JP2002069380A - Coating composition and coated article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating material composition capable of providing a coating film having emphasized brilliant feeling at a highlight part regardless of a flat coating film, leaving the matted feeling at a shade part, having the brilliant feeling and the matted feeling expressed in a gradation state, and further having high decorative appearance, and further to provide a coated article obtained therefrom. SOLUTION: This coating material composition comprising (A) a flatting agent, (B) resin beads and (C) a brightening agent is characterized in that the coating composition comprises (A) 4-35 pts.wt. flatting agent, (B) 4-35 pts.wt. resin beads and (C) 2-20 pts.wt. brightening agent, regulated so that the total of the resin beads (B) and the brightening agent (C) may be >=37 pts.wt., based on 100 pts.wt. solid components of the coating material composition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating composition which can be suitably used for automobile interior parts such as instrument panels, center consoles and door rims, and weak electric parts such as radio cassette tape recorders and computer housings.

[0002]

2. Description of the Related Art Since automobile interior parts such as instrument panels, center consoles, and door rims are required to have a solid feeling and luxury, matte paints such as matte solid color and matte metallic color are applied. ing. Some weak electrical components such as radio cassette tape recorders and computer housings are also painted in matte solid color, matte metallic color, and the like.

[0003] As a matte paint, Japanese Patent Application Laid-Open No. 62-776 is known.
Japanese Patent Application Laid-Open No. 8 discloses a composition containing a synthetic resin, finely divided silica and synthetic mica. In recent years, new designs such as skeletons have been required for radio cassette tape recorders, computer housings, and the like, and consumer needs have diversified.

[0004] Japanese Patent Application Laid-Open No. 7-292311 discloses that in a paint containing a resin component as a main component from polyvinylidene fluoride and an acrylic resin, acrylic polymer beads and alumina fibers are added in a total amount of 1 to 30 wt. % Is disclosed. JP-A-7-292
No. 316 discloses a paint containing a polyester resin or a silicone polyester resin as a main resin component.
There is disclosed a paint for a metal plate containing acrylic polymer beads and alumina fibers in a total amount of 1 to 30% by weight in a coating film forming component. These are excellent in abrasion resistance, do not wear the forming roll at the time of forming, and can provide a warm, soft and finished appearance excellent in design.

Japanese Patent Application Laid-Open No. Hei 8-281202 discloses a method for producing an inorganic decorative board in which an undercoat is applied and then an overcoat containing color particles having a particle size of 20 to 360 μm and transparent particles having a particle size of 250 μm or less is repeatedly applied. It has been disclosed. The object of the present invention is to provide an inorganic decorative plate which is rich in design and excellent in durability by allowing color particles to be present in a coating film.

Japanese Patent Application Laid-Open No. 9-302272 discloses a thermosetting powder coating component having an average particle diameter of 10 to 200 μm for the purpose of forming a soft, highly designable, satin-like uneven pattern. A powder coating containing resin beads is disclosed.

Japanese Patent Application Laid-Open No. 10-85664 discloses a composite reaction of a thermoplastic acrylic resin, an aluminum powder having an average particle diameter of 10 to 15 μm, an organosilica sol and a cellulose derivative in addition to formation of a large number of streaks. There is disclosed a synthetic resin molded product obtained by applying an acrylic paint containing a product within a range of a film step of 10 to 60 μm. This allows a high-quality metallic finish to be obtained by considering the surface condition of the resin molded product before coating, in addition to the paint itself.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to provide a matte coating film, in which highlights are emphasized in highlights, matte remains in shades, and glitter and matte are in gradations. It is an object of the present invention to provide a coating composition capable of forming a coating film having a high design property, and a coated article obtained thereby.

[0009]

The present invention relates to a coating composition containing a matting agent (A), a resin bead (B) and a glittering material (C), wherein the solid content of the coating composition is 100 parts by weight. 4 to 35 parts by weight of the matting agent (A), 4 to 35 parts by weight of the resin beads (B), and 2 to 35 parts by weight of the glittering material (C).
A coating composition comprising 20 parts by weight, wherein the total of the matting agent (A), the resin beads (B), and the glittering material (C) is 37 parts by weight or more. Hereinafter, the present invention will be described in detail.

The present inventors have proposed the transparency, light reflectivity and diffusivity of the resin beads (B), the matting effect of the matting agent (A), and the luster of the luster material (C). By combining the feelings, it is possible to make use of the glitter and hue of the glittering material, despite being a matte paint, the glitter is emphasized in the highlight part, the matte feeling remains in the shade part, and the glitter and matte feeling are The present inventors have found that a coating film expressed in a gradation state can be formed, and have completed the present invention.

In the present invention, by including a matting agent (A), a resin bead (B) and a glittering material (C) at a specific ratio in the coating composition, glittering is emphasized in a highlight portion, It is possible to obtain a coating film exhibiting a novel design property in which a matt feeling remains in the shade portion and the glittering feeling and the matte feeling are expressed in a gradation state.

In the present invention, the matting agent (A) is used to make the resulting coating film matt and to exhibit a particularly matte feeling in the shade portion. As the matting agent (A), commercially available amorphous matting agents can be used. For example, organic matting agents such as silk protein (silk ground product) and polyethylene wax; talc, calcium carbonate , Clay, kaolin, silica and the like. In the present invention, an organic matting agent such as silk protein is preferred in that an elegant matte feeling can be obtained. Silk protein is particularly preferred because it exhibits not only an elegant matte feeling but also a high-class design.

The matting agent (A) has an average particle size of 1-2.
Those having a thickness of 0 μm are preferred. If it is less than 1 μm, the matte feeling and the shading feeling of the shade portion may decrease or disappear. If it exceeds 20 μm, a matte feeling is obtained, but the glittering feeling is reduced or lost. More preferably, 2-1
0 μm. However, when the extender is used as the matting agent (A) of the present invention, the average particle size is 15 μm.
Is preferable, and by using this, a matting effect can be exhibited.

The matting agent (A) contains 4-35 parts by weight based on 100 parts by weight of the solid content of the coating composition.
If the amount is less than 4 parts by weight, the matt feeling and the shading feeling in the shade portion may be reduced or eliminated. If the amount exceeds 35 parts by weight, a matte feeling is obtained, but the glittering feeling is reduced or lost. More preferably, it is 6 to 28 parts by weight.

In the present invention, by blending the resin beads (B), the glitter is enhanced in the highlight portion,
A so-called gradation state is exhibited in which the matt feeling remains in the shade portion, and the glittering feeling and the matte feeling continuously change depending on the viewing position.

The resin beads (B) have an average particle size of 5 to 5.
It is preferably 20 μm. If it is less than 5 μm,
There is little glitter. If it exceeds 20 μm, the glittering appearance looks coarse. The resin beads (B) are preferably transparent resin beads. In the case of opaque colored resin beads, the characteristics of the resin beads (B) cannot be maximized.

As the resin beads (B), spherical ones are preferable. For example, acrylic resin beads, urethane resin beads, polyester resin beads, polyamide resin beads, polystyrene resin beads, polyethylene resin beads, melamine resin beads, urea resin Beads, fluororesin beads, polyacrylonitrile resin beads and the like can be mentioned.

The resin beads (B) contain 4 to 35 parts by weight based on 100 parts by weight of the solid content of the coating composition. If the amount is less than 4 parts by weight, a matte feeling is obtained, but a glittering feeling is reduced. If it exceeds 35 parts by weight, there is a brilliant feeling,
Matte feeling is reduced. More preferably, it is 6 to 28 parts by weight.

In the present invention, the glittering material (C) exhibits a glittering property in a highlight portion. As the brilliant material (C), a brilliant material that is usually used for a brilliant paint such as a metallic paint or a pearl mica paint can be used.
For example, colored mica powder provided with iron oxide coating, colored pigment coating, etc .; aluminum foil; MIO (m
icaseous iron oxide). Preferably, mica powder and aluminum foil are used. In order to express stable glitter, matte feeling and gradation, it is better to use colored mica powder,
More preferred.

The glitter material (C) is contained in an amount of 2 to 20 parts by weight based on 100 parts by weight of the solid content of the coating composition. If the amount is less than 2 parts by weight, the glitter decreases, and if it exceeds 20 parts by weight, the effect of the glitter does not change much and is not economical. Preferably, it is 4 to 17 parts by weight.

In the present invention, the matting agent (A),
The sum of the resin beads (B) and the glitter material (C) is
It is at least 37 parts by weight based on 100 parts by weight of the solid content of the coating composition. When the amount is less than 37 parts by weight, the resulting coating film has a small brilliant feeling in a highlight part and a matte feeling in a shade part,
Brightness and matte feeling are not expressed in a gradation state. Preferably, it is at least 40 parts by weight. The matting agent (A), the resin beads (B), and the glittering material (C)
Can be used alone or in combination of two or more.

The coating composition of the present invention may further contain a coloring pigment and / or an extender pigment in addition to the matting agent (A), the resin beads (B) and the glittering material (C). . The color pigment is not particularly limited, for example, azo chelate pigment, insoluble azo pigment, condensed azo pigment, phthalocyanine pigment, indigo pigment, perinone pigment, perylene pigment, dioxane pigment, quinacridone pigment, isoquinone Organic coloring pigments such as indolinone pigments and metal complex pigments; and inorganic coloring pigments such as graphite, yellow iron oxide, red iron oxide, carbon black, and titanium dioxide. As the extender, the matting agent (A)
And the extender pigments exemplified above. When added as an extender without aiming at the matting effect, the average particle diameter is 1 to 15 μm, and it is added in an amount of 3 parts by weight or less in 100 parts by weight of the solid content of the coating composition. it can. As the pigment, one or a combination of two or more of color pigments and extenders can be used.

The total amount of the matting agent (A), the resin beads (B), and the glittering material (C) to which a coloring pigment and an extender are further added is 100% of the solid content of the coating composition.
It is preferable that it is 40 to 60 parts by weight in the weight part. 4
If the amount is less than 0 parts by weight, the gloss of the coating film is excessively improved, resulting in poor concealment, and a mat feeling and a shading feeling are reduced or lost. If the amount exceeds 60 parts by weight, the gloss of the coating film is reduced, there is no glitter, and the scratch resistance is reduced.

The coating composition of the present invention comprises a resin binder,
If necessary, the composition contains a curing agent and additives. The resin binder is not particularly limited, and examples thereof include an acrylic resin, a urethane resin, a polyester resin, a polyamide resin, a polystyrene resin, a polyethylene resin, a fluororesin, and a polyacrylonitrile resin. When the coating composition is a solvent-based resin, the resin binder is a resin that dissolves in the solvent used, and is different from the resin beads (B). The resin binder preferably has a number average molecular weight of 1,000 to 30,000. If it is less than 1,000, the coating film properties are inferior and 3
If it exceeds 0000, the viscosity of the coating composition itself becomes high, resulting in poor workability.

The curing agent is not particularly limited and can be selected according to the resin binder, and examples thereof include a melamine resin, a polyisocyanate compound, and a blocked isocyanate compound. Examples of the additive include conventionally known additives such as a surface conditioner, a viscosity controller, an anti-bake agent, and an organic solvent.
Examples of the viscosity control agent include swelling dispersions of fatty acid amides, amides such as amide fatty acids and phosphates of long-chain polyaminoamides; polyethylenes such as colloidal swelling dispersions of polyethylene oxide; organic acids Organic bentonites such as smectite clay and montmorillonite; inorganic pigments such as aluminum silicate and barium sulfate; and flat pigments which exhibit viscosity depending on the shape of the pigment.

The coating form of the coating composition of the present invention may be of a solvent type, a high solid type, an aqueous type or a powder type, and may be of a one-pack type, a two-pack type or a multi-pack type. Also, the hue may be light or dark.

[0027] The coating composition of the present invention comprises, according to the form of the coating, the above-mentioned matting agent (A), the above-mentioned resin beads (B) and the above-mentioned brilliant material (C), a pigment, a resin binder and other components. It can be obtained by a method known to those skilled in the art, such as kneading and dispersing using a mill, a disper, or the like.

The coating composition of the present invention can be used for various substrates, for example, plastics, metals, glass, foams, and molded articles thereof, and is preferably used for plastic molded articles such as polypropylene. be able to. Specific examples include automobile interior parts such as an instrument panel, a center console, and a door rim; and weak electric parts such as a radio cassette tape recorder and a computer housing.

The above substrate is preferably coated with a primer in advance, and the coating composition of the present invention can be applied thereon as a top coat by wet-on-wet, and then dried and formed into a film. As the primer, properties usually required as a primer, that is, adhesion to a coating film formed from the substrate and the coating composition of the present invention, and
There is no particular limitation as long as the solvent resistance, coating film hardness and the like are good, and existing ones can be used.

The method for applying the coating composition of the present invention to the above-mentioned substrate is not particularly limited.
A roll coater method or the like can be used, and the coating can be usually performed to a dry film thickness of 20 to 40 μm. Drying,
The method for forming a coating film is not particularly limited, and examples thereof include room temperature drying, forced drying, room temperature curing, and baking curing. The baking time may be, for example, 5 to 30 minutes at 80 to 150 ° C.

The coating film formed from the coating composition of the present invention preferably has a 60-degree gloss value of 0.3 to 1.5. In the present specification, the 60-degree gloss value refers to JIS K
5400 means the specular reflectance at 60 degrees performed in accordance with 6.7. If it is less than 0.3, the glitter will decrease and the scratch resistance will also decrease. When the ratio exceeds 1.5, the matte feeling and the shading are lost. More preferably,
0.4 to 1.0.

The coated article coated with the coating composition of the present invention, while being a matte coating film, has a brilliant feeling in the highlight part, a matte feeling in the shade part, and a brilliant and matte feeling in the shade part. It has a coating film with a novel design that is expressed in a gradation state. Particularly, despite the fact that the matting agent (A) is blended, the glitter of the glitter material (C) is emphasized in the highlight portion by the combination with the resin beads (B) and the glitter material (C), The glittering feeling and the matte feeling are expressed in a gradation state. Further, since the coating composition of the present invention can provide a coating film having a solid feeling and a high-grade feeling as a whole, it can be particularly suitably used for automobile interior parts and the like.

[0033]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples. Preparation Example Preparation of Pigment Paste Color pigments, extender pigments, acrylic resin varnishes and xylenes of the blending amounts (parts by weight) shown in Table 1 were dispersed by a sand grinder mill, and black pigment paste 1, black pigment paste 2, and red pigment paste were respectively obtained. Thus, a blue pigment paste was obtained. Table 1
Medium, colored pigment black is Monarch 1300 (Cabot Specialty Chemicals, Inc.), colored pigment red is Synchasia Red YRT759D (manufactured by Ciba Specialty Chemicals), and colored pigment blue is cyanine blue G314.
(Manufactured by Sanyo Dyeing Co., Ltd.), extender pigment is Microace P4 (talc; manufactured by Nippon Talc Co .; particle size: 1.5 μm), and acrylic resin varnish is manufactured by Nippon Bee Chemical Co. (weight average molecular weight: 50,000; OH value: 140) Tg-20 ° C .; solid content 65% by weight). In Table 1, solid parts by weight are shown in parentheses.

[0034]

[Table 1]

Example 1 A coating liquid was prepared by the following procedure using each raw material having the compounding amount shown in Table 2. First, the glitter and ethyl acetate were dispersed with a disper, and then an acrylic resin varnish was added with stirring to sufficiently disperse the glitter and the acrylic resin varnish. Furthermore, a matting agent, a resin bead, a pigment paste, and a surface conditioner as an additive are stirred under a disper,
A coating solution was obtained by successive addition. The amount of the acrylic resin varnish in Table 2 is an amount not including the acrylic resin varnish in the pigment paste, and is an amount added separately. 9.1 parts by weight of a curing agent (9.1 parts by weight of solids) was mixed with 151.5 parts by weight (solids of 90.9 parts by weight) of the obtained coating liquid to obtain a coating composition.

In Table 2, the matting agent was silk protein powder GSF (manufactured by Idemitsu Techno Fine Co .; average particle size 8 μm).
m), the transparent resin beads are Artpearl G400BK (manufactured by Negami Industry Co., Ltd .; average particle size: 13 μm)
-1, exterior marine rasette (red; Engelhard Asia Pacific, Inc.); glittering aluminum foil C2; Alpaste FZU40C (manufactured by Toyo Aluminum Co., Ltd.);
(Shin-Etsu Chemical Co., Ltd.) and Coronate HX (Nippon Polyurethane Industry Co., Ltd.) was used as a curing agent.

The obtained coating composition was treated with a thinner of ethyl acetate / ethyl-3-ethoxypropionate = 50/50 at 20 ° C. and 15% with a # 4 Ford cup viscometer.
And a polypropylene primer (RB-182; manufactured by Nippon Bee Chemical Co., Ltd.) with a dry film thickness of 13 μm, spray-coated, and baked and cured at 80 ° C. for 30 minutes. To obtain a coating film having a dry film thickness of 35 μm (total dry film thickness of 48 μm).
m). The evaluation was performed according to the following evaluation method. The results are shown in Table 2.

[0038]Evaluation method  (1) Gloss value of 60 degrees According to JIS K 5400 6.7, gloss value of 60 degrees
The specular reflectance of the sample was measured. (2) Brightness The test piece was slightly bent, and the brightness of the rounded coating film was visually observed.
And evaluated on a 5-point scale from 1 (bad) to 5 (good)
Was. (3) Matte feeling The test piece was slightly bent, and the matte feeling of the rounded coating film was observed.
Judgment is made visually, and a five-level evaluation is performed from 1 (bad) to 5 (good).
Was. (4) Gradation The test piece was slightly bent, and the brightness was increased from the bright part of the rounded coating film.
Visually determine the degree to which the change to the
A two-stage evaluation of good to good (good) was made.

Examples 2 to 13 and Comparative Examples 1 to 5 Coatings were prepared, coated and evaluated in the same manner as in Example 1 except that the formulations shown in Tables 2 to 4 were used. Table 2 shows the results
~ Shown in Table 4. In Tables 2 to 4, the glittering material mica powder C1-
No. 2 used Iridion 221WII (blue type; manufactured by Merck Japan Ltd.), and glittering material mica powder C1-3 used Exterior Marlin Fine Green (green type; Engelhard Asia Pacific, Inc.).

[0040]

[Table 2]

[0041]

[Table 3]

[0042]

[Table 4]

From the results in Tables 1 to 4, the matting agents (A),
The coating compositions of Examples 1 to 13 containing the resin beads (B) and the glittering material (C) at specific ratios have good glittering feeling in highlight portions and matte feeling in shade portions, and they are in a gradation state. Had been expressed. On the other hand, in Comparative Example 1 containing no matting agent (A), there was no matte feeling,
There was no gradation effect. The coating compositions of Comparative Examples 2 to 5 containing the matting agent (A), the resin beads (B) and the glittering material (C) in a range outside the proportions of the present invention have an impression that both glittering and matte feelings are blurred. there were.

[0044]

As described above, the coating composition of the present invention has the above-mentioned structure, so that it is a matte coating film, but the highlight is emphasized in the highlights, the matte remains in the shade, the glitter and the matte It is possible to form a coating film having a high design property in which the feeling is expressed in a gradation state.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4J038 BA192 CB022 CC032 CD092 CG142 CG162 DA142 DA162 DD002 DG002 DH002 HA026 HA066 HA216 HA286 HA446 HA526 HA536 HA546 KA07 KA08 KA15 KA20 MA14 NA01

Claims (7)

[Claims] 1. A coating composition comprising a matting agent (A), a resin bead (B) and a glittering material (C), wherein the matting agent (A) is contained in 100 parts by weight of a solid content of the coating composition. ) To 4 to 3
5 parts by weight, 4 to 35 parts by weight of the resin beads (B), 2 to 20 parts by weight of the glittering material (C), the matting agent (A), the resin beads (B) and the glittering material ( A coating composition, wherein the total of C) is at least 37 parts by weight. 2. The matting agent (A) has an average particle size of 1 to 20.
μm is a matting agent, the resin beads (B) are transparent resin beads having an average particle size of 5 to 20 μm, and the glittering material is
The coating composition according to claim 1, which is a mica powder and / or an aluminum foil glittering material. 3. A coating composition comprising 100 parts by weight of solids,
6 to 28 parts by weight of the matting agent (A), 6 to 28 parts by weight of the resin beads (B), and 4 to 17 parts of the glittering material (C)
3. The coating composition according to claim 1, wherein the total amount of the matting agent (A), the resin beads (B), and the glittering material (C) is 40 parts by weight or more. 4. The coating composition according to claim 1, wherein the matting agent has an average particle size of 2 to 10 μm. 5. A matting agent (A), a resin bead (B), a glittering agent (C) containing a coloring pigment and / or an extender pigment in 100 parts by weight of a solid content of the coating composition. The total of the coloring pigment and the extender pigment is 40 to 60 parts by weight, and the 60-degree gloss value of the coating film formed from the coating composition is 0.3 to 1.5. 5. The coating composition according to item 4. 6. The coating composition according to claim 1, wherein the 60-degree gloss value of the coating film formed from the coating composition is 0.4 to 1.0. 7. A coated article obtained by coating the coating composition according to claim 1, 2, 3, 4, 5 or 6.