JP2005272745A - Brilliant coating composition, method for forming brilliant coating film and brilliant coated article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brilliant coating that can form a strongly shining brilliant coating film having a dichroism, namely a test plate coated by the film is seen in a different color when the plate is observed from a direct opposite direction (a highlighted part) or from a skew direction (a shaded part), and to provide a method for forming a brilliant coating film and a brilliant coated article. <P>SOLUTION: The coating composition comprises a vehicle, a colored aluminium flake (A) and a colored aluminium flake pigment (B), and a hue Ha of the colored aluminium flake (A) represented by the Munsell color system is within a hue-range of +30 to +50 or -30 to -50 when the hue Hb of the colored aluminium flake pigment (B) is set at 0 against 100 of the Munsell hue ring and when indicated by +50 in anti-clockwise and -50 in clockwise. The coating is used for the method for forming a brilliant coating film and for the brilliant coated article. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a glitter coating composition, a method for forming a coating film, and a glitter paint coated by the method.

  Automotive parts such as automobile bodies and aluminum wheels are required to have high designability, and a coating film using a glittering paint composition containing a glittering material is required. For example, colored aluminum flake pigments are known. This colored aluminum flake pigment is obtained by coating a colored pigment on an aluminum flake pigment. Compared to the case where an aluminum flake pigment and a colored pigment are separately used in a paint, the brilliant and strong brilliant sensation of coloring. A coating film can be obtained.

Patent Document 1 discloses a coating composition containing a vehicle, a metal oxide-coated alumina flake pigment, and a colored aluminum flake pigment, wherein the hue H of the metal oxide-coated alumina flake pigment in the Munsell display system is the Munsell hue. When the hue of the colored aluminum flake pigment is 0 with respect to the ring 100 and displayed in the counterclockwise direction +50 or clockwise direction −50, it is in the hue range of +30 to +50 or −30 to −50. In addition to “brilliant sensation”, a brilliant coating composition is described in which a composite coating film that exhibits “steric sensation” is obtained.
Patent Document 2 includes flake shaped aluminum, flake shaped colored aluminum and a non-lustrous colored pigment, and the flake shaped colored aluminum and the non-brilliant colored pigment are dissimilar colors. A metallic paint is described which forms a coating film which is “color and glitter”.

However, although the coating films in Patent Document 1 and Patent Document 2 exhibit a glittering feeling due to multi-directional reflection, there is no description about dichroism.
Further, in the metallic paint of Patent Document 2, the flake shaped colored aluminum and the non-brilliant colored pigment are non-similar colors, and the brightness feeling of the flake shaped colored aluminum is lowered by the non-brilliant colored pigment used together. The glitter is not enough.

Japanese Patent Laid-Open No. 2001-3001 Japanese Patent Laid-Open No. 9-272824

  The object of the present invention is dichroic when the test plate is viewed almost from the front (highlight portion) and obliquely (shade portion), and has a strong glitter. An object of the present invention is to provide a glittering paint capable of forming a glittering coating film, a method for forming a glittering coating film, and a glittering coating.

  The present inventor has found that the above-mentioned problems can be achieved by using two kinds of colored aluminum flake pigments of different colors, in which the hues Ha and Hb in the Munsell display system have a specific relationship, and completed the present invention. .

That is, the present invention is a coating composition containing a vehicle, a colored aluminum flake pigment (A), and a colored aluminum flake pigment (B), wherein the hue Ha of the colored aluminum flake pigment (A) in the Munsell display system is When the hue Hb of the colored aluminum flake pigment (B) is 0 with respect to the Munsell hue ring 100 and the counterclockwise display is +50 or -50, the hue range is +30 to +50 or -30 to -50. A glittering paint composition is provided.
The hue Ha of the colored aluminum flake pigment (A) in the Munsell display system is preferably in the hue range of +35 to +50 or −35 to +50, and the colored aluminum flake pigment (A) and the colored aluminum flake pigment ( The mixing mass ratio with B) is preferably 90/10 to 10/90.
The present invention also provides a method for forming a glittering coating film, wherein a glittering base coating film is formed on a substrate using the above-described glittering coating composition, and then a clear top coating film is formed using the clear coating composition. And providing a glittering coating material coated by the coating film forming method.

  According to the present invention, the coating composition containing the colored aluminum flake pigment (A) and the colored aluminum flake pigment (B) having a specific hue difference makes the dichroism different in hue depending on the viewing angle of the coating film. (A color based on the pigment (A) and a color based on the pigment (B) can be seen), and the combination of aluminum flake pigments gives a strong radiance and an extremely high-quality radiance. An obtained coating film can be formed.

Hereinafter, the present invention will be described in detail.
[Glittering paint composition]
The glittering paint composition of the present invention is a paint composition containing a vehicle, a colored aluminum flake pigment (A), and a colored aluminum flake pigment (B), wherein the colored aluminum flake pigment (A) is a Munsell display system. When the hue Ha of the colored aluminum flake pigment (B) is 0 with respect to the Munsell hue ring 100 and is displayed as +50 counterclockwise and -50 clockwise, it is +30 to +50 or -30 to -50. It is in the hue range.
Of course, the colored aluminum flake pigment (A) and the colored aluminum flake pigment (B) are not of a predetermined hue, but arbitrary two types of hues Ha and Hb in the Munsell display system having a specific relationship. Can take different hues.

The vehicle contained in the glittering paint composition of the present invention disperses a colored aluminum flake pigment described later, and is composed of a resin for forming a coating film and, if necessary, a crosslinking agent.
Examples of the coating film forming resin constituting the vehicle include (a) acrylic resin, (b) polyester resin, (c) alkyd resin, (d) fluororesin, (e) epoxy resin, and (f) polyurethane resin. (G) polyether resins and the like, and acrylic resins and polyester resins are particularly preferably used. These can be used in combination of two or more.

  Further, the coating film-forming resin includes a curable type and a lacquer type, but usually a curable type is preferably used because of its good durability. In the case of a curable type, it is used by mixing with a crosslinking agent such as an amino resin (such as a melamine resin) or a (block) polyisocyanate compound, an amine, a polyamide, or a polyvalent carboxylic acid, and heated. Alternatively, the curing reaction can proceed at room temperature. Moreover, it is also possible to use together the resin for film-formation which does not have curability with the type which has curability.

As said (a) acrylic resin, the copolymer of an acryl-type monomer and another ethylenically unsaturated monomer can be mentioned. Acrylic monomers that can be used for the copolymerization include methyl, ethyl, propyl, n-butyl, i-butyl, t-butyl, 2-ethylhexyl, lauryl, phenyl, benzyl, 2-hydroxy of acrylic acid or methacrylic acid. Examples thereof include esterified products such as ethyl and 2-hydroxypropyl, ring-opening adducts of caprolactone of acrylic acid or 2-hydroxyethyl methacrylate, acrylamide, methacrylamide and N-methylolacrylamide. Other ethylenically unsaturated monomers copolymerizable with these include styrene, α-methylstyrene, itaconic acid, maleic acid, vinyl acetate and the like.
Examples of the polyester resin (b) include saturated polyester resins and unsaturated polyester resins, and examples thereof include condensates obtained by heat condensation of a polybasic acid and a polyhydric alcohol. Examples of the polybasic acid include saturated polybasic acids and unsaturated polybasic acids. Examples of the saturated polybasic acid include phthalic anhydride, terephthalic acid, succinic acid, and the like. Examples of the acid include maleic acid, maleic anhydride, fumaric acid and the like. Examples of the polyhydric alcohol include dihydric alcohol and trihydric alcohol. Examples of the dihydric alcohol include ethylene glycol and diethylene glycol. Examples of the trihydric alcohol include glycerin and trimethylolpropane. Etc.
The above (c) alkyd resin includes modifiers such as the above-mentioned polybasic acids and polyhydric alcohols, oils and fats and fatty acids (soybean oil, linseed oil, coconut oil, stearic acid, etc.), natural resins (rosin, amber, etc.) It is possible to use an alkyd resin obtained by denaturing by reaction.
The (d) fluororesin comprises any one of vinylidene fluoride resin, tetrafluoroethylene resin or a mixture thereof, a polymerizable compound containing a fluoroolefin and a hydroxy group, and other copolymerizable vinyl compounds. Examples thereof include resins made of various fluorine-based copolymers obtained by copolymerizing monomers.
As said (e) epoxy resin, resin etc. which are obtained by reaction of bisphenol and epichlorohydrin can be mentioned. Examples of bisphenol include bisphenol A and F. Examples of the bisphenol type epoxy resin include Epicoat 828, Epicoat 1001, Epicoat 1004, Epicoat 1007, Epicoat 1009 (all manufactured by Shell Chemical Co., Ltd.) and the like, and these can be chained using an appropriate chain extender. Extended ones can also be used.
Examples of the polyurethane resin (f) include resins having a urethane bond obtained from various polyol components such as acrylic, 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 mixtures thereof (TDI), diphenylmethane-4,4 ′. Diisocyanate (4,4′-MDI), diphenylmethane-2,4′-diisocyanate (2,4′-MDI), and mixtures 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 diene Isocyanate (HXDI) etc. It can be mentioned.
The (g) polyether resin is a polymer or copolymer having an ether bond, such as polyoxyethylene polyether, polyoxypropylene polyether, polyoxybutylene polyether, bisphenol A or bisphenol F. A polyether resin having at least two hydroxyl groups per molecule such as a polyether derived from an aromatic polyhydroxy compound, or the above polyether resin and succinic acid, adipic acid, sebacic acid, phthalic acid, isophthalic acid And carboxyl group-containing polyether resins obtained by reacting polycarboxylic acids such as terephthalic acid and trimellitic acid, or reactive derivatives such as acid anhydrides thereof.

  When the vehicle includes a cross-linking agent, the ratio of the resin for forming a coating film to the cross-linking agent is preferably 90 to 50% by mass of the resin for forming a film and 10 to 50% by mass of the cross-linking agent in terms of solid content. The film-forming resin is 85 to 60% by mass, and the crosslinking agent is 15 to 40% by mass. When the crosslinking agent is less than 10% by mass (when the coating film forming resin exceeds 90% by mass), crosslinking in the coating film is not sufficient. On the other hand, if the crosslinking agent exceeds 50% by mass (if the resin for forming a coating film is less than 50% by mass), the storage stability of the coating composition decreases and the curing rate increases, resulting in poor coating film appearance.

  In the colored aluminum flake pigment (A) and the colored aluminum flake pigment (B) contained in the glittering paint composition of the present invention, the hue Ha in the Munsell display system of the colored aluminum flake pigment (A) is the Munsell hue ring 100. On the other hand, when the hue Hb of the colored aluminum flake pigment (B) is 0 and displayed in the counterclockwise direction of +50 and clockwise direction of -50, two different colors having a hue range of +30 to +50 or -30 to -50 are displayed. It is a colored aluminum flake pigment. Preferably, by setting the hue range of +35 to +50 or −35 to +50, it is possible to express a glittering feeling with a much stronger dichroism.

  The colored aluminum flake pigment is an aluminum flake pigment obtained by coating a base aluminum flake with an organic color pigment or an inorganic color pigment in a flaky shape. For example, flakes having a particle size range of 1 to 100 μm, preferably 1 to 70 μm, an average particle size of 5 to 30 μm, and a thickness of 0.1 to 1.5 μm can be used. The colored aluminum flake pigment can arbitrarily obtain a desired hue by changing the type and amount (coating thickness) of the color pigment to be coated.

  Examples of organic pigments for coating aluminum flakes on the substrate include azo lake pigments, phthalocyanine pigments, indico pigments, berylene pigments, quinophthalone pigments, dioxazine pigments, quinacridone pigments, isoindolinone pigments, metal complexes Examples of the inorganic pigment include chrome lead, yellow iron oxide, red iron oxide, titanium dioxide, and carbon black.

The total content of the colored aluminum flake pigment (A) and the colored aluminum flake pigment (B) in the glittering coating composition (the ratio of the solid content of the pigment to 100 parts by mass of the paint: PWC) is 1 to 20 % Is preferable, 2 to 15% is more preferable, and 3% to 10% is more preferable. When it exceeds 20%, the appearance of the coating film is lowered, and when it is less than 1%, the dichroic glitter is lowered.
The mixed mass ratio of the colored aluminum flake pigment (A) / the colored aluminum flake pigment (B) in the glittering paint composition of the present invention is preferably 90/10 to 10/90, more preferably 70/30 to The range is 10/90. If the ratio is out of this range, the dichroic glitter may be lowered.

The glittering paint composition of the present invention can contain those conventionally used for paints as other glittering pigments other than the colored aluminum flake pigment. Such as, for example, aluminum flake pigments, interference mica pigments, colored mica pigments, metal titanium flakes, graphite, stainless steel flakes, plate iron oxide, phthalocyanine flakes, metal oxide-coated alumina flake pigments, metal oxide-coated silica Examples thereof include flake pigments, metal oxide-coated glass flake pigments, hologram pigments, flake pigments made of cholesteric liquid crystal polymers, and metal-plated glass flakes.
The other bright pigments can be contained in an arbitrary amount within a range that does not interfere with the dichroic effect of the colored aluminum flake pigment.
Further, one or more of the colored aluminum flake pigments of any other hue other than the colored aluminum flake pigments (A) and (B) having a specific relationship with the hue Ha in the Munsell display system may be used as the pigment (A), ( It is also possible to contain it in an arbitrary amount within a range that does not interfere with the dichroic effect of B).
Various extender pigments and the like can be used in small amounts as long as they do not interfere with the dichroic effect of the pigments (A) and (B).

  The glittering paint composition of the present invention can contain a color pigment. As such a thing, the organic pigment mentioned above and an inorganic pigment can be mentioned as a pigment for coating aluminum flakes. The addition amount of the color pigment can be arbitrarily set according to the hue as long as the dichroic effect of the color aluminum flake pigment is not disturbed. Various extender pigments can be used in combination. In addition, when using the above-mentioned other bright pigments, colored pigments, colored aluminum flake pigments of other hues, etc., the total content of the entire pigment including these pigments and the colored aluminum flake pigments (A) and (B) The amount (PWC) is preferably less than 50%, more preferably less than 30%. When it exceeds 50%, the appearance of the coating film is deteriorated.

  In addition to the above components, the glittering paint composition of the present invention comprises an antisettling agent such as a polyamide wax which is a lubricating dispersion of an aliphatic amide and a polyethylene wax which is a colloidal dispersion mainly composed of oxidized polyethylene, and a curing catalyst. , UV absorbers, antioxidants, leveling agents, surface conditioners such as silicon and organic polymers, sagging inhibitors, thickeners, antifoaming agents, lubricants, crosslinkable polymer particles (microgels), etc. are added as appropriate. be able to. These additives can improve the performance of paints and coating films by blending them at a ratio of 15 parts by mass or less with respect to 100 parts by mass (solid content basis) of the vehicle.

  The glittering paint composition of the present invention is provided in a form in which the above-mentioned constituents are usually dissolved or dispersed in a solvent. Any solvent can be used as long as it dissolves or disperses the vehicle, and an organic solvent and / or water can be used. Examples of the organic solvent include those usually used in the paint field. 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, alcohols and the like. Water is preferably used when the use of organic solvents is restricted from an environmental point of view. In this case, an appropriate amount of a hydrophilic organic solvent may be contained.

[Glittering film forming method]
In the method for forming a glittering coating film of the present invention, the glittering coating composition is applied on a substrate to form a glittering base coating film, and then the clear coating film is obtained on the glittering coating film thus obtained. At least one clear coating is applied as a top coating to form a clear top coating.

The 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, and ethylene-vinyl acetate copolymer Resins, polyamide resins, acrylic resins, vinylidene chloride resins, polycarbonate resins, polyurethane resins, epoxy resins and other plastic materials such as various FRPs; natural or synthetic materials such as wood and fiber materials (paper, cloth, etc.) Is mentioned.
In the coating film forming method of the present invention, the glittering paint composition of the present invention is applied to the substrate directly or through a base coating film, but the coated material coated by the coating film forming method of the present invention is an automobile. In the case of the vehicle body and parts, it is preferable to perform pre-coating, intermediate coating, and the like by chemical conversion treatment, electrodeposition coating, and the like in advance.
In addition to concealing the base, imparting chipping resistance, and ensuring adhesion with the top coat, the intermediate coating is performed to develop a composite color with the top coat, if necessary, and to enhance designability. A coating film is formed using a gray color intermediate coating or a color intermediate coating.

In the coating film forming method of the present invention, first, the glitter coating composition is applied to the substrate as a glitter base coating film. In the case where the base material is a base coat with an undercoat, an intermediate coat or the like, the above-mentioned base is coated on the base coat by a wet on wet (W / W) method or a wet on dry (W / D) method. A glittering paint composition can be applied. The W / W method is a method in which a base coat is applied and then dried by air drying or the like, and is applied to an uncured or semi-cured base coat. On the other hand, the W / D method is a base coat. This is a method of applying to a base coating film cured by baking. Here, 10-50 micrometers is preferable and, as for the dry film thickness of the said glittering base coating film, 10-30 micrometers is more preferable. (Hereinafter, the film thickness of the coating film will be exemplified for the case of an automobile body or an automobile part.)
The method for coating the glitter coating composition on the substrate is not particularly limited, but a spray method, a roll coater method or the like is preferable, and the coating can be performed a plurality of times.

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

  As the clear top paint used in the method for forming a glittering coating film of the present invention, those generally used for top coating 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 these modified resins and the above-mentioned crosslinking agent can be used, but the carboxyl described in JP-B-8-19315 can be used. A clear coating containing a group-containing polymer and an epoxy group-containing polymer is preferably used from the viewpoint of acid rain resistance. In addition, these clear paints may contain additives such as coloring pigments, extender pigments, modifiers, ultraviolet absorbers, leveling agents, dispersants, antifoaming agents, etc., as long as the transparency is not impaired. It is possible to mix.

The clear coating on the coating film of the present invention can be performed after simultaneously curing the above-described glittering base coating film and, if necessary, the layer formed from the intermediate coating composition. It is preferable to use the W / W method for the glittering base coating film in a semi-cured state. When the clear paint is applied a plurality of times, it may be baked at the same time after the final clear paint is applied, and it may not be completely cured at the initial application stage of the clear paint. Thus, the clear top coating film formed by the W / W method can be obtained by baking at 120 to 160 ° C. for a predetermined time together with the glittering base coating film and, if necessary, the base coating film. .
The dry film thickness of the clear top coating film is preferably 10 to 80 μm per coat, and more preferably 20 to 50 μm.

[Glitter paint]
The glitter coating of the present invention is obtained by the above-described glitter coating film forming method. In this glittering coated product, a coating composition containing a vehicle, a colored aluminum flake pigment (A), and a colored aluminum flake pigment (B) as a substrate, the Munsell display system for the colored aluminum flake pigment (A). When the hue Ha of the colored aluminum flake pigment (B) is 0 with respect to the Munsell hue ring 100 and is displayed as +50 counterclockwise and -50 clockwise, it is +30 to +50 or -30 to -50. A glittering base coating film is formed from the glittering paint set in the hue range, and the top clear coating film is formed thereon.
10-50 micrometers is preferable and, as for the dry film thickness of the said glittering base coating film, 10-30 micrometers is more preferable. The dry film thickness of the clear top coating film is preferably 10 to 80 μm per coat, and more preferably 20 to 50 μm.

  EXAMPLES Next, although an Example and a comparative example are given and this invention is demonstrated more concretely, this invention is not limited only to these Examples. In addition, a compounding quantity represents a mass part unless there is particular notice.

Examples 1-9, Comparative Examples 1-3
[Preparation of substrate]
Dull steel plate (length 300 mm, width 100 mm and thickness 0.8 mm) was subjected to chemical conversion treatment using a zinc phosphate treatment agent ("Surfdyne SD2000", Nippon Paint Co., Ltd.), and then a cationic electrodeposition paint ("Power Top"). U-50 ”(manufactured by Nippon Paint Co., Ltd.) was electrodeposited so that the dry film thickness was 25 μm. Next, after baking at 160 ° C. for 30 minutes, an intermediate coating (“Orga S-90 Sealer Gray (N-6)”, manufactured by Nippon Paint Co., Ltd.) is applied by air spray so that the dry film thickness is 40 μm. An intermediate coating film was formed by baking at 30 ° C. for 30 minutes to obtain a substrate.

[Preparation of glitter paint composition]
Acrylic resin (styrene / methyl methacrylate / ethyl methacrylate / hydroxyethyl methacrylate / methacrylic acid copolymer, number average molecular weight about 20,000, hydroxyl value 45, acid value 15, solid content 50 mass%) and melamine resin (trade name, “Uban 20SE”, manufactured by Mitsui Chemicals Co., Ltd., solid content of 60% by mass) was mixed with a vehicle obtained by blending at a solid content mass ratio of 80:20 to colored aluminum flake pigment (A), colored aluminum flake pigment (B ), And if necessary, color pigments were blended in the types and blending amounts shown in Table 1. Next, an organic solvent (mass ratio of toluene / xylene / ethyl acetate / butyl acetate = 70/15/10/5) is added, and the mixture is stirred and mixed so as to obtain an appropriate coating viscosity with a stirrer to prepare a glittering coating composition. did.

[Formation of glitter coating]
The glitter coating composition obtained previously was applied to the coated surface of the substrate so that the dry film thickness was 15 μm. The coating was performed using an electrostatic coating machine (“Auto REA”, manufactured by ABB Industry) at an atomization pressure of 2.8 kg / cm ² . The booth atmosphere during painting was maintained at a temperature of 25 ° C. and a humidity of 75%. After coating, the coating was set for 3 minutes, and the clear coating was applied to a dry film thickness of 35 μm, set at room temperature for 10 minutes, and baked at 140 ° C. for 30 minutes. The dichroism and design properties of the obtained coating film were evaluated by the following evaluation methods. The clear paint used was an acrylic / melamine resin-based clear paint 1 (trade name: “Superlac O-130 Clear”, manufactured by Nippon Paint Co., Ltd.) or a clear paint 2 containing a carboxyl group-containing polymer and an epoxy group-containing polymer. (“Mac Flow O-520 Clear”, manufactured by Nippon Paint Co., Ltd.).
The evaluation results are shown in Table 1.

[Evaluation methods]
Dichroism: It was visually evaluated whether or not the color of the test plate looked different when viewed from the front (highlighted portion) and obliquely (shaded portion).
3 ... Remarkably different 2 ... Differently visible 1 ... Almost different design appearance: The glitter was visually evaluated.
3 ... Slight radiance 2 ... Slight shine 1 ... Small shine

  As is apparent from the results in Table 1, Examples 1 to 9 are formed by a coating film forming method using the glittering base coating material of the present invention, and exhibit dichroism and a strong glitter feeling. A glittering coating film could be obtained. On the other hand, Comparative Examples 1-3 resulted in not expressing the target design.

  Since the glitter coating film obtained by the present invention exhibits the above-mentioned excellent design feeling, in the fields where glitter such as automobiles, motorcycles, etc., various parts, container outer surfaces, coil coatings, and home appliances are required. Preferably used.

Claims (5)

  A coating composition containing a vehicle, a colored aluminum flake pigment (A), and a colored aluminum flake pigment (B), wherein the hue Ha of the colored aluminum flake pigment (A) in the Munsell display system is the Munsell hue ring 100 On the other hand, the hue Hb of the colored aluminum flake pigment (B) is 0, and when it is displayed as counterclockwise +50 or clockwise -50, it is in the range of +30 to +50 or -30 to -50. Coating composition.   2. The glittering paint composition according to claim 1, wherein the hue Ha of the colored aluminum flake pigment (A) in the Munsell display system is in a hue range of +35 to +50 or −35 to +50.   The glitter paint composition according to claim 1 or 2, wherein a mixing mass ratio of the colored aluminum flake pigment (A) and the colored aluminum flake pigment (B) is 90/10 to 10/90.   A glitter base coating film is formed on the base material using the glitter coating composition according to any one of claims 1 to 3, and then a clear top coating film is formed using the clear coating composition. A method for forming a glittering coating film. A glittering coating product, which is coated by the method for forming a glittering coating film according to claim 4.