Non-dusting homogeneous pigment preparation

Dust-free, homogeneous pigment composition

Technical field

The invention relates to a non-dusting homogeneous pigment composition, in particular to a composition comprising at least 40% by weight of one or more effect pigments, 0.5 to 50% by weight of water and / or organic solvent or solvent mixture and 0.5 to 59.5% by weight of styrene modified maleate a resin having an acid number> 90 mg KOH / g based on the pigment. Pigment compositions of this kind are particularly well suited for the production of dry compositions such as granules or chips. The invention also relates to the production of pigment compositions and granules and their use for pigmenting printing inks.

BACKGROUND OF THE INVENTION

In industrial processes, pigments are often not used in the form of dry powders, since such powders create dustiness, which means increased requirements for workplace safety. In many cases, in addition, when powders are introduced into plastics, printing inks, industrial coatings and primer systems, pigment pigment aggregation occurs. The homogeneous distribution of the pigment in the respective matrix is ​​difficult to achieve, if at all impossible.

Instead of the pigment powder, non-dusting pigment compositions or dry compositions are used. They are:

- free-flowing powders, pearlescent pigments coated with polymers, as described, for example, in DE-C-2603211,

pigmented free-flowing powders having a low moisture content known, for example, from DE-ft-4139993,

- pigmented powders having a relatively high moisture content, often referred to as pastes because of their liquid consistency,

- pigment formulations in the form of granules in which the organic pigments are coated with a mixture of resins as described in EP 0 897 956 A2, or

dry compositions, such as pellets, granules as precursors for printing inks, as known from EP 0 803 552.

Non-dusting, homogeneous pigment preparations and dry formulations prepared therefrom are an industrial alternative to dry or moistened powders as long as they meet the general conditions:

- liquid scrub

- minimum extensibility

- maximum pigment content.

The components of the composition / paste or dry compositions are selected such that the formulation is very effectively balanced with the other components of the respective coating system and is readily homogeneously distributed upon incorporation.

In addition to good compatibility with the other components of the coating system, the pigment formulations and the dry formulations produced therefrom are required to lead to high stability in the coating system, which means that they must not tend to phase separation, or where this cannot be completely achieved. In order to eliminate it due to the low viscosity, the coating system must be able to readily return to a homogeneous state, so the sediment deposited must be readily dispersible. This requirement is particularly important in the case of platelet-shaped pigments since, due to their structure, such pigments tend to form cakes with phase separation and are difficult to mix. Pigments based on platelet-shaped substrates increase handling problems in that they, due to their size and density of pigments, easily settle and can then aggregate to form a very solid sediment cake. Such a cake is difficult to stir. This is particularly true for storage but also for the processing of lacquers, paints and printing inks.

Therefore, several methods have been developed to solve the problem of incorporating and handling platelet-shaped pigments in coating compositions. Resuspension can be ensured by adding additives to the coating composition that provide additionally controlled flocculation (card house effect), pseudoplastic and / or thixotropic behavior, or steric and / or electrostatic pigment repellency. However, these additives may have a detrimental effect on the quality of the coating. In particular, in the case of effect pigments, briquetting and coating uniformity can be reduced.

In addition, a homogeneous, stable distribution of the redispersants in the pearlescent pigment powder is difficult to achieve and / or the redispersant loses part of its activity during mixing.

The pigment formulations developed so far with a pigment content of & gt; 30% by weight do not sufficiently satisfy the above requirements, in particular because they tend to agglomerate and shear densify.

It is therefore an object of the present invention to provide a pigment composition, in particular in the form of pastes and dry compositions, which can be used very effectively in aqueous printing inks and solvent-free or solvent-free coating systems having high stability, In addition, the pigment composition of the present invention is to be highly suitable for the preparation of dry compositions in the form of, for example, pellets and granules.

Surprisingly, it has been found that this object can be achieved with the pigment composition of the invention. Styrene-modified maleate resins, in combination with effect pigments, such as pearlescent pigments, exhibit universal compatibility in aqueous printing inks and solvent-based or solvent-free coating systems, for example. In addition, the formation of an interference phenomenon in the case of pearlescent pigments is encouraged.

SUMMARY OF THE INVENTION

The non-dusting homogeneous pigment composition according to the invention consists in that it contains by weight:

-> 40% of one or more effect pigments

- 0,5 to 59,5% styrene-modified maleate resins having an acid number> 90 mg KOH / g,

- 0,5 to 50% of water or an organic solvent or solvent mixture,

- 0 to 10% of neutralizing agent,

0-10% of the modifying agent.

Depending on the moisture content, the composition of the invention is a liquid paste or a moistened free-flowing powder. Both such products are highly suitable for the manufacture of dry compositions such as granules, pellets and briquettes. The use of styrene-modified maleate resins makes it possible, in particular in the manufacture of non-dusting pigment granules, to achieve better formulation than that obtained with prior art polymeric resins (for example EP 0 803 558 A1). The invention also relates to dry compositions prepared from the pigment formulations of the invention.

In addition, the products of the present invention are non-absorbent, readily free-flowing, can be readily incorporated into and compatible with commercially available binder systems. In particular, the products are compatible with aqueous printing inks and solvent-based or solvent-free coating systems. Paints and varnishes made from dry products such as granules or chips are suitable for etched, flexographic and screen printing, for offset overprint varnishes, overprint varnishes (OPV) and also for various coating systems from industrial coatings and the automotive industry. also for coloring plastics.

The pigment composition according to the invention preferably contains 40 to 98% by weight, in particular 45 to 95%, of effect pigments, based on the composition as a whole. Particularly preferred are pigment compositions having an effective pigment content by weight of greater than 50%. The weight percent refers in each case to the wet, i.e., undried, pigment composition

The effect pigments used are pigments based on translucent or semitransparent substrates of plate shape, such as foliate silicates such as mica, synthetic mica, talc, sericit, kaolin or other silicate materials, platelet iron oxide, silica flakes, titanium dioxide flakes, graphite flakes, flakes of iron and aluminum oxide, glass, holographic pigments coated with rare earth metal sulfides, such as crisp sulfide, colored or colorless metal oxides, for example, titanium dioxide, titanium suboxides, titanium oxynitrides, iron (III) oxide, iron (III) iron, tin (III), zinc, copper, micelium and other metal oxides alone or in a mixture, in a single uniform layer or in successive layers multilayer pigments). Multilayer pigments are known, for example, from published patent applications without exploration number DE 197 46 067, DE 197 07 805, DE 197 07 806, and DE 196 38 708. Pigmented pearlescent-based pearmen-based pigmen are known, for example from German patent applications 14 67 468, 19 59 998,

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commercially available under the trade name Mit.anex^R and Iriodin^R(Merck KGaA, Darmstadt., Germany.

Particularly preferred pigment formulations comprise as pigments a tannic oxide system, a metal oxide, an iron oxide / metal oxide and / or a titanium dioxide / mica iron oxide. The silica flakes may be coated, for example, as described in WO 93/08237 (chemical wet coating) or DE-A 196 14 637 (CVD method). Alumina flakes are known, for example, from EP 0 763 573. Platelet-shaped substrates coated with one or more rare earth metal sulfides are described, for example, in DE 198 10 317.

Also suitable are metal effect pigments, in particular aluminum flakes adapted for aqueous systems (a commercial product of Eckart under the name Rotovario Aqua).^R or St-apa Hydroxal) as well as Variocrom pigments^R and Paliocrom^R (BASF), including the known pigments described in particular in published patent applications EP 0 681 009, EP 0 632 110, EP 0 634 458 as well as LCP (liquid crystal polymer, liguid crystal polymer) pigments. Likewise, all platelet-shaped pigments known to those skilled in the art having metal layers are further suitable. Pigments of this type are commercial products of Flex, BASF, Eckart and Schlenk.

The pigment compositions of the invention may contain one or more effect pigments. In many cases, at least two effect pigments can be used to achieve special color effects and gloss. Preferred pigment compositions comprise one or more effect pigments based on mica flakes and / or silica flakes. Mixtures with up to 10% by weight of organic and inorganic pigments based on the pigment composition as a whole are also possible.

In particular, the addition of one or more colored and / or organic pigments such as, for example, Mikrolit-h (Ciba) or Hydrocolor / Solcolor (a commercial product of MK Chemical) in a dispersed form results in special color effects. Substances and particles (tracers) that allow product identification (product protection) may also be added.

As a necessary component, the pigment preparations according to the invention contain a styrene-modified maleate resin having an acid number of&gt; 90 mg KOH / g in an amount of 0.5 to 59.5% by weight, preferably 5 to 40, particularly 10 to 30%. acrylic resin resins having an acid number of&gt; 100 and in particular&gt; 150.

The styrene-modified maleate resins used have an average molecular weight of 500 to 200,000, preferably 1000 to 100,000, especially 1000 to 50,000. Styrene-modified maleate resins with a molecular weight of 2500 to 3500 are particularly preferred. In the case of otherwise the same properties, low molecular weight polymers are preferred, since they generally have a smaller thickening effect in coating systems.

Styrene-modified maleate resins are prepared by free radical addition polymerization, in particular copolymerization or terpolymerization, during which saturated and unsaturated alcohols as well as other functional additives can be incorporated in wide proportions. In particular, polyethylene and polypropylene units or mixtures of alkylene oxides, as well as alkylene oxide esters, alkylene oxide amines, alkylene oxide ethers and free carboxylate, can also be incorporated into the polymer backbone. this group. This incorporation is a particularly great advantage for the compatibility of the products of the invention in aqueous systems. Styrene-modified maleate resins usually have a ratio of styrene to maleic anhydride of 1 = 1 to 4 = 1. The styrene-modified maleate resins thus prepared are important for their light stability (not yellowing), their oxygen resistance (storage stability), their autoignition resistance and their low static charge.

Particularly preferred are α-methylstyrene modified maleate resins. It is preferred according to the invention to use resins having a glass transition temperature above room temperature. This eliminates clogging and lack of free flow capability of dry agents. For example, the maleate resins used have a glass transition temperature of preferably 35 to 170 ° C, especially 40 to 80 ° C.

The resins used are preferably 45 to 180 ° C, in particular 50 to 90 ° C.

Styrene-modified resins are also commercially available, for example under the trade name SMA^R (ElfAtochem).

In the preparation of the pigment preparations according to the invention, it is preferred that they contain from 0 to 10% by weight, preferably from 0.05 to 5% and in particular from 0.01 to 3% of modifier. The modifier used is in particular polyalkylene oxide or a derivative thereof. and dissolution rates of the dry compositions. Further preferred modifiers are reaction-enhancing resins such as urethane resins, nitrocellulose and all known cellulose derivatives, polyesters, polyvinyl chloride, sulfopolyesters, polyethylene glycol esters and ethers, emulsifiers and surfactants in an amount of 0.1 to 10, preferably 0.05 to 10 5%, in particular 0.01 to 3%, based on the composition as a whole.

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In particular, it is also possible to add to the pigment composition according to the invention accelerators and agents contributing to the disintegration and dissolution of pigment granules, for example spherical particle aggregates such as hollow spheres, hemispherical beads, swelling agents with a strong swelling force, gases and / or substances with very high solubility.

As a further component, the pigment compositions of the invention or the dry compositions produced therefrom contain one or more neutralizing agents. Particularly preferred are bases known in the art of coating such as urea, urea derivatives, ammonia, aminoalcohols, alkali metal hydroxides such as potassium hydroxide and sodium hydroxide and amines, for example in the case of aqueous formulations, the bases are preferably non-volatile organic amines with low molecular weight or amines of this kind whose volatility at 100 ° C is low.

The acid number of the modified maleate resins in conjunction with the neutralizing agent imparts water solubility to the resins. The water solubility of the present invention is important in connection with the preparation process to enable preparation on the waterway, and water solubility is a prerequisite for the use of aqueous systems and water-based printing inks (compatibility).

In general, the pigment composition according to the invention contains 0 to 10% by weight of neutralizing agent, preferably 1 to 7%, in particular 1 to 5%, based on the pigment composition.

Optionally, the addition of a redispersing agent in the form of bulk particles, such as fibers or spherical particles, prevents the pigments produced by the process of the invention from depositing more readily as a result of the pigments produced by the process of the invention. · Steric repulsion and thus induction of strong adhesion. As a result, =

1. the compositions of the invention are more stable; and

2. Due to the incorporation of redispersing aids into the paint or varnish system by means of a pigment formulation, effect pigments settle more slowly in paint and varnish systems:

however, in all cases the sediment is less hard and there are no problems with its agitation.

The redispersing agents are used in an amount of up to 5% by weight, in particular from 0.05 to 3% by weight of the pigment composition as a whole. All organic and inorganic fibers known to those skilled in the art of 0.1 to 20 µm in length can be used. Particularly preferred particles are all synthetic fibers, for example polyethylene, polyacrylate, polypropylene, polyamide, cellulose, inorganic fibers, preferably of silicon compounds, glass fibers, and also especially of the isocyanate-modified and monoamine and diamine-modified condensation products. These condensation products, which are dimurea derivatives and aminureas having urea groups, are known as thixotropic agents and, together with a binder, are added to paints and varnishes to improve flowability and abrasion ability.

Redispersing agents which may be used are all of the urea derivatives and urethane compounds known to those skilled in the art, for example, as described in EP 0 198 519, DE 18 05 693.4 and in Organic Coatings: Science and Technology CA. Heenriga, PJG von Hemsbergen, st. 201-222, New York 1983).

Preferred spherical materials are in particular hollow glass, wax or polymer beads made of vinyl resins, nylon, silicone, epoxy resins, olefin resins and polystyrenes and inorganic materials such as for example titanium dioxide, silica or zirconium dioxide. Preference is given to using hollow beads as well as solid beads having a particle size of 0.05 to 150 µm. Hollow glass, wax or polymer beads are particularly preferred in the pigment compositions of the invention.

3 to 10 µm silica spherical particles are known, for example, as a high performance liquid chromatography material and are, for example, a commercial product of LiChrospher^R (Merck KGaA, Darmstadt, Germany). Such materials preferably serve in monodisperse form, i.e. with substantially the same particle size. Monodisperse spherical particles of this type based on silica, titanium dioxide and zirconia are known. For example, monodisperse silica is prepared according to DE 36 16 133. Hollow glass beads are, for example, a commercial product of Q-CEL (PQ, Sp. St. A.) Or Scotchlite (3M, Frankfurt, Germany).

In addition, the pigment composition according to the invention may contain surfactants, for example alkyl silanes, which may for example also contain other functional groups, or unsaturated or saturated fatty acids or fluorinated surfactants. Especially preferred is the use of the silane compounds of formula (C)_nH2n + i) Si (OCmH2m - »- i) 3. wherein η is 1 to 30 and 1 to 10 as surfactants. Examples of suitable silane compounds are n-hexyldecyltriethoxysilane and n-octyldecyltriethoxysilane (Si 116 and Si 118, from Degussa AG, Frankfurt, Germany) as well as the corresponding fluoroalkylsilanes.

When the silanes are added, the pigment composition preferably further comprises surfactants or fatty acids. The surfactant may also contain a mixture of silanes, fatty acids and / or surfactants. the compositions may contain 0.1 to 5% by weight,

0.2 to 3% and in particular 0.5 to 2% of surfactants based on the composition as a whole.

Pigment preferably

Other surfactants which may be used are saturated or unsaturated fatty acids such as caproic, caprylic, capric, lauric, myristic, palmitic, stearic, oleic, linoleic and also fatty acid mixtures, for example.

The pigment preparations according to the invention contain from 0.5 to 50% by weight, preferably from 1 to 45% by weight, in particular from 1 to 40% by weight, based on the composition as a whole, water and / or organic solvent or solvent mixture.

solvent resin,

The solvent components in the pigment compositions of the invention must be matched to a resin having an acid number&gt; 90 mg KOH / g. Examples of suitable solvents are aromatic such as toluene, gasoline, xylenes, hydrocarbons as well as esters, cyclohexane, furans, dioxanes, long chain chunky hydrocarbons, vegetable amines oils, monohydric aliphatic alcohols such as C 2 -C 4 alcohols, for example ethanol, buatnol, or isopropanol, or ketones, for example acetone or methyl ethyl ketone, or glycol ethers such as propylene glycol monomethyl ether, propylene glycol monoethyl ether, or diols such as ethylene glycol and propylene glycol, or polyether diols, aliphatic triols and C2 -C6 tetraols such as trimethylolethane, trimethylolpropane, glycerol, 1,2,4 butanetriol, 1,2,6-hexanetriol and pentaerythritol and all other solvents from other classes of compounds, or mixtures of said solvents. It is preferred to use the solvents listed by Karsten CLackrohstofftabel len, 9.

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9 (9999 edition 1992).

The pigment compositions of the invention are produced in a simple manner by adding the modified maleate resin without water or with water and / or an organic solvent or with a mixture of solvents, modifier and optionally other additives simultaneously or sequentially to the effect pigment or effect pigment mixture and subjecting the resulting mixture to slight homogenization in a mixer.

The pigment is preferably introduced as a starting batch and is first brought into a paste state by mixing with water and / or an organic solvent or a mixture of organic solvents containing a maleate resin and optionally a modifier at this stage; optionally, additional solution containing water and / or solvents and additives is added.

During or after this preparation, other conventional additives may be added to the pigment composition of the present invention, for example, antifoam agents, wetting agents, anti-settling agents, leveling agents, driers and thixotropic agents. These are auxiliaries which are customary in the coating industry and which can be present in the pigment composition according to the invention in an amount of 0 to 10% by weight. Succinate derivatives, for example the commercial products of Hydropalat, are particularly mentioned here. 875 (Henkel).

The resulting wet pigment composition of the invention is a homogeneous powder or easy-flowing paste having a relatively high effect pigment content. Due to the particularly high compatibility of the styrene-modified maleate resin, the pigment composition of the invention is also fully compatible with commercial printing ink systems, usually aqueous, solvent-based or solvent-free. Other features that distinguish the pigment compositions of the present invention are the dustiness, ease of dispersibility, and ease of redispersibility, so that they are significantly superior to conventional pigment compositions.

To produce dry compositions, the pigment composition of the invention is extruded or processed by other methods known to those skilled in the art, compacted into compact particles, for example by tableting, briquetting, pelletizing, granulation, spray granulation, fluidized-bed granulation, or extrusion, and can then be dried . It is usually dried at a temperature of from 150 to 150 ° C, preferably 60 to 120 ° C, optionally under reduced pressure. Dry compositions such as chips, pellets, briquettes or granules have, for example, a moisture content of less than 5% by weight, preferably less than 3% by weight. The granules have a pigment content by weight higher than 70%, preferably higher than 80%, based on the granules. Finally, the optionally dry product is classified. The dry granules thus obtained have favorable properties which are further improved with respect to water and / or solvent-containing compositions = the absence of liquid components enhances compatibility. In particular, the dry granules also surprisingly do not exhibit wetting problems. Conversely, when added to an aqueous binder or a polar solvent binder (e.g., ethanol, ethyl acetate, MEK), the granules disintegrate rapidly and instantaneous wetting occurs. Other advantages of dry formulations are improved storage stability, ease of transport and improved product safety for consumers. Granules, for example in the form of pearls, are very readily liquefied, easy to measure and combine all these properties with total elimination of dustiness. The volume of these granules is reduced to approximately a third of the volume of the pearl luster powders. The particle size of the dry compositions is 0.1 to 150 mm, preferably 0.1 to 20 mm, in particular 0.1 to 2 mm.

In addition to good compatibility with coating systems and synergistic phenomena with the other components in the pigmented center. or in a dry composition, the high acid value of the styrene-modified maleate resin allows the resins to be converted together with the neutralizing agents into a water-soluble form. The production of dry compositions, such as granules, chips, pellets or briquettes, may therefore be on a waterway that offers considerably greater manufacturing safety compared to the use of solvents.

Integrating and redispersing aids ensure that even in finished lacquers and paint systems, the pigment compositions of the present invention are easy to mix and require no further refinement by the final processing.

The improved disintegration of dry formulations when incorporated into binders, for example in the case of printing inks, is evident even with small amounts of spherical particles in the pigment formulation. For example, when granules having a spherical particle content of 0.5% by weight, based on the dry composition as a whole, are used, the disintegration rate is greatly increased and the ink stability is achieved more quickly (viscosity / hue).

The dry compositions do not dust, are easy to flow, can be easily incorporated into and compatible with commercially available binder systems. In particular, the products are compatible not only with aqueous and solvent but also solvent-free printing inks and coating systems.

In the form of a paste or dry composition, the pigment composition of the invention can be used for various applications. It is preferably used in coating systems for the printing sectors, in particular for printing, offset and gravure coating, flexographic printing and screen printing. With particular preference, the composition or the dry composition produced therefrom is applied as a precursor for coating compositions to any desired substrate 16 such as cast iron, steel, aluminum, copper, bronze, plastic. , brass and also metal foils and also glass, ceramics and concrete and also wood, for example veneers, clays, textiles, paper, packaging materials, for example plastic containers, films and cardboard or other materials for decorative and / or protective purposes.

The invention also relates to the use of the pigment composition in formulations such as paints, varnishes, printing inks and plastics as well as to automotive coatings, powder coating materials and coating compositions in general.

The invention is illustrated by the following examples.

DETAILED DESCRIPTION OF THE INVENTION

Example 1

Dissolve 67 g of SMA^R-1440 F (styrene-modified maleate resin from Elf-Atochem) in 590 g of deionized water and a solution of 18 g of 25¾ ammonia. After addition of 16 g of polyethylene glycol 2000 (Merck KGaA), the mixture is homogenized until a clear solution is formed.

This solution is then introduced into 1000 g of Iriodin^R 103 (titanium dioxide / mica pigment with 10-50 µm particles from Merck KGaA). The composition thus obtained is granulated on a TR 01 granulation plate from Eirich. Dry for 48 hours at 60 to 120 G. The coarse fraction of particles is separated on a 2 mm sieve. The fine fraction was collected on a 0.4 mm sieve.

The granules thus prepared are abrasion resistant and are compatible with a conventional solvent-containing Haptobond F 105-Verschnitt H 75659/691 extender and a solvent containing Rotationsverschnitt 50.36 rotary extender from SICPA.

Example 2

Dissolve 67 g of SMA^R-1440 F (styrene-modified maleate resin from Elf-Atochem) in 479 g of deionized water and in a solution of 29 g of 2-amino-2-methyl-1-propanol (75% in water). After dissolving the resin fraction and adding 16 g of polyethylene glycol 2000 (from Merck KGaA), the mixture was homogenized until a clear solution was formed.

This solution is then introduced into 1000 g of Paliochrome^R Gold L 2002 (BASF effect pigment). The composition thus obtained is granulated on a TR 01 granulation plate from Eirich. Dry at 72 to 120 ° C for 72 hours. The coarse fraction of particles is separated on a 2 mm sieve. The fine fraction was collected on a 0.4 mm sieve.

The granules thus prepared are abrasion-resistant and are compatible with conventional 350081 aqueous offset overprint varnish (Veilburger Lackfabrik).

Example 3

Dissolve 67 g of SMA^ft-1440 F (from Elf-Atochem) in 590 g deionized water and in a solution of 29 g 2-amino-2-methyl-1-propanol (75% in water). After dissolving the resin fraction and adding 16 g of Hydropalat 875 (Henkel sodium sulfosuccinic acid), the mixture is homogenized until a clear solution is formed.

This solution is then introduced into 1000 g of Iriodin^R 103 (effect pearlescent pigment from Merck KGaA). The composition thus obtained is granulated on a TR 01 granulation plate from Eirich. It is dried at 60 to 120 ° C for 48 hours. The coarse fraction of particles is separated on a 2 mm sieve. The fine fraction was collected on a 0.4 mm sieve.

The granules thus prepared are resistant to abrasion and are compatible with a conventional aqueous offset wash. Veilburger Lackfabrik.

Example 4

Dissolve 67 g of SMA^R-1440 F (from Elf-Atochem) in 590 g deionized water and in a solution of 29 g 2-amino-2-methyl-1-propanol (75¾ in water). After dissolving the resin fraction and adding 16 g of polyethylene glycol 2000, the mixture is homogenized until a clear solution is formed.

This solution is then introduced into 1000 g of Iriodin^TO 103 (effect pearlescent pigment, from Merck KGaA). 17 g of an aqueous pigment composition Hydrocolor Gelb, Cl PY 83 (MK Chemicals) was incorporated into the resulting paste. Dry at 48 ° C for 48 hours

temperature 60 to 120 C in the oven. The result is a yellowish pearlescent pigment composition with excellent coloring properties. The composition thus obtained is granulated on a TR 01 granulation plate from Eirich. The coarse fraction of particles is separated on a 2 mm sieve. The fine fraction was collected on a 0.4 mm sieve. The granules thus prepared are resistant to abrasion and are compatible with conventional aqueous offset overprint varnish 350081 (Veilburger Lackfabrik).

Example 5

Dissolve 67 g of SMA^R-1440 F (from Elf-Atochem) in 590 g deionized water and in a solution of 29 g 2-amino-2-methyl-1-propanol (75¾ in water). After dissolving the resin fraction and adding 16 g of polyethylene glycol 2000 and homogenize the mixture until a clear solution is formed.

This solution is then introduced into 1000 g of Iriodin^R 103 (effect pearlescent pigment from Merck KGaA). 17 g of the aqueous pigment composition Hydrocolor Rot, Cl PR 146 (MK Chemicals) was incorporated into the resulting paste. It is dried in an oven at 60-120 ° C for 48 hours. The result is a reddish pearlescent pigmented pigment with excellent coloring properties. The composition thus obtained is granulated on a TR 01 granulation plate from Eirich. The coarse fraction of particles is separated on a 2 mm sieve. The fine fraction was collected on a 0.4 mm sieve. The granules thus prepared are resistant to abrasion and are compatible with the conventional aqueous offset overprint varnish 350081 (Weilburger Lackfabrik).

Example 6

Dissolve 67 g of SMA^R-1440 F (from Elf-Atochem) in 590 g deionized water and in a solution of 29 g 2-amino-2-methyl-1-propanol (75¾ in water). After dissolving the resin fraction and adding 16 g of polyethylene glycol 2000, the mixture is homogenized until a clear solution is formed.

This solution is then introduced into 1000 g of Iriodin^R 103. 17 g of an aqueous pigment composition Solcolor Blau, Cl PB 15 = 3 from MK Chemicals is incorporated into the resulting paste. The composition thus obtained is granulated on a TR 01 granulation plate from Eirich. Dry in a drying oven at 60 to 120 ° C for 48 hours. The result is bluish pearly shiny granules with excellent coloring properties. The coarse fraction of particles is separated on a 2 mm sieve. The fine fraction was collected on a 0.4 mm sieve. The granules thus prepared are abrasion-resistant and are compatible with Veilburger Lackfabrik 350081 aqueous offset overprint varnish.

Example 7

Dissolve 67 g of SMft^R-1440 F (from Elf-fltochem) in 590 g deionized water and in a solution of 29 g 2-amino-2-methyl-1-propanol (75% in water). After dissolving the resin fraction and adding 16 g of polyethylene glycol 2000, the mixture is homogenized until a clear solution is formed.

This solution is then introduced into 1000 g of Iriodin® 103. 17 g of an aqueous pigment composition Solcolor Griin (MK Chemicals) is incorporated into the resulting paste . The composition thus obtained is granulated on a TR 01 granulation plate from Eirich. Drying

hours at 60 to 120 ° C in an oven. The result is greenish pearlescent granules with excellent coloring properties. The coarse fraction of particles is separated on a 2 mm sieve. The fine fraction was collected on a 0.4 mm sieve. The granules thus prepared are resistant to abrasion and are compatible with conventional aqueous offset overprint varnish 350081 (Veilburger Lackfabrik).

Industrial applicability

Non-dusting, homogeneous, highly stable, easily dispersible pigment composition especially in the form of pastes and dry compositions for aqueous printing inks and for aqueous or solvent based coating systems, while being highly compatible with the other components of the system. Particularly suitable for coatings with an impressive pearl luster.