JP2002121494A - Brilliant coating composition, method for forming coating film and coated product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brilliant coating composition capable of giving coating film affording high chromatic feeling at the shade part, emphasized in the interference color difference between the highlight part and the shade part, capable of manifesting polychromatic design, and affording further sophisticated brilliant feeling, to provide a method for forming such a coating film, and to provide products coated with the composition. SOLUTION: This brilliant coating composition comprises a vehicle, an interferential mica pigment and a multiple oxide-baked pigment; wherein the hue of the interference color of the interferential mica pigment is set at hue 0 in the Munsell color system, and when represented at counterclockwise +50 and clockwise -50 based on the Munsell hue circle 100, the hue H of the interference color of the multiple oxide-baked pigment is +30 to +50 or -30 to -50. The 2nd objective method for forming such a coating film using the composition is provided. The other objective coated products using the method are also provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brilliant coating composition, a method for forming a coating film, and a coated product coated by this method.

[0002]

2. Description of the Related Art In a field requiring a high design such as an automobile body, a coating film using a brilliant paint composition containing a brilliant material is required. As one of them, a metal oxide-coated alumina flake pigment is known. JP-A-2000-86944 discloses a glitter coating composition containing a vehicle, a baked composite oxide pigment and a glitter pigment. Here, interference mica pigments are described as glitter pigments, but there is a problem that a coating film exhibiting sufficient polychromaticity cannot be obtained by simply using them together.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to obtain a high chroma feeling in a shade portion, and to enhance a color difference of an interference color between a highlight portion and a shade portion, so that a multicolored design can be exhibited. It is another object of the present invention to provide a glitter coating composition, a coating film forming method, and a coated article capable of forming a coating film that gives a higher-grade glitter.

[0004]

Means for Solving the Problems The present inventors have conducted intensive studies in view of the above-mentioned problems, and as a result, have reached the present invention. 1. A paint composition containing a vehicle, an interference brilliant pigment and a baked composite oxide pigment, wherein the interference hues of the interference brilliant pigment are set to hue 0 in a Munsell display system, and the counterclockwise direction is +50 with respect to the Munsell hue circle 100. , Clockwise -5
0, the interference color hue H of the composite oxide fired pigment
Has a hue range of +30 to +50, or -30 to -50. 2. The interference color hue H of the fired composite oxide pigment is +35.
The above-mentioned brilliant coating composition having a hue range of from +50 to +50 or from -35 to +50. 3. The glitter coating composition, wherein the mass ratio of the interference glitter pigment to the composite oxide fired pigment is 90/10 to 10/90. 4. The above glittering paint composition, wherein the interference glittering pigment is any one of a metal oxide-coated mica pigment, a metal oxide-coated alumina flake pigment, a metal oxide-coated silica flake pigment, and a metal oxide-coated glass flake pigment. object. 5. A method for forming a coating film in which a base coat layer is formed on a substrate using the above-mentioned glitter coating composition, and then a top coat layer is formed using a clear paint. 6. The above-mentioned coating film forming method, wherein the clear coating contains a carboxyl group-containing polymer and an epoxy group-containing polymer. 7. A coated article to be coated by the above-mentioned coating film forming method.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail.

Glitter paint composition The glitter paint composition of the present invention is a paint composition containing a vehicle, an interference glitter pigment and a fired composite oxide pigment, and has an interference color hue of the interference glitter pigment. The hue in the Munsell display system is set to 0, and the Munsell hue circle 100 is
A paint in which the interference color hue H of the composite oxide fired pigment is in the hue range of +30 to +50, or -30 to -50 when indicated by +50 on the left and -50 on the right.

Interference brilliant pigment The interference brilliant pigment is any one of a metal oxide-coated mica pigment, a metal oxide-coated alumina flake pigment, a metal oxide-coated silica flake pigment, and a metal oxide-coated glass flake pigment. is there.

The above metal oxide-coated mica pigment is an interference mica pigment obtained by coating a thin film of titanium dioxide, iron oxide or a metal oxide such as chromium, cobalt, tin, zirconium, etc. on the surface of natural muscovite or synthetic mica. It is. Such interference mica pigments have a particle size range of 1 to 60.
μm, preferably 1 to 40 μm, and the average particle size is 15 to 2
A 5 μm scale can be used. The average particle size in the present invention means the average particle size of the major axis. The metal oxide-coated alumina flake pigment has a surface of aluminum oxide (A1 ₂ O ₃ ) coated with Fe ₂ O ₃ , TiO ₂ , Sn.
It is coated with a metal oxide such as O ₂ or ZrO ₂ and has an average particle size of 3 to 60 μm, preferably 5 to 30 μm, and a thickness of 0.1 to 0.8 μm, preferably 0.2 to 0.4 μm.
belongs to. In addition, the surface smoothness is high and the particle size distribution is sharp, so that scattering due to reflected light can be reduced. Furthermore, aspect ratio (particle diameter / thickness)
When the surface of a flaky alumina flake pigment having a particle size of 20 or more is coated with a metal oxide, a pigment exhibiting a pearly (pearl luster) is obtained. In both cases, they exhibit a strong shine that cannot be obtained with conventional mica powder, and can express a three-dimensional impression with transparency.

On the other hand, the metal oxide-coated silica flake pigment is obtained by coating a substrate made of flake silica (silicon dioxide) with a metal oxide different from the metal oxide of the substrate. Examples of the metal oxide coated here include iron oxide (iron monoxide, diiron trioxide, hematite) and titanium dioxide (anatase type or rutile type).
The thickness of the metal oxide coating layer is preferably from 50 to 200 nm, more preferably from 60 to 180 nm.

Further, the metal oxide-coated glass flake pigment is a brilliant pigment in which the surface of glass flake is coated with titanium oxide. The metal oxide-coated glass flake pigment has an average particle size in a state where the metal oxide is coated, preferably 10 to 80 μm, more preferably 10 to 80 μm.
60 μm. When the average particle diameter is less than 10 μm, it is difficult to exhibit a brilliant effect exhibiting the interference color effect.
If it is more than μm, the appearance of the coating film is poor. The thickness is 0.1 ~
It is 10 μm, preferably 0.1-5 μm. When the thickness is less than 0.1 μm, an excessive share is applied at the time of coating circulation, and the glittering pigment is deformed or broken, causing a problem that the coating is discolored with time. Might be. The content of the metal oxide-coated flake pigment in the glitter coating composition (the ratio of the solid content of the pigment to 100 parts by weight of the solid content of the coating: PWC) is preferably 0.01% to 30%, and more preferably 1% to 30%.
% To 15% is more preferable. If it is less than 0.01%, it is difficult to exhibit a brilliant feeling exhibiting an interference color effect, and
If it exceeds 300, the coating film appearance may be deteriorated. The color of the interference brilliant pigment can be obtained in a desired color by adjusting the type and amount (coating thickness) of the metal oxide to be coated.

The calcined composite oxide pigment is a calcined pigment composed of a composite of a metal oxide composed of two or more elements. Here, as the two or more elements, (a) Co, Ni,
Fe, Mn, Cu, Cr, etc. are essential, and in addition to these, (b) Ti, Sb, As, Bi, etc., which develop colors depending on conditions, and (c) Al, Si, Ca, Mg,
A desired calcined pigment can be obtained by combining Ba and the like and changing the mixing ratio of these. These calcined pigments are in the form of a solid solution obtained by heat-treating a metal oxide composed of the above-mentioned elements and thermally diffusing, and are obtained by pulverizing coarse particles into a desired particle size after calcining. Average particle size is 0.1-50
μm is preferred, more preferably 0.5 to 5 μm, and still more preferably 0.5 to 2 μm. Hereinafter, the relationship between the metal oxide component and the coloring will be exemplified. Green type: TiO ₂ —CoO—NiO—ZnO, etc. Yellow type: TiO ₂ —BaO—NiO, TiO ₂ —Sb ₂ O ₃
-NiO like blue: CoO-Al ₂ O _3, etc. Brown color _{system: ZnO-Fe 2 O 3,} NiO-Fe 2 O 3 -
Al ₂ O _3, and the like blackish: As such the composite oxide calcined pigment _{CuO-Fe 2 O 3 -Mn 2} O 3, for example, sold by Dainichiseika Color & Chemicals Mfg., "Die Piroki Side Color"
(Product name) and the like. Content of burnt composite oxide pigment in glittering coating composition (PWC%)
Is preferably 0.01 to 20%. If it exceeds 20%, the appearance of the coating film will be reduced, and if it is less than 0.01%, the solid brightness will decrease. More preferably, it is 0.1 to 15%.

[0012] The calcined pigment of the composite oxide has a lower tinting strength than ordinary coloring pigments, but when used in combination with the above-mentioned interference brilliant pigment, a strong color retention and a high color saturation at the shade portion can be obtained. Is good, and a coating film exhibiting solid luster is obtained with high chroma even in the highlight portion, and a bright and vivid impression can be expressed as an appearance.

The above-mentioned fired composite oxide pigment has the following relationship with the above-mentioned interference brilliant pigment with respect to the interference color hue. That is, the interference color hue of the interference brilliant pigment is set to hue 0 in the Munsell display system, and
On the other hand, when it is displayed with the counterclockwise rotation +50 and clockwise rotation -50,
The interference color hue H of the composite oxide fired pigment is +30 to +
It is set to a hue range of 50 or -30 to -50, preferably to a hue range of +35 to +50 or -35 to +50. By setting in this range, a high chroma feeling can be obtained in the shade portion, and the color difference between the interference colors in the highlight portion and the shade portion is emphasized, and a more luxurious feeling can be exhibited that can exhibit a multicolored design. It is possible to form a coating film that gives a brilliant feeling.

In the glittering coating composition of the present invention, the mass ratio of the interference glittering pigment to the composite oxide fired pigment is preferably 90/10 to 10/90, more preferably 80/20 to 10/90. 20/80. The above ratio is 9
If it exceeds 0/10, the polychromaticity decreases, and if it falls below 10/90, the glitter becomes insufficient.

The total content (PWC) of the interference luster pigment and the calcined composite oxide pigment is preferably less than 25%, more preferably less than 20%. If it exceeds 25%, the appearance of the coating film deteriorates.

Other brilliant pigments The brilliant coating composition of the present invention contains, as the other brilliant pigments other than the above-mentioned interference brilliant pigment and the above-mentioned composite oxide fired pigment, those conventionally used in paints. can do. Examples of such a material include aluminum flake, metal titanium flake, stainless flake, plate-like iron oxide, phthalocyanine flake, and metal-plated glass flake. The other brilliant pigments may be contained in an amount that does not impair the effects of the interference brilliant pigments and the fired composite oxide pigment.

Color pigment The glitter coating composition of the present invention may further contain a color pigment. Examples of such pigments include those conventionally used in paints.For example, organic pigments include, for example, azo lake pigments, phthalocyanine pigments, indico pigments, berylen pigments, quinophthalone pigments, Examples include dioxazine-based pigments, quinacridone-based pigments, isoindolinone-based pigments, metal complex pigments, and the like, and examples of inorganic pigments include, for example, graphite, yellow iron oxide, red iron oxide, titanium dioxide, and carbon black. The amount of the color pigment to be added can be arbitrarily set as long as the effects of the interference brilliant pigment and the calcined composite oxide pigment are not hindered.
Is preferably set according to a color that is 50 or less. Also, various extender pigments and the like can be used in combination. The total content (PWC) of all the pigments is 5
It is preferably less than 0%, more preferably less than 30%. 50
%, The appearance of the coating film deteriorates.

Vehicle The vehicle contained in the glittering coating composition of the present invention is a dispersion of the above-described interference glittering pigment and the baked composite oxide pigment, and is optionally crosslinked with a resin for forming a coating film. And an agent.

Examples of the coating film forming resin constituting the vehicle include (a) an acrylic resin, (b) a polyester resin, (c) an alkyd resin, (d) a fluororesin,
(E) epoxy resin, (f) polyurethane resin, (g)
Polyether resins and the like are mentioned, and acrylic resins and polyester resins are particularly preferably used. These can be used in combination of two or more. In addition, the resin for forming a coating film includes a curable type and a lacquer type, and usually, a curable type is used. In the case of a type having curability, it is used by being mixed with a cross-linking agent such as an amino resin or a (block) polyisocyanate compound, an amine-based, a polyamide-based, or a polyvalent carboxylic acid. Let it proceed. It is also possible to use a non-curable type coating film forming resin in combination with a curable type.

(A) Acrylic resin Examples of the acrylic resin include a copolymer of an acrylic monomer and another ethylenically unsaturated monomer. Acrylic monomers that can be used for the copolymerization include methyl, ethyl, propyl, n-butyl, i-butyl, t-butyl, acrylic acid or methacrylic acid.
2-ethylhexyl, lauryl, phenyl, benzyl,
Examples include esterified products such as 2-hydroxyethyl and 2-hydroxypropyl, ring-opened adducts of caprolactone of acrylic acid or 2-hydroxyethyl methacrylate, acrylamide, methacrylamide and N-methylolacrylamide. Other ethylenically unsaturated monomers copolymerizable therewith include styrene, α-methylstyrene, itaconic acid, maleic acid, vinyl acetate and the like.

(B) Polyester Resin Examples of the polyester resin include saturated polyester resins and unsaturated polyester resins, and examples thereof include condensates obtained by heating and condensing a polybasic acid and a polyhydric alcohol. Examples of the polybasic acids include saturated polybasic acids and unsaturated polybasic acids. Examples of the saturated polybasic acids include phthalic anhydride, terephthalic acid, and succinic acid. Examples of the acid include maleic acid, maleic anhydride, fumaric acid and the like. Examples of polyhydric alcohols include dihydric alcohols and trihydric alcohols. Examples of dihydric alcohols include ethylene glycol and diethylene glycol. Examples of trihydric alcohols include glycerin and trimethylolpropane. And the like.

(C) Alkyd Resins The alkyd resins include the above-mentioned polybasic acids and polyhydric alcohols, as well as fats and oils and fatty acids (soybean oil, linseed oil, coconut oil, stearic acid, etc.), and natural resins (rosin, succinate, etc.). An alkyd resin obtained by reacting and denaturing a denaturing agent such as) can be used.

(D) Fluororesin The fluororesin may be any one of vinylidene fluoride resin and ethylene tetrafluoride resin or a mixture thereof, a fluoroolefin and a hydroxy group-containing polymerizable compound, and other copolymerizable compounds. Examples include resins made of various fluorine-based copolymers obtained by copolymerizing monomers made of a vinyl-based compound.

(E) Epoxy Resin Examples of the epoxy resin include resins obtained by a reaction between bisphenol and epichlorohydrin. Examples of the bisphenol include bisphenol A and F. Examples of the bisphenol type epoxy resin include, for example, Epicoat 828, Epicoat 1001, Epicoat 1004, Epicoat 10
07 and Epicoat 1009 (both manufactured by Shell Chemical Co., Ltd.), and those obtained by chain-extending these with an appropriate chain extender can also be used.

(F) Polyurethane Resin Examples of the polyurethane resin include resins having a urethane bond obtained by various polyol components such as acryl, polyester, polyether and polycarbonate and a polyisocyanate compound. Examples of the polyisocyanate compound include 2,4-tolylene diisocyanate (2,4-TDI), 2,6-tolylene diisocyanate (2,6-TDI), and a mixture thereof (TDI), diphenylmethane-4,4 ′. -Diisocyanate (4,4'-MDI), diphenylmethane-
2,4′-diisocyanate (2,4′-MDI), and a mixture thereof (MDI), naphthalene-1,5-diisocyanate (NDI), 3,3′-dimethyl-4,
4'-biphenylene diisocyanate (TODI), xylylene diisocyanate (XDI), dicyclohexylmethane diisocyanate (hydrogenated HDI), isophorone diisocyanate (IPDI), hexamethylene diisocyanate (HDI), hydrogenated xylylene diisocyanate (HXDI), etc. Can be mentioned.

(G) Polyether Resin The above polyether resin is a polymer or copolymer having an ether bond, such as polyoxyethylene polyether, polyoxypropylene polyether, polyoxybutylene polyether or A polyether resin having at least two hydroxyl groups per molecule, such as a polyether derived from an aromatic polyhydroxy compound such as bisphenol A or bisphenol F, or the above polyether resin and succinic acid, adipic acid, sebacic acid , Phthalic acid, isophthalic acid, terephthalic acid, polycarboxylic acids such as trimellitic acid, or
Examples thereof include carboxyl group-containing polyether resins obtained by reacting these with a reactive derivative such as an acid anhydride.

When the vehicle contains a cross-linking agent, the ratio of the resin for forming a film to the cross-linking agent is 90 to 50% by mass and the content of the cross-linking agent is 10 to 50% by mass in terms of solid content. Yes, preferably 85 to 60% by mass of the resin for forming the coating film and 15 to 40% by mass of the crosslinking agent. If the amount of the crosslinking agent is less than 10% by mass (the amount of the resin for forming a coating film exceeds 90% by mass), the crosslinking in the coating film is not sufficient. On the other hand, when the cross-linking agent exceeds 50% by mass (when the resin for forming a coating film is less than 50% by mass), the storage stability of the coating composition is reduced and the curing speed is increased.

Ingredients Other than the Above The glitter coating composition of the present invention may further comprise, in addition to the above components, a polyamide wax which is a lubricating dispersion of an aliphatic amide and a polyethylene wax which is a colloidal dispersion mainly composed of polyethylene oxide. Anti-settling agents, curing catalysts, UV absorbers, antioxidants, leveling agents, surface conditioners such as silicon and organic polymers, anti-sagging agents, thickeners, defoamers, lubricants,
Crosslinkable polymer particles (microgel) and the like can be appropriately added. These additives are usually used in the vehicle 10 described above.
By blending at a ratio of 15 parts by mass or less with respect to 0 parts by mass (based on solid content), the performance of a paint or a coating film can be improved.

The glitter coating composition of the present invention is usually provided in a form in which the above-mentioned constituents are dissolved or dispersed in a solvent. Any solvent may be used as long as it dissolves or disperses the vehicle, and an organic solvent and / or water may be used. Examples of the organic solvent include those commonly used in the field of coatings. Examples thereof include hydrocarbons such as toluene and xylene, ketones such as acetone and methyl ether ketone, esters such as ethyl acetate, cellosolve acetate, and butyl cellosolve, and alcohols. When the use of an organic solvent is regulated from the viewpoint of the environment, it is preferable to use water. In this case, an appropriate amount of a hydrophilic organic solvent may be contained.

The coating film forming method of the present invention is obtained by coating the above-mentioned glitter coating composition on a substrate to form a glitter coating film as a base coat layer, and then obtaining the glitter coating film. At least one clear coating is applied as a top coat layer on the glittering coating film to form a top coat layer.

The above-mentioned base material is not limited, and metals such as iron, aluminum, copper and alloys thereof; inorganic materials such as glass, cement and concrete; polyethylene resin, polypropylene resin, ethylene-vinyl acetate Copolymer resin, polyamide resin, acrylic resin,
Examples include resins such as vinylidene chloride resin, polycarbonate resin, polyurethane resin and epoxy resin, and plastic materials such as various FRPs; natural and synthetic materials such as wood and fiber materials (paper, cloth, etc.).

In the coating film forming method of the present invention, the glitter coating composition of the present invention is applied to the above-mentioned substrate directly or via an undercoating film. When the object is an automobile body or a part, it is preferable to previously apply undercoating, intermediate coating, or the like by chemical conversion treatment, electrodeposition coating, or the like. The intermediate coating is performed for concealing the base, imparting chipping resistance, and ensuring adhesion with the top coat, and forms a coating film using the intermediate coating.

In the method for forming a coating film of the present invention, first, the above-mentioned glittering coating composition is applied as a base coat layer on the above-mentioned substrate.

In the case where the base material is one coated with a base coat, an intermediate coat, or the like, a base coat is applied on the base coat by a wet-on-wet (W / W) method or a wet-on-dry (W / D) method. The luster coating composition can be applied by a method. The W / W method is a method in which a base coat is applied, then dried by air drying or the like, and applied to an uncured or semi-cured base coat.
The method is a method in which a base coat is baked and applied to a cured base coat.

The method of applying the glitter coating composition on the substrate is not particularly limited, but a spray method, a roll coater method and the like are preferable, and the coating can be performed a plurality of times. The dry film thickness of the base coat layer coated with the glitter coating composition is preferably 5 to 50 μm per coat,
10-30 micrometers is more preferable.

On the base coat layer thus formed, at least one clear coating film is formed as a top coat layer. When there are many glittering pigments in the base coat layer, the glossiness of the surface can be improved by applying two or more clear paints.

As the clear paint used in the coating film forming method of the present invention, those which are generally used for overcoating can be used. For example, acrylic resin, polyester resin, fluorine resin, epoxy resin, polyurethane resin, A mixture of at least one thermosetting resin selected from polyether resins and modified resins thereof and the above-mentioned crosslinking agent can be used.
When a clear paint containing a carboxyl group-containing polymer and an epoxy group-containing polymer described in US Pat. No. 19315 is coated with a coating having a large difference in solubility between the base coating layer and the acid rain resistance and W / W method, It is preferably used from the viewpoint of not disturbing the orientation of the glitter in the base coat layer. In addition, these clear paints, if necessary, as long as the transparency is not impaired, a coloring pigment, an extender, a modifier, an ultraviolet absorber, a leveling agent,
Additives such as dispersants and defoamers can be blended.

The application of the clear paint on the coating film of the present invention can be carried out after simultaneously curing the above-mentioned base coat layer and, if necessary, the layer formed from the intermediate paint. It is preferable to use the W / W method described above for the semi-cured base coat layer. In the case of applying the clear paint a plurality of times, the clear paint may be applied and baked at the same time after the final clear paint is applied. Thus, using the clear paint, W
/ W method together with the base coat layer and, if necessary,
It is baked at 60 ° C. for a predetermined time to obtain a coating film. The dry thickness of the top coat layer is preferably from 10 to 80 μm per coat, more preferably from 20 to 50 μm.

Coated product The coated product of the present invention is obtained by forming a glittering coating film as a base coat layer on a substrate by the above-mentioned coating film forming method, and then applying a top coating on the glittering coating film thus obtained. At least one clear top coat layer is formed as a coat layer. The above-mentioned painted material can obtain a high chroma feeling in the shade portion, and the color difference of the interference color is emphasized in the highlight portion and the shade portion, and a multicolored design can be expressed.
It has a more luxurious glitter.

[0040]

EXAMPLES Next, the present invention will be described more specifically with reference to examples and comparative examples, but the present invention is not limited to these examples. In addition, the compounding amount represents a mass part unless there is particular notice.

Preparation of base materials in Examples 1 to 6 and Comparative Examples 1 to 2 A dull steel plate (length 300 mm, width 100 mm and thickness 0.8 mm) was treated with a zinc phosphate treating agent ("Surfdyne SD2").
000 "(manufactured by Nippon Paint Co., Ltd.), and then a cationic electrodeposition paint (" Power Top U-50 ", manufactured by Nippon Paint Co., Ltd.) was electrodeposited so as to have a dry film thickness of 25 [mu] m. Then, after baking at 160 ° C. for 30 minutes, an intermediate coating (“Olga S-90 Sealer Gray”,
(Nippon Paint Co., Ltd.) was applied by air spray coating so as to have a dry film thickness of 40 μm, and baked at 140 ° C. for 30 minutes to form an intermediate coating film, which was used as a substrate.

Preparation of glitter coating composition Acrylic resin (styrene / methyl methacrylate / ethyl methacrylate / hydroxyethyl methacrylate /
Methacrylic acid copolymer, number average molecular weight about 20,000,
A hydroxyl value of 45, an acid value of 15, and a solid content of 50% by mass, and a melamine resin (trade name, “Uban 20SE”, manufactured by Mitsui Chemicals, Inc., solid content of 60% by mass) are blended at a solid content mass ratio of 80:20. To the vehicle obtained in this manner, an interference glittering pigment, a baked composite oxide pigment, and if necessary, other glittering pigments and coloring pigments were blended in the types and ratios shown in Table 1.
Next, an organic solvent (toluene / xylene / ethyl acetate /
(Butyl acetate mass ratio = 70/15/10/5) and the mixture was stirred and mixed by a stirrer so as to obtain an appropriate coating viscosity, thereby preparing a glittering coating composition.

Formation of a glitter coating film The glitter coating composition obtained above was coated on the surface to be coated of the above-mentioned substrate so that the dry film thickness became 15 μm. Coating was performed using an electrostatic coating machine (“Auto REA”, manufactured by ABB Industries) at an atomization pressure of 2.8 kg / cm ² . The atmosphere in the booth during coating was maintained at a temperature of 25 ° C. and a humidity of 75%. After the coating, the coating was set for 3 minutes, the clear coating was applied to a dry film thickness of 35 μm, set at room temperature for 10 minutes, and baked at a temperature of 140 ° C. for 30 minutes.
High chroma and polychromaticity were evaluated by the following evaluation method in the shade portion of the obtained coating film, and the results are shown in Table 1. The clear paint used was acrylic / melamine resin clear paint 1
(“Super Lac O-130 Clear”, manufactured by Nippon Paint Co., Ltd.) or clear paint 2 containing a carboxyl group-containing polymer and an epoxy group-containing polymer (“Macflow O-520 Clear”, manufactured by Nippon Paint Co., Ltd.) Kind. Table 1 shows the evaluation results.

Evaluation method : High chroma feeling in shade area: 3: High chroma feeling is remarkable 2: High chroma feeling 1: No high chroma feeling Polychromaticity: When the test plate is viewed almost from the front (highlight part) It was visually evaluated whether or not the hue was different between when the test plate was viewed obliquely (shaded portion). 3: noticeably different hue 2 ... slightly different hue 1 ... hue does not change

[0045]

[Table 1]

As is evident from the results in Table 1, Examples 1 to 6 were obtained by forming a coating film by the method for forming a brilliant coating film of the present invention. The resulting bright coating film was obtained. On the other hand, Comparative Examples 1 and 2
No brilliant coating film satisfying all of high chroma and polychromaticity in the shade portion was obtained.

[0047]

According to the present invention, by defining the hue difference of the interference color between the interference brilliant pigment and the baked composite oxide pigment, a high chroma feeling can be obtained in the shade portion, and the interference between the highlight portion and the shade portion can be obtained. The color difference between colors is emphasized, and it is possible to form a coating film capable of expressing a multicolored design, exhibiting a more luxurious glitter, and obtaining a more luxurious glitter. Was. In addition, the coating film obtained by the present invention is strongly used in painted objects requiring glitter, such as automobiles, motorcycles, and other vehicle outer plates, outer surfaces of containers, coil coating, and the home appliance industry, in order to strongly exhibit the above-mentioned glitter. You.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C09C 3/06 C09C 3/06 C09D 7/12 C09D 7/12 F term (Reference) 4D075 AE03 CB13 DA06 DB02 DC12 EA02 EA43 EB22 EB33 EC02 EC04 EC23 4J037 AA18 AA25 AA26 CA09 DD10 EE03 FF02 4J038 CD091 CG001 DB001 DD001 DD121 DD231 DF001 DG001 HA216 HA446 HA546 KA08 KA12 KA15 KA20 NA01 PA12 PA19 PB07

Claims (7)

[Claims] 1. A coating composition comprising a vehicle, an interference brilliant pigment and a calcined composite oxide pigment, wherein the interference hues of the interference brilliant pigment is 0 in a Munsell display system.
The interference color hue H of the composite oxide fired pigment is in the hue range of +30 to +50, or -30 to -50 when displayed with +50 counterclockwise and -50 counterclockwise with respect to the Munsell hue circle 100. Glitter paint composition. 2. The interference color hue H of the fired composite oxide pigment.
The glittering coating composition according to claim 1, wherein the value is in the hue range of +35 to +50 or -35 to +50. 3. The mass ratio of the interference brilliant pigment to the calcined composite oxide pigment is from 90/10 to 10/90.
Or the glittering coating composition according to 2. 4. The method according to claim 1, wherein the interference glittering pigment is any one of a metal oxide-coated mica pigment, a metal oxide-coated alumina flake pigment, a metal oxide-coated silica flake pigment, and a metal oxide-coated glass flake pigment. Items 1 to 3
The glittering coating composition according to any one of the above. 5. A coating film comprising forming a base coat layer on a substrate using the glitter coating composition according to any one of claims 1 to 4, and then forming a top coat layer using a clear paint. Method. 6. The method according to claim 5, wherein the clear coating contains a carboxyl group-containing polymer and an epoxy group-containing polymer. 7. A coated article coated by the method for forming a coating film according to claim 5.