JP2002080791A - Low-gloss metal-tone coating composition, method for forming coating film and low-gloss metal-tone coated article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-gloss metal-tone coating composition, a method for forming a coating film and a low-gloss metal-tone coated article, in which a metal-tone, precisely low-gloss and massive feeling associated with casting, can be expressed, such a metal-tone being impossible with a conventional brilliant coating or filler. SOLUTION: A basal coating film layer is formed on a base material such as an aluminum wheel for an automobile, and a low-gloss metal-tone coating composition comprising at least one kind of a brilliant pigment selected from a group consisting of an aluminum flake pigment coated with a metal oxide, a stainless steel flake pigment coated with a metal oxide and a glass flake pigment coated with a metal oxide, and a hollow ceramic filler is applied on it to form a low-gloss coating film layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-gloss metallic paint composition using a hollow ceramic filler and a bright pigment in combination, a method for forming a coating film, and a low-gloss metallic paint obtained by this method.

[0002]

2. Description of the Related Art As a paint for expressing a brilliant design on a material such as an automobile body or an aluminum wheel, a mixture of a flaky metal pigment and a colored pigment, an interference mica having a surface coated with titanium dioxide or a surface. A glitter paint using colored mica or the like coated with iron oxide or an organic pigment is used. Also, for example, JP-A-2-142882 describes a glittering paint containing a flaky colored aluminum pigment, and JP-A-5-70719 describes a glittering paint using a flaky colored aluminum pigment and mica in combination. Have been.

[0003]

However, the coating film formed by these conventional glittering paints has a feeling of "silver paint" rather than "metallic (metallic tone)", and is a true metallic paint. It was difficult to express the feel. Therefore, an object of the present invention is to provide a low-gloss metal-like paint composition and a coating film that can exhibit a metallic feeling that cannot be expressed by conventional glittering paints and fillers, in particular, low glossiness and weightiness of castings. It is an object of the present invention to provide a forming method and a low gloss metallic coating.

[0004]

The low gloss metallic coating composition of the present invention is selected from the group consisting of metal oxide coated aluminum flake pigments, metal oxide coated stainless flake pigments, and metal oxide coated glass flake pigments. Characterized in that it contains at least one brilliant pigment, a hollow ceramic filler, and a vehicle. Examples of the metal oxide include titanium oxide and iron oxide.

[0005] The low-gloss metallic paint composition of the present invention is characterized in that the total of the solid content mass ratio (PWC) of the brilliant pigment and the PWC of the hollow ceramic filler is based on 100 parts of the solid content of the paint composition. It is preferable that the ratio between the PWC of the glittering pigment and the PWC of the hollow ceramic filler is 10:90 to 90:10, and 0.01 to 80%.

[0006] The coating film forming method of the present invention is to form a multilayer coating film by sequentially laminating a base coating layer and a low gloss coating layer formed by the above low gloss metallic coating composition on a substrate. Form.
A clear top coat layer may be further formed on the low gloss coat layer. When the lightness of the base coating film layer is equal to or less than the lightness N4 in the Munsell display system, it is possible to further emphasize the low-gloss metallic design. Further, if the clear top coat layer is formed from a paint containing (1) a carboxyl group-containing polymer and an epoxy group-containing polymer, (2) a fluororesin, or (3) a silicone resin, a coating having excellent acid resistance can be obtained. A membrane can be obtained.

[0007] The low-gloss metallic coating of the present invention is obtained by forming a low-gloss coating on a substrate by the above-mentioned method for forming a coating. Wheels.

[0008]

Embodiments of the present invention will be described below in detail.

[Low Gloss Metallic Paint Composition] The low gloss metallic paint composition of the present invention contains metal oxide-coated aluminum flake pigments and metal oxide-coated stainless steel flake pigments as materials for exhibiting glitter. And at least one brilliant pigment selected from the group consisting of glass flake pigments coated with metal oxide. Further, a hollow ceramic filler is used in combination as a material for exhibiting low gloss. By using these glitter pigments and low-gloss fillers in combination, it is possible to obtain a coating film having a cast-like low gloss and a heavy feeling.

The above three types of brilliant pigments are made of titanium oxide, iron oxide, or a metal oxide such as chromium, cobalt, tin, zirconium, etc. on the surface of a flake base obtained by pulverizing aluminum, stainless steel, or glass into flakes. Is formed. Preferred types of metal oxides are titanium oxide or iron oxide, with titanium oxide being particularly preferred. Further, in order to improve weather resistance and water resistance, the outermost surface layer of the glitter pigment may be coated with silica such as amorphous silica. Silica coating amount,
It is 1 to 10% by mass, more preferably 3 to 7% by mass, based on the flake substrate.

The flake substrate has a major axis and a minor axis as the particle diameter, and the average particle diameter of the major axis is 5 to 100 μm.
It is preferable that the thickness is 0.1 to 5 μm. Further, it is preferable to use a material having high surface smoothness and a sharp particle size distribution, since scattering of reflected light is small. As an example of a method of coating a metal oxide on a flake substrate, there is a method of mixing and stirring a metal oxide coated with a dispersant with a flake substrate in a nonpolar solvent. As a dispersant used at this time, benzoic acid,
Examples thereof include aromatic carboxylic acids such as vinyl benzoate and salicylic acid, and amino compounds such as ethylenediamine, trimethylenediamine, tetramethylenediamine, diaminoheptane, diaminooctane, and phenylenediamine.

By adjusting the coating weight of the metal oxide, a glitter pigment exhibiting a desired interference color can be obtained. The preferred range of the coating mass is the flake substrate 10
10 to 300 parts by mass with respect to 0 parts by mass, and more preferably 20 to 200 parts by mass with respect to 100 parts by mass of the flake base material.
Parts by weight. If the coating mass is within the above range, a deep interference coating film can be obtained.

The content of the brilliant pigment used in the present invention is as follows:
It is 0.01 to 80%, preferably 5 to 50%, more preferably 15 to 45%, in terms of the solid content mass ratio (PWC) to 100 parts of the solid content of the coating composition. When the PWC is less than 0.01%, the base concealing property and the interference are reduced, and when the PWC is more than 80%, the appearance of the coating film is deteriorated.

The color tone of the brilliant pigment can be adjusted by changing the type and amount (coating thickness) of the metal oxide to be coated. For example, in the case of a titanium oxide-coated stainless flake pigment, 5.0 based on the flake base material.
Coating in an amount of mass% gives a bluish tint. Similarly, 7.0% by mass, 8.3% by mass and 10.5% by mass
, A dark gold color, a light gold color, and a red bean color can be developed, respectively.

The glitter pigment has an average major particle diameter of 10 to 10 (including a silica coating).
It is preferably 40 μm. When the average particle size is less than 10 μm, it is difficult to obtain a desired design, and when the average particle size is more than 40 μm, poor coating film appearance may be caused.

The hollow ceramic filler used in the present invention is an inorganic hollow sphere formed by baking and foaming glass such as silica, alumina, or a mixture thereof, and has a particle size of 10 to 100 μm (preferably 20 to 100 μm). 80μ
m), having an average particle size of 30 to 60 μm (preferably 40 to 5 μm).
0 μm), pH 6-8.

The hollow ceramic filler is PWC
It is 0.01 to 50%, preferably 1 to 30%, more preferably 5 to 20%. When the PWC is less than 0.01%, the base concealing property and the interference are reduced, and when the PWC is more than 50%, the appearance of the coating film is deteriorated. Also,
In relation to the glitter pigment, the ratio of the PWC of the glitter pigment to the PWC of the hollow ceramic filler is 10:90 to
The ratio is preferably 90:10, more preferably 50:50 to 70:30, and even more preferably 20:10. If the PWC ratio of the glittering pigment is too small, the amount of the hollow filler becomes relatively large and the metallic cast feeling is weakened. Conversely, if the PWC ratio of the glittering pigment is large, the luster is not low.

The vehicle contained in the low-gloss metallic coating composition of the present invention contains the glitter pigment and the hollow ceramic filler dispersed therein, and contains a resin for forming a coating film and, if necessary, a crosslinking agent. Consists of 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) an epoxy resin, (f) a polyurethane resin, (G) polyether resins, which can be used alone or in combination of two or more. Among them, it is preferable to use an acrylic resin and a polyester resin.

As the acrylic resin (a), a copolymer of an acrylic monomer and another ethylenically unsaturated monomer can be exemplified. Acrylic monomers that can be used in the copolymerization include methyl (meth) acrylate, ethyl, propyl, n-butyl, i-butyl and t-butyl acrylate.
Esters such as butyl, 2-ethylhexyl, lauryl, phenyl, benzyl, 2-hydroxyethyl, and 2-hydroxypropyl; ring-opening adduct of caprolactone of 2-hydroxyethyl (meth) acrylate; glycidyl (meth) acrylate; (Meth) acrylamide, N-methylol (meth) acrylamide and the like. Further, as other ethylenically unsaturated monomers copolymerizable with these,
Examples include styrene, α-methylstyrene, itaconic acid, maleic acid, and vinyl acetate.

Examples of the polyester resin (b) include a saturated polyester resin and an unsaturated polyester resin comprising a condensate of a polybasic acid and a polyhydric alcohol. Saturated polybasic acids as raw materials include phthalic anhydride, terephthalic acid, succinic acid and the like, and unsaturated polybasic acids include maleic acid, maleic anhydride, fumaric acid and the like. On the other hand, polyhydric alcohols include dihydric alcohols and trihydric alcohols, and dihydric alcohols include ethylene glycol and diethylene glycol. Trihydric alcohols include glycerin and trimethylolpropane.

The resin for forming a coating film includes a curable resin and a solvent-drying type lacquer. The resin for forming a coating film is usually a curable resin. To the curable resin, an amino resin, a (block) polyisocyanate compound, other amines, polyamides, polyvalent carboxylic acid, or the like is added as a crosslinking agent, and the curing reaction can proceed at heating or at room temperature. In addition, it is also possible to use a curable resin and a lacquer together.

When the vehicle contains the above-mentioned crosslinking agent, the ratio of the coating film-forming resin to the crosslinking agent is 90 to 50% by mass and the crosslinking agent is 10 to 50% by mass in terms of solid content. Yes, preferably 85 to 60% by mass of the resin for forming a coating film,
The crosslinking agent is 15 to 40% by mass. 10% by mass of crosslinking agent
Less, or when the coating film forming resin exceeds 90% by mass,
Insufficient crosslinking in the coating film. On the other hand, when the cross-linking agent exceeds 50% by mass or the resin for forming a coating film is less than 50% by mass, the storage stability of the coating composition decreases and the curing speed increases, so that the appearance of the coating film deteriorates.

[0023] Other glitter pigments and coloring pigments can be added to the low gloss metallic coating composition of the present invention.
As other glittering pigments, for example, mica, metal titanium flakes, alumina flakes, silica flakes, graphite, plate-like iron oxide, phthalocyanine flakes and the like each glitter pigments, and as a coloring pigment, for example, Azo lake, phthalocyanine, indigo, perylene, quinophthalone, dioxazine,
Examples include coloring pigments such as quinacridone-based, isoindolinone-based, and metal complexes, and graphite, yellow iron oxide, red iron oxide, titanium dioxide, and carbon black. The amounts of these glitter pigments and coloring pigments can be arbitrarily set as long as the effects of the glitter pigment and the hollow ceramic filler essential for the present invention and the composite color effect with the underlayer are not hindered. An extender pigment such as calcium silicate or precipitated barium sulfate can also be used in combination.

The low-gloss metallic coating composition of the present invention contains, in addition to the above components, a polyamide wax which is a lubricating dispersion of an aliphatic amide, a polyethylene wax which is a colloidal dispersion mainly composed of polyethylene oxide, and a sediment. Inhibitors, curing catalysts, ultraviolet absorbers, antioxidants, leveling agents, surface conditioners such as silicon and organic polymers, anti-sagging agents, thickeners, defoamers, cross-linkable polymer particles (microgels), etc. It can be added as appropriate. These additives can improve the performance of paints and coatings by blending, for example, 15 parts by mass or less with respect to 100 parts by mass of the vehicle (based on solid content).

The low-gloss metallic coating composition of the present invention is provided in a form in which the above components are usually dissolved or dispersed in a solvent. The solvent is not limited 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 commonly used in the coatings field, for example, hydrocarbons such as toluene and xylene, ketones such as acetone and methyl ethyl ketone, esters such as ethyl acetate, cellosolve acetate, and butyl cellosolve, and alcohols. it can. It is preferable to use water as a solvent to form an aqueous coating composition from the viewpoint of environmental protection. In this case, an appropriate amount of a hydrophilic organic solvent may be contained.

[Coating film forming method] The coating film forming method of the present invention comprises:
This is a method for forming a multilayer coating film by sequentially laminating a base coating layer, a low gloss coating layer formed by the low gloss metallic coating composition of the present invention, and a clear top coating layer on a substrate. . By omitting the clear coating layer, a coating film having a matte feeling can be obtained.

The base material for forming a coating film used in the present invention is not particularly limited. Examples of the base material include untreated steel materials, iron materials such as zinc steel materials, aluminum materials, copper materials or metals such as alloys thereof, and the like. Glass, cement, inorganic materials such as concrete, polyethylene resin, polypropylene resin, ethylene-vinyl acetate copolymer resin, polyamide resin, acrylic resin, vinylidene chloride resin, polycarbonate resin,
Resins such as polyurethane resin and epoxy resin and various F
Examples thereof include plastic materials such as RP, natural and synthetic materials such as wood and fiber materials (paper, cloth, etc.), and processed products thereof.

In the method for forming a coating film of the present invention, the above-mentioned substrate is coated with the low-gloss metallic coating composition of the present invention via a base coating layer. In the case of automobile parts such as automobile wheels, the base material is previously coated with a base coat such as a degreasing or chemical conversion treatment, an undercoating with electrodeposition coating or powder coating, and an undercoating with an intermediate coating if necessary. Is preferably applied.

In the method for forming a coating film of the present invention, a base coating film,
A low gloss coating film and a clear coating film can be formed by a wet-on-wet (W / W) method or a wet-on-dry (W / D) method to form a multilayer coating film. In addition, W /
The W method is a method in which the lower layer coating film is dried by air drying or the like to leave it in an uncured state or a semi-cured state, and the upper layer is coated thereon and baked and cured at once. The W / D method is a method in which a lower layer coating film is baked and cured, and an upper layer coating film is applied and further baked. The method for forming each coating layer is not particularly limited, but a spray method, a roll coater method, or the like is preferable, and each coating layer can be coated a plurality of times. The coating is baked at 80 to 160 ° C. for a predetermined time.

The base coating film layer used in the coating film forming method of the present invention can be formed by a solvent type paint or a powder type paint. The paint used is adjusted by appropriately combining the vehicle constituting the low gloss metallic paint composition with the pigments and additives which can be added as required. The dry film thickness of the base coating layer is 30 to 200 μm
If the ratio is out of this range, the appearance of the coating film may be deteriorated. More preferably, it is 50 to 150 μm. In addition, the brightness of the base coating layer is set to a dark color having a brightness of N4 or less in the Munsell display system, and the casting effect is obtained due to the combined effect with the low gloss coating layer formed by the low gloss metallic paint composition of the present invention. The low glossiness of the tone and the feeling of weight can be further enhanced. Similarly, when the base coating film layer is a clear coating film, the brightness of the base coating film or the base material under the clear coating film can be set to N4 or less.

On the base coating layer, a low gloss coating layer is formed by the low gloss metallic coating composition of the present invention. It is preferable to use the W / D method for forming a multilayer film of the base coating layer and the low gloss coating layer. The dry film thickness of the low gloss coating layer is 1
The thickness is preferably from 0 to 100 μm, more preferably from 20 to 50
μm.

When a clear top coat layer is formed as the top coat layer, it is possible to prevent the glitter pigment from being damaged and to improve the smoothness. When the luster pigment is relatively large in the low gloss coating layer, the surface smoothness can be further improved by applying two or more layers of clear paint. The formation of the clear top coat layer is performed according to the above W / W
It is preferable to use the method. In the case where the clear paint is applied a plurality of times, baking may be performed at a time after the final clear paint is applied, and it is not necessary to completely cure the clear paint at the initial coating stage. The dry film thickness of the clear top coat layer is preferably 30 to 400 μm, and if it is out of this range, the appearance of the coat may be deteriorated. A more preferred dry film thickness is 50 to 200 μm.

The clear top coat layer can be formed by a general clear paint. A so-called turbid clear coating film having a semi-transparent feeling can also be used. The clear coating may be any of a solvent type and a powder type. As the solvent type coating, a one-part type coating may be used, or a two-part type coating such as a two-part type urethane resin coating may be used. . As a particularly preferable clear paint, a clear paint containing a carboxyl group-containing polymer and an epoxy group-containing polymer described in JP-B-8-19315 can be exemplified. This clear coating has high acid resistance and thus is resistant to acid rain, and further has such features as not disturbing the orientation of the brilliant pigment when applied to a low gloss coating layer by the W / W method. Further, general-purpose fluorine resin or silicone resin can be preferably used because of high weather resistance. These clear paints, if necessary, as long as the transparency is not impaired, coloring pigments, extender pigments, modifiers,
It may contain additives such as an ultraviolet absorber, a leveling agent, a dispersant, and an antifoaming agent.

[Low-gloss metal-coated product] The low-gloss metal-coated product of the present invention comprises a base coating layer and a low-gloss coating layer of the present invention on a substrate, and if necessary, a clear topcoat coating. It has a layer. When the clear top coat layer is not formed, a coated surface having a matte design can be obtained, and when the clear top coat layer is formed, a coated surface having a moderately low gloss design can be obtained. be able to. Regardless of the presence or absence of the clear coating layer, if the lightness of the base layer, etc., which is the lower layer of the low gloss coating layer, is not more than the lightness N4 in the Munsell display system, the cast-like low glossiness and weightiness are further enhanced. be able to.

[0035]

Next, the present invention will be described more specifically with reference to examples and comparative examples. In addition, the compounding amount represents a mass part unless there is particular notice.

[0036]

[Example 1] [Preparation of base material] An aluminum wheel for automobiles was sequentially subjected to degreasing treatment and treatment with a surface conditioner.
After washing with water, chromate treatment agent as chrome surface amount is 10 mg / m ² ( "Alsurf 1000", Nippon Paint Co., Ltd.) were subjected to chemical conversion treatment at.

[Coating for Forming Base Coating Layer] An acrylic resin-based powder type black (N1) coating ("Powax A30 Black", manufactured by Nippon Paint Co., Ltd .; hereinafter, referred to as base coating A) was used.

[Preparation of Low Gloss Metallic Paint Composition] Acrylic resin (copolymer of styrene / methyl methacrylate / ethyl methacrylate / hydroxyethyl methacrylate / methacrylic acid, number average molecular weight: about 20,000, hydroxyl value: 45, acid value: 15, a solid content of 50% by mass) and a melamine resin (“Uban 20SE”, manufactured by Mitsui Chemicals, Inc., solid content of 60% by mass) were mixed at a solid content mass ratio of 80:20 to obtain a titanium oxide. Coated stainless steel flake pigment (“NIF Color ST”, manufactured by Nippon Inorganic Chemical Industry Co., Ltd., average particle size 25 with the outermost surface coated with 5.0% by mass of amorphous silica)
μm. Blue. In Table 1 below, "stain" is indicated. ) Was blended in 20% by PWC, and 10% by hollow ceramic filler ("East Spheres", manufactured by Taiheiyo Cement Co., average particle size: 45 μm) by PWC. Next, the mixture was stirred and mixed with an organic solvent (mass ratio of toluene / xylene / ethyl acetate / butyl acetate = 70/15/10/5) so as to obtain an appropriate coating viscosity by a stirrer to prepare a low-gloss metallic paint composition. .

[Formation of Multi-layer Coating Film] Each coating film layer shown in Table 1 was sequentially formed on the coated surface of the substrate. The base coating layer is formed to a dry film thickness of 50 μm at a baking temperature of 150 ° C. for 5 minutes, and then dried at a baking temperature of 150 ° C. for 5 minutes using a low-gloss metallic coating composition. 30μ thickness
m. The low gloss design of the obtained multilayer coating film was evaluated by the following method. Table 1 shows the results.

[Evaluation Method] <Low Gloss Design> The design feeling of an aluminum automobile wheel was visually evaluated. …: A coating film having a low glossiness and a sufficient weight feeling of the casting is formed. …: Both low gloss and heavy feeling are maintained at the same level. X: Either low glossiness or heavy feeling or both of them are lacking.

[0041]

[Table 1]

[0042]

Examples 2 to 14 and Comparative Examples 1 and 2 A composite coating film was formed and evaluated in the same manner as in Example 1 except that the following points were changed as shown in Table 1.

The following were used as the paint for forming the base coating layer. (A) Base paint A used in Example 1. (B) Acrylic resin powder type clear paint ("Powax A50 Clear", manufactured by Nippon Paint Co., Ltd .: hereinafter, referred to as base paint B). (C) Acrylic resin-based powder type dark gray (N4) paint ("Powax A30 Dark Gray", manufactured by Nippon Paint Co., Ltd., referred to as base paint C). (D) Acrylic resin-based solvent-type clear paint ("Super Lac M90 Clear", manufactured by Nippon Paint Co., Ltd., referred to as base paint D). (E) Acrylic resin-based solvent type black (N1) paint (“Superlac M90 Black”, manufactured by Nippon Paint Co., Ltd., referred to as base paint E).

The formation of the multilayer coating film was performed under the conditions that the baking temperature was 160 ° C. and the dry film thickness was 100 μm in 10 minutes when the base coating material was a powder type coating material.

With respect to the low-gloss metallic coating composition, the vehicle used in Example 1 was used, and the composition shown in Table 1 was used, and the glittering pigment was an iron oxide-coated aluminum flake pigment ("Paliochrome Gold L"). -2025 ", BA
Made by SF. In Table 1, "aluminum" is indicated. ) And glass flakes coated with titanium oxide ("Metashine", manufactured by Nippon Sheet Glass Co., Ltd .; indicated as "glass" in Table 1).
It was prepared in combination with the above hollow ceramic filler.

When a clear paint is used, an acrylic resin-based solvent-type clear paint ("Superlac O-13") is used.
0 clear ", manufactured by Nippon Paint Co., Ltd.). The clear top coat layer was coated at a baking temperature of 150 ° C. for 5 minutes to a dry film thickness of 50 μm to form a multilayer coat.

As is clear from the results shown in Table 1, in Examples 1 to 16, since the coating film was formed by using the specific glittering paint and the hollow ceramic filler in combination, the low glossiness and the weight Was emphasized. On the other hand, the coating films formed by the comparative examples in which the above combination was not carried out were all designs that were “simply painted in silver color” with no weight, rather than “metallic”.

[0048]

According to the low gloss metallic coating composition of the present invention, a metal oxide-coated flake pigment and a hollow ceramic filler are used in combination.
The cast-like low gloss and heavy design can be expressed. Further, by the coating film forming method of the present invention, on the substrate, a base coating layer, a low-gloss coating layer having a brilliant pigment and a ceramic filler, and optionally a clear top coating layer is sequentially laminated. When a multilayer coating film is formed, a cast-like low glossiness and a heavy design can be exhibited by the combined action of the base coating layer and the low gloss coating layer. Further, the design can be further emphasized by setting the lightness of the base layer to N4 or less.

The low-gloss metallic coating of the present invention obtained by this coating film forming method has a unique cast-like design, and is therefore used for vehicle outer panels such as automobiles and motorcycles, aluminum wheels for automobiles, outer surfaces of various containers, coils, and the like. It is useful as a coating for various products such as coatings and the home appliance industry.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B60B 3/00 B60B 3/00 A C09C 1/30 C09C 1/30 1/34 1/34 1/40 1 / 40 3/06 3/06 C09D 5/00 C09D 5/00 Z 7/12 7/12 (72) Inventor Masashi Takahashi 4-1-1-15 Minamishinagawa, Shinagawa-ku, Tokyo F-term in Japan Paint Co., Ltd. (Reference) 4D075 AE03 CA32 CA38 CA44 CB02 CB06 CB13 DA06 DA23 DB02 DB05 DB06 DB07 DB12 DB13 DB18 DB20 DB21 DB36 DB38 DB40 DB43 DB47 DB48 DB50 DB53 DB61 DC10 DC13 DC18 DC41 EA02 EA06 EA07 EA10 EA43 EB16 EB32 EB33 EB22 EB33 EB45 EB56 EC02 EC03 EC05 EC10 EC11 EC23 EC24 EC54 4J037 AA04 AA05 AA30 CA09 DD10 EE03 FF09 4J038 CC031 CC081 CD091 CF021 CG141 CG151 DB001 DD041 DD181 DF001 DG001 HA026 HA036 HA066 HA216 KA084 HA486 HA546 5 KA20 KA21 NA01 PA12 PB07 PC02

Claims (9)

[Claims] At least one brilliant pigment selected from the group consisting of a metal oxide-coated aluminum flake pigment, a metal oxide-coated stainless flake pigment, and a metal oxide-coated glass flake pigment, a hollow ceramic filler, and a vehicle. And a low-gloss metallic paint composition containing: 2. The low gloss metallic coating composition according to claim 1, wherein the metal oxide is titanium oxide or iron oxide. 3. The total of the solid content ratio (PWC) of the glittering pigment and the PWC of the hollow ceramic filler is 0.01 to 100 parts by weight of the solid content of the coating composition.
The low gloss metallic paint composition according to claim 1 or 2, wherein the ratio of PWC of the glitter pigment to PWC of the hollow ceramic filler is 10:90 to 90:10. 4. A base coat layer on a substrate,
A method for forming a multi-layer coating film by sequentially laminating a low-gloss coating layer formed of the low-gloss metal coating composition according to any one of the above. 5. A base coat layer on a substrate,
A method for forming a multi-layer coating film by sequentially laminating a low-gloss coating layer and a clear top coating layer formed by the low-gloss metal coating composition according to any one of the above. 6. The coating film forming method according to claim 4, wherein the lightness of the base coating layer is not more than N4 in a Munsell display system. 7. The method according to claim 1, wherein the clear top coat layer comprises (1) a carboxyl group-containing polymer and an epoxy group-containing polymer, (2) a fluororesin, or (3) a silicone resin.
The coating film forming method according to claim 5, wherein the coating film is formed from a paint containing: 8. The method according to claim 4, wherein the object to be coated is formed on the object to be coated.
A low-gloss metal-coated product, wherein a low-gloss coating film is formed by the coating film forming method according to any one of the preceding claims. 9. The low-gloss metallic coating according to claim 8, wherein the object to be coated is an aluminum wheel for automobiles.