JP3090941B2 - Coating method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for forming a coating film for protecting the surface of a base such as an automobile body and imparting an aesthetic appearance.

<Conventional technology and problems to be solved> Conventionally, a solvent type coloring paint (base coat paint) containing a metallic pigment or the like is applied to the surface of a substrate of an automobile or the like on which a primer coating and an intermediate coating have been applied as necessary. And then apply a solvent type clear paint (top clear paint),
A method for forming a coating film by the 2C1B method or the 2C2B method is known.

In recent years, solvent-based paints have problems such as pollution due to solvent volatilization from the coating film or safety problems in paint storage,
As a base coat paint, for example, an aqueous paint described in, for example, JP-A-56-157358 has been studied.

However, the top clear paint still uses a solvent type paint, and the above-mentioned problems have not been sufficiently solved, and the application of a water-based paint to an object to be used outdoors such as an automobile is not suitable for weather resistance. The durability was not sufficient, and there was a problem in long-term durability.

In view of such circumstances, the present inventors have conducted intensive studies and as a result, have found a method of forming a coating film that has solved problems such as pollution of a solvent-type paint, problems such as safety, and problems such as weather resistance of a water-based paint,
The present invention has been made.

<Means for Solving the Problems> That is, the present invention provides a binder comprising internal crosslinked resin particles on a surface of an automobile body coated with a primer coating film and, if necessary, an intermediate coating film on the primer coating film. An aqueous colored base coat paint containing a coloring pigment is applied, and then an aqueous clear paint containing a fluorine-containing resin containing no hydroxyl group and / or hydrolyzable group directly bonded to a silicon atom as a binder is applied. And a method for forming a coating film.

 Hereinafter, the present invention will be described in detail.

The aqueous coloring paint used in the present invention contains a binder mainly composed of internally crosslinked resin particles, a coloring pigment and an aqueous medium as essential components, and further contains a surfactant, a thickener, an anti-sagging agent, and an ultraviolet ray, if necessary. It is made of a mixture of various additives such as an absorbent and a film-forming aid, a small amount of an organic solvent, a modified resin, an extender, a dye, a curing agent and the like.

The internal crosslinked resin particles include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, hexyl (meth) acrylate, ethylhexyl (meth) acrylate, nonyl (meth) acrylate, and lauryl. (Meth) acrylates such as (meth) acrylates,
Styrene or vinyl monomers having no functional groups such as vinyltoluene, substituted styrene such as methylstyrene, (meth) acrylonitrile, vinyl acetate, vinyl propionate, vinyl chloride, vinyl formate; (meth) acrylic acid, maleic anhydride, etc. Vinyl monomer having a carboxyl group, 2-hydroxyethyl (meth) acrylate,
It has a functional group such as a vinyl monomer having a hydroxyl group such as 2-hydroxypropyl (meth) acrylate, a vinyl monomer having an isocyanate group such as isocyanate ethyl (meth) acrylate, and a vinyl monomer having a glycidyl group such as glycidyl (meth) acrylate. Vinyl monomer; general formula [Here, R is an alkyl group or a hydrogen atom; the X - (CH _{2) m}
(CF ₂ ) _n R (where R is a hydrogen atom or a fluorine atom; m is 1
A compound represented by the general formula CF ₂ CFCF (CF ₂ ) _n COOH (where n is an integer of 0 to 8)
A compound represented by the formula: CF ₂ CCFO (CF ₂ ) _n COOH (where n is an integer of 0 to 8), and a fluorine-containing vinyl such as trifluoroethylene, chlorotrifluoroethylene, or tetrafluoroethylene. An average particle size of about 0.1 obtained by appropriately combining and polymerizing polymerizable unsaturated monomers such as monomers.
It is a polymer of 01 to 10 μm. The polymer is a monomer mixture selectively containing a combination of monomers having mutually reactive functional groups, for example, a vinyl monomer having a functional group of a combination of a carboxyl group and a glycidyl group, and a combination of a hydroxyl group and an isocyanate group for internal crosslinking. Or ethylene glycol di (meth) acrylate,
2 such as allyl (meth) acrylate and divinylbenzene
A method is employed in which a monomer having at least two or more polymerizable unsaturated groups is contained and polymerized.

The vinyl monomer having a functional group for internal crosslinking or a monomer having two or more polymerizable unsaturated groups is 0.2 to 10% by weight based on the total amount of the polymerizable unsaturated monomer.
Preferably, 0.5 to 3% by weight is suitable. In addition, if the amount is less than the above range, the durability and the like of the obtained coating film decrease, and if the amount is too large, the film forming property of the coating film deteriorates,
Smoothness and the like tend to decrease.

In the present invention, in order to improve weather resistance, a fluorine-containing vinyl monomer is preferably used as the monomer.
It is desirable that the content be contained in the total amount of the monomer of about 30% by weight.

As a method for producing the internally crosslinked resin particles, for example, a method of subjecting the monomer mixture to emulsion polymerization or dispersion polymerization by a known method in the presence of a polymerization initiator in an aqueous medium containing a dispersion stabilizer, a surfactant, and the like; The acid value of the monomer mixture in the solvent, preferably the obtained polymer is
As a typical method, a solution such as a mixture of about 30 to 120 is subjected to solution polymerization by a single-step method or a multi-step method by a well-known method, and water is added after neutralization, and the organic solvent is partially or wholly distilled off. However, the present invention is not limited to these methods. In order to stably disperse the internally crosslinked resin particles in an aqueous medium, a hydrophilic resin may be used in combination or encapsulated with a hydrophilic resin as described in JP-A-1-24870.

When the coloring pigment which is a component of the aqueous coloring paint is an inorganic pigment such as titanium dioxide, iron oxide, or carbon black, or an organic pigment such as phthalocyanine blue, quinacridone violet, or benzidine yellow, or a case in which a metallic coating is desired to have a metallic feeling. Typical examples thereof include scale pigments such as aluminum pigments, mica pigments, copper pigments, and graphite pigments. When an easily oxidizable pigment such as an aluminum pigment or a copper pigment is used, it is desirable to use an inhibitor such as a phosphoric acid ester or a surface treated with the same.

The aqueous medium which is a component of the aqueous coloring paint may be water alone, but a medium in which a small amount of a water-miscible organic solvent such as alcohol is used in combination can also be used.

The aqueous coloring paint used in the present invention comprises the above-mentioned component as an essential component and the above-mentioned third component as necessary, and is particularly soluble in or stably dispersed in an aqueous medium. It is desirable to blend a curing agent such as a resin and a blocked polyisocyanate, and to crosslink with a binder by baking at the time of forming a coating film.

In order to impart weather resistance, it is desirable to use a fluorine-containing resin used in a water-based clear paint described later in combination as the modified resin. When the fluorine-containing resin is used in combination,
As the constituent component of the polymerizable unsaturated monomer of the internally crosslinked resin particles, one containing 5 to 80% by weight of an alkyl ester of (meth) acrylic acid having 2 to 4 carbon atoms has good compatibility with the fluorine-containing resin, and as a result, This is preferable because a coating film having good sharpness can be obtained.

Incidentally, the aqueous coloring paint used in the present invention, the binder 10 ~
Solid content of about 15 to 50% by weight and 5 to 50% by weight of color pigment
60% by weight paint is suitable. However, when the flaky coloring pigment is used as the coloring pigment, the solid content is preferably about 15 to 30% by weight.

Next, the aqueous clear coating used in the present invention contains a binder having a fluorine-containing resin as a main component and an aqueous medium as essential components, and further contains various kinds of surfactants, film-forming aids, ultraviolet absorbers and the like as necessary. Additives, small amounts of organic solvents, modified resins, color pigments, dyes that do not impair the transparency of the resulting coating film,
It is composed of a compound containing an extender, a curing agent and the like.

The fluororesin is not particularly limited as long as it is stably dispersed in water, but typically, a resin obtained by the following method is suitable.

(A) An isocyanate group-containing vinyl monomer and a carboxyl group-containing vinyl monomer are added to a hydroxyl group-containing fluorine-containing resin in an organic solvent having no active hydrogen group described in Japanese Patent Application Nos. 2-147793 and 2-34562. A vinyl monomer component containing (or an amino group-containing vinyl monomer) or a copolymer of the vinyl monomer component is subjected to a grafting reaction, a carboxyl group (or an amino group) is introduced into the fluorine-containing resin, and after neutralizing it, A method of adding water to remove the organic solvent.

(B) A method of emulsion-polymerizing a vinyl monomer in the presence of a fluorine-containing resin having a hydrophilic side chain as described in JP-A-2-70706.

(C) A method in which a neutralized aqueous resin such as an acrylic resin, an alkyd resin, a polyester resin, or a polybutadiene resin having an acid value of about 30 to 120 and an acid value of about 30 to 120 is dispersed in water.

(D) A method of forcibly emulsifying a fluorine-containing resin.

As the fluorine-containing polymer before the aqueous conversion,
57-34107, JP-A-58-136605, JP-A-59-102961
No., JP-A-59-102962, JP-A-59-189108, JP-A-59-189108
Organic solvent-soluble compounds described in JP-A-60-67518, JP-A-61-57609, and JP-A-62-7767 are desirable.

Specifically, for example, it is composed of 30 to 70% by weight of fluoroolefin, 5 to 60% by weight of cyclohexyl vinyl ether, 3 to 50% by weight of alkyl vinyl ether, 3 to 20% by weight of hydroxyalkyl vinyl ether and 0 to 40% by weight of other vinyl monomers. Hydroxyl value of the copolymer is 10 to 120,
Those having an acid value of 0 to 20 and a number average molecular weight of 1,000 to 100,000 are suitable.

As commercially available, Lumiflon manufactured by Asahi Glass Co., Ltd.
LF100, LUMIFLON LF200, LUMIFLON LF210, LUMIFLON LF300, LUMIFLON LF400, LUMIFLON LF916; Dainippon Ink and Chemicals, Inc. -703, Fluonate K-70
4; Dianar LR-2504, manufactured by Mitsubishi Rayon Co., Ltd., and Dianar AR-2126; Cotax FX-68, Cotax FX-96, Cotax FX-145 manufactured by Toray Co., Ltd. are typical examples.

The grafted product and acrylic resin used in the above methods (a) to (c) contain 5 to 80% by weight of a (meth) acrylic acid alkyl ester having 2 to 4 carbon atoms as the constituent component.
Those containing are preferred because they have good compatibility with the fluorine-containing resin. The ratio of the fluororesin to the graft or the aqueous resin is suitably from 95/5 to 10/90 (weight basis).

As the aqueous medium which is a component of the aqueous clear coating composition of the present invention, the same aqueous medium as the aqueous coloring coating composition can be used.

Aqueous clear coating composition comprising the above-described components as essential components, and optionally the above-mentioned third component. Particularly, amino resins and blocked polyisocyanates which are soluble or stably dispersed in an aqueous medium. It is desirable that a curing agent such as the above is blended so as to be crosslinked with the binder by baking during the formation of the coating film.

In addition, about 10 to 40% by weight of solid content is suitable for the aqueous clear paint.

 Next, the method for forming a coating film of the present invention will be described.

After applying a primer coating or an intermediate coating as required on the surface of the substrate, the aqueous coloring paint is applied to a dry film thickness of about 10 to 30 μm by means of air spray, electrostatic spray or the like. Then, after setting so that the water content in the coating film is about 20% or less, an aqueous clear coating is applied by a similar coating means so as to have a dry film thickness of about 10 to 40 μm, and after setting, at 100 to 200 ° C. It is appropriate to bake and harden both coatings.

As a matter of course, it is also possible to apply a water-based clear paint and then bake and harden after applying a water-based coloring paint and curing by baking.

<Effect of the Invention> The coating film forming method of the present invention uses an aqueous paint for both the base coat paint and the top clear paint, so there are no pollution problems and safety problems due to organic solvents, and as a binder for the base coat paint. Excellent durability due to the use of internally crosslinked resin particles, and even if the top clear paint is applied over the uncured base coat by wet-on-wet, the base coat paint is formed by the organic solvent contained in the top clear paint. Less lubricating or flowing, therefore, even when a flaky metallic pigment is used, the fluidity of the flaky metallic pigment oriented in the base coat coating film can be prevented, and a coating film having a uniform metallic feeling can be obtained. .

In addition, since a fluorine-containing resin is used as a binder for the top clear coating, a coating film having good long-term weather resistance is obtained,
This is an unconventional coating film forming method.

Hereinafter, the present invention will be described in more detail with reference to Examples.
In the examples, “parts” and “%” are based on weight.

<Preparation of Aqueous Liquid A for Internally Crosslinked Resin Particles> 60 parts of water was added to a reaction vessel equipped with a stirrer, the inside of the vessel was replaced with nitrogen gas through nitrogen gas, and then 2 parts of sodium lauryl sulfate-based anionic surfactant and polyoxygen were added. 3 parts of an ethylene alkyl ether nonionic surfactant was added, and the temperature was raised to 70 ° C. while stirring.

Then, a mixture of 5 parts of methyl methacrylate and 0.05 part of azobisisobutyronitrile was added dropwise and reacted for 1 hour. Then, 6.16 parts of butyl acrylate and methyl methacrylate were added.
A mixture (a) of 10 parts, 1 part of allyl methacrylate and 0.17 part of azobisisobutyronitrile was dropped over about 1 hour. Further, 6 parts of butyl acrylate, 5 parts of methyl methacrylate, and 1.62 parts of hydroxyethyl methacrylate
Parts, acrylic acid 0.22 parts and azobisisobutyronitrile
0.13 parts of the mixture (b) was allowed to react dropwise over about 1 hour.
Next, the temperature was raised to 85 ° C., and the reaction was further performed for 3 hours to prepare an aqueous liquid A of internally crosslinked resin particles. The solid content of the obtained aqueous liquid was 38%, the acid value of the resin was 5, and the hydroxyl value was 20.

<Preparation of Aqueous Liquid B of Internal Crosslinked Resin Particles> In the preparation of the aqueous liquid A, allyl methacrylate 1
An aqueous liquid B of internally crosslinked resin particles was prepared in the same manner except that 0.8 part of glycidyl methacrylate and 0.4 part of methacrylic acid were used instead of parts.

The solid content of the obtained aqueous liquid was 38%, the acid value of the resin was 5, and the hydroxyl value was 20.

<Preparation of Aqueous Liquid C of Non-Internally Crosslinked Resin Particles> A non-inner crosslinked resin particle was prepared in the same manner as in preparing the aqueous liquid A except that 11 parts of methyl methacrylate was used instead of 1 part of allyl methacrylate and 10 parts of methyl methacrylate in the mixture (a). An aqueous liquid C of internally crosslinked resin particles was prepared.

The solid content of the obtained aqueous liquid was 38%, the acid value of the resin was 5, and the hydroxyl value was 20.

<Preparation of Aqueous Liquid D of Internal Crosslinked Resin Particles> Except for using 5 parts of allyl methacrylate and 6 parts of methyl methacrylate instead of 1 part of allyl methacrylate and 10 parts of methyl methacrylate in the mixture (a) in the preparation of the aqueous liquid A, Similarly, an aqueous liquid D of internally crosslinked resin particles was prepared.

The solid content of the obtained aqueous liquid was 38%, the acid value of the resin was 5, and the hydroxyl value was 20.

<Preparation of aqueous liquid E of internally crosslinked resin particles> 40 parts of water and 20 parts of n-butanol were added to a reaction vessel equipped with a stirrer, and the inside of the vessel was replaced with nitrogen gas through nitrogen gas. 2 parts of nonionic surfactant were added, and the temperature was raised to 70 ° C. while stirring.

Then, a mixture of 2.5 parts of allyl methacrylate, 5 parts of butyl acrylate, 15 parts of methyl methacrylate, 5 parts of 2- (perfluorooctyl) ethyl acrylate and 0.3 part of 50% benzoyl peroxide paste was dropped over about 2 hours. Further, a mixture of 5 parts of butyl acrylate, 5 parts of methyl methacrylate, 2.5 parts of acrylic acid and 0.15 part of 50% benzoyl peroxide paste was added to about 1 part.
The reaction was allowed to proceed dropwise over a period of time. Next, the temperature was raised to 80 ° C., and the reaction was further performed for 3 hours. After cooling, the pH was adjusted to 8.0 with dimethylethylamine to prepare an aqueous liquid E of internally crosslinked resin particles. The solid content of the obtained aqueous liquid was 40%, and the acid value was 48.5.

<Preparation of Fluorinated Resin Aqueous Solution F> A monomer comprising 55.2% of chlorotrifluoroethylene, 20% of cyclohexyl vinyl ether, 15% of ethyl vinyl ether and 9.8% of hydroxybutyl vinyl ether was contained according to the method described in JP-A-57-34107. A 60% methyl ethyl ketone solution of a fluorine copolymer (hydroxyl value 28.3, Tg 45 ° C) was prepared.

6.2 parts of 2-methacryloyloxyethyl isocyanate was added dropwise to 100 parts of the solution while stirring.
Then, a mixture of 5.4 parts of butyl acrylate, 6 parts of methacrylic acid and 0.1 part of 50% benzoyl peroxide paste was dropped and reacted over about 1 hour, and further reacted for 4 hours. After cooling, 6.4 parts of dimethylethylamine was added to neutralize. Then, while dropping 200 parts of water, the temperature was raised to the azeotropic temperature of methyl ethyl ketone, and the azeotrope of methyl ethyl ketone / water was removed by distillation, and the phase was changed from a solvent system to an aqueous system, and a fluororesin aqueous liquid was obtained. F was prepared. The solid content of the obtained aqueous liquid is 50%, the acid value of the resin is 60, and the hydroxyl value is 5.
It was 6.

<Preparation of Fluorine-Containing Aqueous Liquid G> Methyl ethyl ketone 10 was placed in a reaction vessel equipped with a stirring device.
After adding 0 parts and raising the temperature to 70 ° C., a mixture of 11 parts of methyl methacrylate, 80 parts of n-butyl methacrylate, 2 parts of tert-butyl methacrylate, 7 parts of hydroxyethyl methacrylate and 1.5 parts of azobisisobutyronitrile was added. The reaction was added dropwise over about 2 hours, and 0.5 part of azobisisobutyronitrile was further added.
A 0% acrylic copolymer (having a hydroxyl value of 30) solution was prepared.

To a mixture of 50 parts of the acrylic copolymer solution and 50 parts of a 60% methyl ethyl ketone solution of the fluorinated copolymer used in the aqueous solution F, 3 parts of 2-methacryloyloxyethyl isocyanate was added dropwise with stirring and reacted. . Then 70
The mixture was kept at a temperature of 6 ° C., and a mixture of 6 parts of butyl acrylate, 3.5 parts of acrylic acid and 0.1 part of 50% benzoyl peroxide paste was reacted dropwise over 1 hour. After further reacting for 4 hours, 4.5 parts of dimethylethylamine was added to neutralize.

Then, while dropping 200 parts of water, the temperature was raised to the azeotropic temperature of methyl ethyl ketone, and the azeotrope of methyl ethyl ketone / water was removed by distillation, and the phase was changed from a solvent system to an aqueous system,
A fluororesin aqueous liquid G having a solid content of 40% and methyl ethyl ketone remaining at 10% was prepared.

<Preparation of Fluororesin Resin Aqueous Solution H> A solid content was prepared in the same manner as in the above-mentioned method of preparing the acrylic copolymer solution except that 21.4 parts of methyl methacrylate, 59.1 parts of isobutyl methacrylate, 7.5 parts of acrylic acid, and 12 parts of hydroxyethyl methacrylate were used. A 50% acrylic copolymer (having a hydroxyl value of 51.6 and an acid value of 58) was prepared.

A mixture of 90 parts of the acrylic copolymer solution and 10 parts of a 60% methyl ethyl ketone solution of the fluorinated copolymer was neutralized with 3 parts of dimethylethylamine, and a 60% n-butanol solution of n-butyl etherified melamine resin was added to 28 parts. And then dissolved uniformly.

Then, the organic solvent was removed under reduced pressure to a residual amount of 10 parts, and then 96.2 parts of water was added and emulsified to prepare a fluororesin aqueous liquid H having a solid content of 40%.

<Preparation of Fluororesin Resin Aqueous Solution I> A blocked polyisocyanate compound [“Coronate DC” was added to the grafted fluorinated copolymer solution before dimethylethylamine neutralization in the preparation of the fluorinated resin aqueous solution F.
2725 "(trade name, manufactured by Nippon Polyurethane Co., Ltd.)], except that 3.3 parts of] were added.
Was prepared.

<Preparation of Acrylic Resin Aqueous Liquid J> 100 parts of water was added to a reaction vessel equipped with a stirrer, and the inside of the vessel was replaced with nitrogen gas through nitrogen gas. Then, 2 parts of sodium lauryl sulfate-based anionic surfactant and polyoxyethylene alkyl were added. Two parts of an ether-based nonionic surfactant were added, and the temperature was raised to 70 ° C. with stirring.

Then, a mixture of 5 parts of methyl methacrylate and 0.5 part of azobisisobutyronitrile was allowed to react dropwise over about 1 hour, and further 8 parts of methyl methacrylate, 61.5 parts of n-butyl methacrylate, and 7 parts of hydroxyethyl methacrylate 7
Parts, 3.5 parts of acrylic acid, 15 parts of styrene and 1.5 parts of azobisisobutyronitrile were allowed to react dropwise over about 2 hours, and further reacted for 4 hours to prepare an acrylic resin aqueous liquid J having a solid content of 50%.

<Preparation of Aluminum Pigment Dispersion K> 60 parts of non-leafing type flaky aluminum pigment containing mineral spirit and solvent naphtha as volatile components having an average particle diameter of 27 μm, a solid content of 65%, a nonionic surfactant 2 parts, and isopropyl alcohol 13 parts and 25 parts of water were added with stirring to prepare an aluminum dispersion K.

<Preparation of Mica Pigment Dispersion L> 5 parts of a polycarboxylic acid thickener and 35 parts of water were added to 60 parts of a scaly mica pigment (“Iriodin 101S” (trade name, manufactured by Merck, Japan)) with stirring, A mica pigment dispersion liquid L was prepared.

<Preparation of Blue Pigment Dispersion M> 3 parts of phthalocyanine bull, 3 parts of nonionic surfactant,
30 parts of hexamethylol methoxy melamine and 64 parts of water were mixed to prepare a blue pigment dispersion M.

<Preparation of White Pigment Dispersion N> A white pigment dispersion N was prepared by mixing 60 parts of titanium white, 2 parts of nonionic surfactant, 15 parts of hexamethylolmethoxymelamine and 23 parts of water.

<Preparation of water-based coloring paints a to f and water-based clear coatings s to z> The water-based coloring paints a to f and the water-based clear coatings s to z were uniformly mixed with the formulations shown in Tables 1 and 2, respectively.
Prepared.

Examples 1 to 7 and Comparative Examples 1 and 2 An aqueous coloring paint was applied by air spray on the surface of the aluminum plate to which the primer was applied, and after setting, an aqueous clear paint was applied by air spray and baked and cured.

The paint used and the coating conditions are as shown in Table 3.

The resulting coated plate was tested for coating film appearance, gloss, water resistance, and weather resistance. The results are shown in the lower part of Table 3.

As is evident from Table 3, the coating film obtained by the method of the present invention had good appearance, water resistance and weather resistance.

On the other hand, in Comparative Example 1 in which the internal crosslinked resin particles were not used as the aqueous coloring paint and the ordinary resin particles were used as a binder, when the aqueous clear coating was applied, the flaky aluminum pigment flowed, and a uniform metallic feeling was obtained. It was not obtained and had a blackish and uneven appearance.

Further, in Comparative Example 2 in which no fluorine-containing resin was used as a binder as an aqueous clear coating, the weather resistance was poor.

Continuation of the front page (56) References JP-A-2-233181 (JP, A) JP-A-2-104698 (JP, A) JP-A-2-14776 (JP, A) JP-A-1-9734 (JP) JP-A-1-27670 (JP, A) JP-A-64-34472 (JP, A) JP-A-56-30456 (JP, A) JP-A-63-156572 (JP, A) 2-48188 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B05D 7/14 B05D 1/36 B05D 5/06 101 B05D 7/24 301 B05D 7/24 302 B32B 15 / 00-15/20

Claims (2)

(57) [Claims] An aqueous colored base coat paint containing a binder composed of internally crosslinked resin particles and a color pigment is coated on the surface of an automobile body having a primer coating film and, if necessary, an intermediate coating film on the primer coating film. A method for forming a coating film, comprising applying, and then applying an aqueous clear coating material containing a fluorine-containing resin having no hydroxyl group and / or hydrolyzable group directly bonded to a silicon atom as a binder. 2. The method according to claim 1, wherein the color pigment is a flaky color pigment.