JP2849454B2 - Pattern paint composition and method of forming pattern on substrate surface - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a pattern paint composition capable of exhibiting a stable and uniform grain-like or satin-like pattern, and a pattern on a substrate surface obtained by applying the composition. It relates to a forming method.

[Conventional technology]

At present, textured and satin-patterned designs are often used in instrument panels, console boxes, dashboards and video equipment, audio equipment, televisions and building interior and exterior walls for automotive interior parts. .

 Conventional methods for obtaining such a pattern design include (1) a method of applying a pattern paint and (2) a method of performing pattern processing on the substrate surface itself.

As an example of the former, first, there is a coating such as a sand lacquer paint for obtaining a pattern by two coatings or a chijimi paint for obtaining a pattern by utilizing the curing characteristics of a coating film. However, in these paints and coating systems, management of a coating process for obtaining a desired pattern is complicated, and there is a problem in reproducibility of the coated pattern. Next, there is a general pattern paint which obtains a pattern by containing resin particles such as inorganic or organic fillers and beads in the paint. However, in this paint system, a texture peculiar to a grain or satin pattern cannot be obtained simply by expressing the unevenness pattern of the coating film surface, and scratch resistance due to roughness of the painted surface or scratches due to nails is a problem. Have been.

Examples of the latter include a method of pre-patterning a molding die, a method of laminating a pattern film on the surface of a substrate, and a method of processing a chemical product. Lack of versatility due to difficulties such as limitations.

In conventional general pattern paints that exhibit a pattern by containing resin particles such as inorganic or organic fillers and beads in the paint, particles are condensed due to the dissolution phenomenon of the resin particles due to the solvent in the paint and the vehicle. Due to concerns such as a decrease in adhesion due to the transition to the phase, a solvent having excellent solvent resistance that hardly dissolves in the paint solvent is used. Therefore, in such paints, simply exhibiting uniform fine uneven patterns by individual resin particles on the paint surface,
A design peculiar to a grain-like or satin-like pattern cannot be obtained, and there is often a rough feeling of the painted surface, and the scratch resistance by nails or the like is often insufficient.

Generally, the solvent resistance of resin particles is determined from the gel fraction for various solvents (methyl ethyl ketone, acetone, toluene, methanol, etc.). However, the resin particles used for the general pattern paint have a gel fraction for these solvents. It shows almost 100% insolubility or poor solubility, and does not dissolve or partially dissolve in solvents in the paint composition. Therefore, the resin particles are uniformly present and the effect of including the resin particles is extremely poor. Poor pattern design, not much different from ordinary paint.

The present invention, in order to eliminate such conventional drawbacks, without using a special coating device and coating method for various substrates,
An object of the present invention is to provide a textured or matte-tone patterned coating film that is stable and uniform and has excellent touch feeling and scratch resistance.

Means for Solving the Problems] In order to achieve this object, in the present invention, the undissolved content (hereinafter, referred to as a gel fraction) at room temperature with respect to a solvent contained in a synthetic resin paint is 40% to 90%. Synthetic resin particles (hereinafter referred to as resin particles) are contained as a pattern-forming component.

In addition, the gel fraction with respect to the solvent at room temperature contained in the acrylic or polyester synthetic resin paint is 40-90%,
Synthetic resin particles having an average particle size of 5 to 100 μm are contained in the coating in an amount of 1 to 40% by weight as a solid content.

(Operation)

As described above, in the pattern paint of the present invention, the resin particles contained therein have a gel fraction of 40 to 90% with respect to the dissolution contained in the paint. A cohesion phenomenon is exhibited, whereby a pattern coating film with a clear grain-like or laser-like pattern and excellent pattern design can be formed as compared with the conventional pattern paint.

〔Example〕

The present inventors have conducted intensive studies on a pattern paint used as a pattern developing component of a resin particle. As a result, the resin particles having a gel fraction of 40 to 90% at room temperature with respect to a solvent contained in the paint are used as a pattern developing component. In such a case, it was found that a pattern which could not be obtained with a general pattern paint using a conventional filler or bead formulation was developed, and that the coating film had extremely little roughness and was excellent in scratch resistance. In other words, resin particles having a gel fraction in this range in a synthetic resin paint undergo partial dissolution and activation by the solvent in the paint, and appropriate aggregation occurs. Uneven grain-like or satin-like patterns are stably and uniformly expressed, and since such resin particles have excellent affinity with the coating resin vehicle, the coating surface has a soft touch feeling and excellent scratch resistance. Has the property.

 Hereinafter, the present invention will be described.

In the pattern paint of the present invention, the gel fraction of the resin particles used as the pattern expressing component is 40 to 90%. In other words, resin particles exhibiting a gel fraction within the above range in a synthetic resin paint are partially dissolved and activated by a solvent, and an appropriate agglomeration phenomenon occurs, which cannot be obtained by a general pattern paint using a conventional filler or bead formulation. The grain surface or satin pattern is stably and uniformly expressed, and since such resin particles have excellent affinity with the coating resin varnish, the coating film surface has a soft touch feeling and excellent scratch resistance. I found it to have.

If the gel fraction is less than 40%, the solvent in the paint will significantly dissolve the resin particles, causing the stability and adhesion of the paint to decrease. A problem arises in that it cannot be obtained.

When the gel fraction exceeds 90%, a specific pattern due to an appropriate aggregation phenomenon of the resin particles is not observed.

The shape and particle size of the resin particles can be arbitrarily selected depending on the intended pattern.
It is not restricted as long as it has a gel fraction of 40 to 90%, but the shape is preferably spherical in terms of the smoothness of the coating film surface and the soft touch feeling, and the particle size is Average particle size of 5 to 100 μm from the feeling of pattern and touch
The degree is preferred.

Examples of the resin particles include a urethane resin, an acrylic resin, a phenol resin, an epoxy resin, a melamine resin, and a polyolefin resin.The resin particles are similar to the paint resin in terms of affinity with the paint resin varnish and dispersibility. It is preferable to use However, the type is not limited as long as the resin particles have a gel fraction of 40 to 90% with respect to the solvent contained in the paint. That is, if the resin powder is adjusted to have a gel fraction of 40 to 90% with respect to the solvent contained in the paint, the present invention can be performed by selecting an appropriate type according to the paint system and required performance. A pattern paint can be obtained. The gel fraction of the various resin particles is determined by a method such as adjusting the degree of cross-linking or molecular weight. However, the present invention does not save the synthesis method, modification method, and the like for adjusting the gel fraction of the resin particles. It is to be noted that there may be no problem in using one colored with a coloring pigment, a dye, or the like, or in combination with various resin particles conventionally used, depending on the purpose of use or application.

The "synthetic resin coating" used in the coating composition of the present invention includes various known alkyd resin, polyester resin, polyurethane resin, acrylic resin, epoxy resin, vinyl chloride resin, and fluororesin types. Polyester resin, which is a resin-based paint with excellent overall performance such as weather resistance, chemical resistance, adhesion, and cost (for example, phthalic anhydride, isophthalic acid, maleic anhydride, terephthalic acid, trimellitic acid, adipine A one-component polyester resin or a melamine resin or a polyester resin obtained by ester condensation of a polybasic carboxylic acid component such as an acid and a polyhydric alcohol such as trimethylolethane, trimethylolpropane, neopentyl glycol, glycerin, and pentaerythritol; Two-component system with urea resin, isocyanate resin, etc.) Resin (e.g., methyl acrylate, ethyl acrylate, n- butyl acrylate, isobutyl acrylate, methyl methacrylate, n
-One-component acrylic copolymer based on butyl, isobutyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, or two-component acrylic resin, melamine resin, urea resin, and isocyanate resin) Is preferred. The selection of these synthetic resin coating systems may be made according to the suitability for adhesion to the substrate to be coated and the required performance, and it is not always necessary to make special adjustments for the purpose of the present invention.

The compounding amount of the resin particles in the synthetic resin paint should be in a range that does not adversely affect various properties such as adhesion, coating strength, and paint viscosity. The ratio varies depending on the affinity of the resin particles with the coating resin, the dispersibility, the desired pattern form, the gloss, and the like, but in general, a compounding ratio of 1 to 40% by weight as a solid content in the coating resin is appropriate. . The dispersion method in the paint may be a general and effective method such as disperser stirring, sand mill, but of course, poor dispersion may not be obtained due to particle destruction due to overdispersion. A suitable dispersion method for the paint system and resin particles should be selected.
In the case where the resin particles are contained in the paint by the above method and there is concern about the storage stability due to long-term storage, the resin particles may be used by dispersing them with a disper or the like immediately before coating. is there. In addition, extenders or matting agents (for example, calcium carbonate, kaolin clay, precipitated barium sulfate, silica, white carbon, magnesium carbonate, etc.), coloring pigments (titanium oxide, carbon black, etc.) according to a desired design and required performance. , Bengala, ultramarine, quinacridone, condensed azo, unnecessary azo,
Known paint formulations such as isoindolinone, phthaloshanine blue, pearl mica, aluminum powder, and other various additives can also be used.

The pattern paint of the present invention is applied by spraying, dipping,
General coating methods such as brush coating and roller coating can be applied, but spray coating is preferred from the viewpoint of workability and mass productivity.
In addition, as described above, it is possible to apply once to various materials by selecting a synthetic resin paint system.
An undercoat may be used for the purpose of stabilizing adhesion.

Next, the present invention will be described more specifically with reference to examples.
In the following, “parts” means “parts by weight”, and the viscosity means a value measured with a Ford cup # 4 (20 ° C.).

Example 1 <Acrylic urethane two-pack type paint> Composition Acridic A-801 (manufactured by Dainippon Ink; acrylic polyol) 50.0 parts Nitrocellulose 10.0 parts Carbon black 2.0 parts Ethyl acetate 15.0 parts Toluene 13.0 parts Cellosolve acetate 5.0 parts DC -3 (Toray Silicone; additive) 0.1 part Acrylic resin beads ^{* 1} 10.0 parts * 1 Gel fraction 80% for solvent in paint, average particle size
30 μm Sumidur N- as a curing agent for the above composition
After adding an equivalent amount of 75 (manufactured by Sumitomo Bayer: isocyanate resin) in an OH / NCO ratio, the viscosity was adjusted to 12 seconds with a mixed solvent of an equal amount of ethyl acetate and toluene, and spray-coated on an ABS substrate. After forced drying at 70 ° C. for 30 minutes, the specimen was left at room temperature for 3 days to prepare a test piece.

Example 2 <Urethane-based two-component paint> Formulation composition Deismohen 670 (manufactured by Sumitomo Bayer; polyester polyol) 40.0 parts Titanium white 10.0 parts Carbon black 1.0 part Syloid 244 (manufactured by Fuji Divison, silica-based matting agent) 5.0 parts Butyl acetate 10.0 parts Xylene 10.0 parts Solvesso 100 9.0 parts Cellosolve acetate 5.0 parts Antiterra U (BYK; additive) 0.2 parts Urethane resin beads ^{* 2} 20.0 parts * 2 Gel fraction 60% for solvent in paint, average particle size
45 μm Sumidur N- as a curing agent for the above composition
An equivalent amount of 75 (manufactured by Sumitomo Bayer; isocyanate resin) was added at an OH / NCO ratio, and the viscosity was adjusted to 16 seconds with a mixed solvent of an equal amount of butyl acetate and xylene. This was spray-coated on a bond steel plate coated with an epoxy-based primer (Origin Electric; Epona # 2000), forced dried at 120 ° C. for 30 minutes, and then left at room temperature for 3 days to obtain a test piece.

Example 3 <Acrylic lacquer paint> Composition Acridic A-196 (manufactured by Dainippon Ink; acrylic polyol) 50.0 parts Carbon black 0.2 part Alpate 1109MB (manufactured by Toyo Aluminum; aluminum paste)
5.0 parts Ethyl acetate 20.0 parts Toluene 10.0 parts n-butanol 12.0 parts DC-3 0.1 parts Acrylic resin beads ^{* 3} 3.0 parts * 3 Gel fraction 40% for solvent in paint, average particle size
20 μm The above composition was adjusted to a viscosity of 11 seconds with a mixed solvent of equal amounts of ethyl acetate, toluene and n-butanol, and spray-coated on a polystyrene substrate. After forced drying at 70 ° C. for 30 minutes, the specimen was left at room temperature for 3 days to prepare a test piece.

Example 4 Same as Example 3 except that the acrylic resin beads in the composition were phenol resin beads having a gel fraction of 90% with respect to the solvent in the paint and an average particle size of 20 μm. .

Example 5 <Urethane-based two-pack type coating composition> Burnok D6-439 (manufactured by Dainippon Ink; acrylic polyol) 50.0 parts Carbon black 1.0 part Shanin blue 5.0 parts Syloid 244 8.0 parts Ethyl acetate 15.0 parts Toluene 8.0 parts Cellosolve acetate 3.0 Part DC-3 0.2 part Urethane resin powder ^{* 4} 10.0 parts * 4 80% gel fraction to solvent in paint, average particle size
100 μm, pulverized particle product of urethane sheet (amorphous) The test method is the same as in Example 3.

Each of the coated test pieces obtained in Examples 1 to 5 exhibited a grain-like or leather-like coating surface appearance, and also had good touch feeling and scratch resistance. Also, the adhesion was equivalent to that of the composition containing no resin particles.

Comparative Example 1 The composition and the method of preparing the test piece were the same as in Example 1 except that the same type of beads having a gel fraction of 35% with respect to the solvent in the paint of the acrylic resin beads in the composition were used.

Comparative Example 2 The composition and the test piece preparation method were the same as in Example 2 except that the same type of beads having a gel fraction of 98% with respect to the solvent in the paint of the urethane resin beads in the composition were used.

The coated test piece obtained in Comparative Example 1 had bumps due to agglomeration of the resin beads and was poor in the design of the grain pattern.

The coated test piece obtained in Comparative Example 2 had the same pattern feeling as the conventional general pattern paint, had a rough touch, and had insufficient scratch resistance.

〔The invention's effect〕

As described above, by using the coating composition of the present invention, it is possible to easily obtain a stable and uniform grain-like or pear-finished pattern coating film that could not be obtained with a conventional pattern paint, and to form on a substrate. The resulting patterned coating film is excellent in performance such as touch feeling and scratch resistance. The pattern paint of the present invention can be applied to various substrates by selecting the paint resin system, and the pattern forming process is much simplified as compared with the conventional substrate surface pattern processing method. Can be
Fully compatible with industrial continuous production lines.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C09D 167/00 C09D 167/00

Claims (3)

(57) [Claims] 1. A synthetic resin pattern paint comprising synthetic resin particles as a pattern developing component, wherein the gel fraction of the synthetic resin particles with respect to a solvent contained in the paint is 40 to 90% at room temperature. Paint composition. 2. An acrylic or polyester synthetic resin paint having an average particle size of 5 to 100 μm and a gel fraction of 40 to 90% at room temperature with respect to a solvent contained in the paint. A pattern paint composition comprising 1 to 40% by weight as a component. 3. A method for forming a pattern on a substrate surface, comprising applying the pattern coating composition according to any one of claims (1) and (2) to a substrate.