrylate, methyl methacrylate, n-butyl acrylate, n-butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, Lauryl acrylate, lauryl methacrylate, 2-phenylethyl methacrylate; mono- or polycyclic Cycloalkylacrylate and methacrylates such as cyclohexyl methacrylate Isobornyl acrylate and isobornyl methacrylate; Aralkylacrylate or methacrylates such as benzyl acrylate or methacrylate; Hydroxyalkylacrylate- or methacrylates, such as 2-hydroxypropyl methacrylate or 2-hydroxyethyl methacrylate; Esters of aliphatic diols and acrylic acid or methacrylic acid, as Butylglycolmethacrylat, Acetylglykolmethacrylat, polyethylene glycol, as triethyleneglycol, and diacrylate or dimethacrylate; Triesters of aliphatic diols with acrylic or methacrylic acid, such as trimethylolpropane or methacrylate. These monomers can also as oligomers, that is as short-chain polymers having up to 10 recurring structural units derived from the Above monomers; or polymers, ie as longer derived polymers having more than 10 recurring structural units are used by the above-mentioned monomers.

These Monomers, oligomers or polymers are usually by electromagnetic radiation, preferably ultraviolet radiation or visible hardened light. Photoinitiators e) can z In this curable system. B. camphorquinone and / or Amines.

More preferred compositions comprise, as component d ') over linkable ring-opening metathesis polymerization (ROMP) Groups are polyethers, polysiloxanes and / or synthetic rubbers. Curable systems of this type are known, for. Example, from <patcit><text>EP 1317917 A1</text></patcit>. <patcit><text>US 6,649,146 B2</text></patcit>. <patcit><text>WO 02/32338 A2</text></patcit> and <patcit><text>US 6,455,029</text></patcit>,

The dental bleaching compositions according to the invention or dental materials of the invention can as a gel, liquid, powder or preferably as a paste present. If the inventive dental Dental bleaching compositions or paints as multicomponent systems are used, the components can also be a gel, Liquid, powder or preferably as paste

at Two-component systems are combinations are preferred in which the components A and B as a gel and gel, liquid and Liquid, paste and paste, gel and liquid, Gel and paste, paste and liquid, powder and paste, present or as a powder and liquid.

The Compositions of the invention can additional reinforcing and / or nonreinforcing fillers f), preferably in a total amount from 0.01 to 80 wt .-%, particularly preferably 0.05 to 75 wt .-%, and most preferably from 0.1 to 70 wt .-%, based on the total Composition.

furthermore Other additives g), such as reaction inhibitors, polyvalent salts, wetting agents, stabilizers, surfactants, emulsifiers, alcohols, Water, solvents, buffer systems, dyes, pigments including dye systems which by pH or redox potential color change through, fragrances, flavoring agents, gelling agents and / or substances to increase the viscosity (thickeners and paste formers) Agents, optical scanning enabling substances Diagnostics enabling substances, antibacterial substances and / or fluoridation, be included. generally g other additives) used, of which facing the skilled person, that they are suitable, the compatibility in the oral cavity, the nature (viscosity, dischargeability) or improve optical or taste or appearance adjust.

Examples for alcohols are glycols, glycerol, polyethylene glycols, Propylene glycols, diethylene glycols and polypropylene glycols. Examples for surfactants and emulsifiers are fatty alcohol ethoxylates. Examples of thickeners and paste formers are polyvinylpyrrolidone, crosslinked polyvinylpyrrolidone, copolymers of N-vinylpyrrolidone and vinyl acetate, polyacrylic acid or its alkali metal or Alkaline earth metal salts, carboxymethyl, methyl, hydroxyethyl, hydroxypropyl cellulose and polysaccharides, silica, kieselguhr, diatomaceous earth.

The Solidification of the bleach composition of the invention or the dental paint of the invention is carried out after application to the teeth to be treated or Dentures. occur after the solidification of the constituents d) or d ') Compositions of the invention in a plastic or elastic solid state before. Here, the plastic State preferably a gel-like or pasty state and the elastic solid state is preferably a rubber-like state.

at Using a two- or Mehrkom&lt;?page 10?&gt;ponentensystems the components or mixed and then to the teeth Denture applied. The consistency of the material should thereby be such that it is z. B. coatable with a brush. The invention Compositions therefore have a relatively thin Consistency and also a sufficient elapsed time exhibit.

Typical Viscosities of the compositions of the invention are in the range from 100 to 1,000,000 mPa · sec, especially 1,000 to 100,000 mPa · sec, measured at 23 ° C.

After applying solidifies the invention Composition on the teeth. This has the advantage that the solidified composition from the teeth decrease or, can deduct in the presence of an elastic state. The composition of the bleaching agent or the dental varnish to be selected so that the solidified material, although good on the teeth is liable, however, without major slimming effort from the teeth or can be pulled off. Usually the material can be in one piece separate from the teeth and is discarded. The user usually needs not necessarily, in the removal of known Materials, remove the gel with a toothbrush.

The Bleaching compositions according to the invention containing components a) and b) can be for bleaching teeth Insert.

The Invention also relates to the cured coating, the by curing the compositions described above containing components a), b) and d) or comprising components a ') and d ') can be obtained. The cured coating is characterized by a bleaching and selbststerilisierende property out.

The Compositions of the invention containing Components a), b) and d) or comprising components a ') and d ') are preferably transparent. Transparent in the context of the present Invention means that sufficient light passes through the on teeth applied composition irradiated to the photocatalytic action to provide the component a) or a '). An advantage these compositions is that these after their application and curing on the tooth surface continuously make an impact.

On Another advantage of transparent compositions comprising components a), b) and d) or comprising components a ') and d') is the truth the external appearance of the user. Although the institution concerned the dental varnish in order, among other things to achieve an optical embellishment of his teeth, However, he does not want anyone when opening His mouth is attentive to the attached paint. The dental varnish can thus act in secret.

From Titanium dioxide and in particular of doped titanium dioxide is known to organic substances by their photocatalytic effect decompose. This property allows a long-term, however, temporary life of invention Compositions containing components a), b) and d), or comprising Components a ') and d'). Due to the fact that the dental varnishes dissolve by itself, no complex Removal of the lacquer.

The Compositions of the invention containing Components a) and b) or according to the invention Compositions containing components a ') and d') can be advantageously to whiten teeth or Insert denture.

also can be compositions of the invention containing components a) and b) or according to the invention Compositions containing components a ') and d') for prophylaxis antiplaque by Ausbil training a selbststerilisierenden surface Insert.

On Another field of application of the invention Compositions comprising components a) and b) or of the compositions according to the invention containing components a ') and d') is the fissure sealing.

About that addition, compositions of the invention can be containing components a) and b) or according to the invention Compositions comprising the components a ') and d') of coating use of dental ceramics. Thus, in the production of dental ceramics on the surface of the invention Dental varnish are applied. When burning the treated ceramics, volatilize the organic components and the nanoparticulate titania photoactive of ingredient a) or a ') diffuses into the ceramic surface. On this way one obtains a selbststerilisierende ceramic, which prevents the risk of infestation by bacteria or microbes or decreased.

&lt;?page 11?&gt;

QUOTES INCLUDED IN THE DESCRIPTION

This list the documents cited by the applicant has been automated created and is exclusively to inform the reader's convenience. The list is not part of the German Patent or utility model application. The DPMA takes no liability for errors or omissions.

Cited patent literature

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