JP4852251B2 - Paint composition - Google Patents

Description

The present invention relates to a coating film structure in which the color tone changes depending on the viewing angle by applying two or more layers of a coating material composed of colored glass beads having different colors or transparency or semi-transparency and a synthetic resin emulsion.

Conventionally, a bead layer in which a large number of glass beads as a catadioptric material are arranged on an object to be coated such as a steel plate, and two clear layers with different light absorption surrounding the bead layer are formed, and light is recurred by the beads. A coating film structure having a reflection function is disclosed (see Patent Document 1).
In addition, as a method of forming a stone-like paint film such as granite or marble like on the object to be coated such as the surface of a building, for example, finely ground natural stone or colored aggregate is included on the object to be coated. A method for applying an aggregate-containing paint has been disclosed (see Patent Document 2).
Furthermore, a construction method for a coating material that blends two kinds of colored glass beads having different average particle diameters and has excellent coating workability and a good finished appearance has been disclosed (see Patent Document 3).
However, these construction methods require a design based on reflection of light by glass or plastic beads and perspective of the surface of the undercoat layer.
JP 5-50030 A JP 2001-293435 A JP2001-106979A

An object of the present invention is to provide a coating film structure that has an appearance rich in design and changes in color tone depending on the viewing angle.

In order to solve the above problems, in the coating film structure in which an undercoat layer, an intermediate coat layer, and an overcoat layer are formed from the surface side of an object to be coated, the intermediate coat layer and the overcoat layer have a binder composed mainly of a synthetic resin emulsion, transparent It is composed of colored glass beads having transparency or translucency. Further, the binder mainly composed of a synthetic resin emulsion is formed of a clear resin having a transparent coating film.

As the sealer, a composition obtained by dissolving an epoxy resin, a urethane resin or the like in various organic solvents, or a resin emulsion such as an acrylic resin, an acrylic / styrene copolymer resin, a vinyl acetate resin, or an ethylene / vinyl acetate resin is used. The sealer penetrates into the object to be coated and prevents penetration and suction of the undercoat, and can secure the surface layer of the object to be coated and the adhesion of the coating material.

The coating material used in the undercoat layer, the intermediate coat layer, and the overcoat layer is mainly composed of a synthetic resin emulsion. As such a synthetic resin emulsion, an acrylate copolymer resin system, a vinyl acetate resin system, Ethylene-vinyl acetate copolymer resin, styrene-acrylate copolymer resin, vinyl acetate-acrylate copolymer resin, ethylene-vinyl chloride copolymer resin, vinyl acetate-veova copolymer resin, ethylene- Vinyl chloride copolymer resin-based, epoxy resin-based, urethane resin-based, silicon-modified acrylic resin-based, and fluorine resin-based emulsions can be used. It is also possible to do.

In addition, the above synthetic resin emulsion can be mixed with water and a thickener to adjust the viscosity, and as other additives, a film-forming aid, a dispersing agent, an antifoaming agent, an antiseptic, an antifungal agent, an antialgae An agent etc. are mix | blended as needed. Specifically, the thickener can be adjusted by using an appropriate amount of methylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylmethylcellulose and the like. Texanol, benzyl alcohol, butyl cellosolve, or the like is used as a film-forming aid, which makes it easy to form a coating film. As the dispersant, a nonionic surfactant, polyphosphate, or the like is used for ensuring the dispersion of the blended material, and a good dispersion effect is obtained. As the antifoaming agent, a silicon compound, an ether compound, a fatty acid ester compound, or the like is used, and bubbles in the coating film can be effectively eliminated. Halogen-containing nitrogen-sulfur compounds are used as preservatives, and deterioration due to decay of the paint can be prevented. Organic nitrogen sulfur compounds, nitrogen-containing organic cyclic compounds, nitrogen-containing halogen compounds, special urea compounds, etc. are used for fungicides and algae inhibitors. Sulfur compound systems are preferred. The blending ratio is not particularly limited as long as the desired coating film physical properties and coating workability can be adjusted, but as an example, the thickener is 100 parts by weight of the resin solid content of the synthetic resin emulsion. 0.2 to 6.0 parts by weight and other additives 0.2 to 6.0 parts by weight are blended.

In order to conceal the undercoat layer, it is preferable to add a filler to the paint based on the synthetic resin emulsion, and there is no particular limitation as long as it is used as a normal pigment or a concealing material. Specific examples include heavy calcium carbonate, kaolin, clay, porcelain clay, white carbon, talc, barite powder, precipitated barium sulfate, barium carbonate, titanium oxide, ferric oxide, carbon black, yellow lead, ocher, etc. In particular, titanium oxide is preferable because of its good concealability. The blending ratio is preferably one in which 20 to 100 parts of various concealing materials are kneaded with respect to 100 parts by weight of the resin solid content of the synthetic resin emulsion. When the amount is less than 20 parts by weight, sufficient concealability of the base cannot be obtained. When the amount is more than 100 parts by weight, problems such as poor coating workability and reduced adhesion occur.

Further, in order to smoothly apply the glass beads to the undercoat layer, it is preferable to add an aggregate to the paint based on the above synthetic resin emulsion, and there is no particular limitation as long as it is used as a normal aggregate. Specific examples include cryolite, quartz sand, pumice, and rubber chips. As a mixing ratio, 50 to 150 parts by weight of the aggregate is kneaded with 100 parts by weight of the coating composition prepared by adding a thickener, various additives, fillers, pigments, and water to the above synthetic resin emulsion. Is preferred. If the amount of aggregate is less than 50 parts, there will be a problem that a scouring wave remains on the base and the glass beads cannot be applied smoothly. On the other hand, when the amount is more than 150 parts, the coating workability is inferior and the adhesiveness is lowered.

The coating composition prepared by adding the above-described blended synthetic resin emulsion, thickener, additive, filler, pigment, and water is applied as an undercoat layer using a gold trowel so as to be smooth. The coating amount is preferably 0.5 to 1.8 kg / m ² in terms of concealability and coating workability.

Colored glass beads are blended in the intermediate coating layer and the top coating layer in order to improve the design of the coating film. The blending ratio of the coating composition to be blended is not particularly limited as long as the desired coating film physical properties and coating workability can be adjusted, but as an example, the synthetic resin emulsion (resin solid content 50%) 20 -30 parts by weight, 1.0-3.0 parts by weight thickener, 1.0-5.0 parts by weight additive, 100 parts by weight resin composition with 50-70 parts by weight water mixed with 300-500 parts by weight of colored glass beads A kneaded one is preferred. If the colored glass beads are less than 300 parts by weight, there will be a gap between the colored glass beads, resulting in poor design of the coating film. If it is more than 500 parts by weight, the coating workability will be inferior and the adhesiveness will be reduced. Problems occur.

The colored glass beads have transparency or translucency, and those having an average particle diameter of 0.8 to 2.0 mm are preferable because they improve the slipperiness and provide easy coating workability. There is no particular limitation as long as there is no hindrance to the subsequent design. It is also possible to mix and use colored glass beads having different colors in each of the intermediate coating layer and the undercoat layer.

The above-mentioned blended synthetic resin emulsion, thickener, various additives, colored glass beads, and coating composition prepared by adding water are applied as an intermediate coating layer and top coating layer using a gold trowel so as to be smooth. . The coating amount is preferably 1.0 to 2.0 kg / m ² from the viewpoint of coating workability.

If the surface of the object to be coated is uneven or cracked and cannot be completely covered with an undercoat layer, the surface of the object to be coated is roughened by sandpaper or blasting in advance and a smooth surface is formed by embedding a resin putty etc. It is necessary to. Furthermore, in order to further improve the coating workability and the adhesion of the coating film between the intermediate coating and the top coating, after adding and drying the intermediate coating, the resin added with the above synthetic resin emulsion and various additives It is also possible to form an overcoat layer after applying the composition.

In the coating film structure obtained by the present invention, the colored glass beads of different colors are divided into two layers, so that it was possible to obtain a coating film structure with excellent design that changes in color tone depending on the viewing angle.

Hereinafter, although an Example and a comparative example demonstrate concretely, implementation of this invention is not limited to this.

Example 1
A plaster board was used as a base, and an acrylic resin emulsion (manufactured by Aika Industry, JS-500) was applied and dried as a sealer.
For the undercoat material, 50 parts of 3 liters of cold water stone as an aggregate is added to 100 parts of an acrylic / styrene resin emulsion with 50% resin content (JP-100, JP 100). The prepared undercoat was coated with 1.5 kg / m ² iron and dried.
The intermediate coating material is an acrylic / styrene resin emulsion with a resin content of 50% {BASF, YJ-6221D} 25 parts, defoaming agent (ether compound) 0.1 part, film-forming aid (texanol) 3 0.1 part, dispersant (polyphosphate) 0.2 part, thickener (methylcellulose) 1.5 part, 100 parts of base paint prepared by mixing 70 parts of water and blue glass beads 400 having an average particle diameter of 1.2 mm The intermediate coating material prepared by blending the parts was coated with 1.8 kg / m ² iron and dried.
The top coating material was coated with 100 kg of the same base coating material as the intermediate coating with 400 parts of red glass beads having an average particle diameter of 1.2 mm and coated with 1.8 kg / m ^{2 of} iron coating. Painted.

Comparative Example 1
A plaster board was used as a base, and an acrylic resin emulsion (manufactured by Aika Industry, JS-500) was applied and dried as a sealer.
The undercoat material had the same composition and construction method as in Example 1.
The coating composition of Comparative Example 1 was the same as that of Example 1 except that the average particle diameter of the colored glass beads was 0.1 mm for the intermediate coating material and the top coating material.

Comparative Example 2
A plaster board was used as a base, and an acrylic resin emulsion (manufactured by Aika Industry, JS-500) was applied and dried as a sealer.
The undercoat material had the same composition and construction method as in Example 1.
For the intermediate coating material and the top coating material, the same composition and construction method as in Example 1 were used except that the average particle diameter of the colored glass beads was changed to 3.0 mm.

In the coating of Example 1, since the iron can be easily moved smoothly between the surfaces of the colored glass beads at the same level, the coating operation is extremely easy, and coating with a uniform thickness is possible. In addition, since the colored glass beads divided into two layers have different colors, designs with different color tones were obtained depending on the viewing angle.

In the coating of Comparative Example 1, since the average particle diameter of the colored glass beads was small, a uniform coated surface could not be obtained, resulting in unevenness and a smooth finish. Moreover, since the coating film was thin, the color tone did not change depending on the viewing angle.
In the coating of Comparative Example 2, since the average particle diameter of the colored glass beads was large, a uniform coated surface could not be obtained, resulting in unevenness and a smooth finish. In addition, the uneven color did not change the color tone depending on the viewing angle, and the beauty was impaired.

Sectional view of the coating film structure in the present invention

Explanation of symbols

1 Surface of workpiece
2 Undercoat layer
3 Intermediate layer
4 Topcoat layer

Claims (1)

In a coating film structure in which an undercoat layer, an intermediate coat layer, and an overcoat layer are formed from the surface side of an object to be coated, an undercoat layer containing 50 to 150 parts by weight of aggregate with respect to 100 parts by weight of a coating composition comprising a synthetic resin emulsion. 0.5 to 1.8 kg / m ^{2 is} applied with a trowel, and the undercoat layer is colored with an average particle diameter of 0.8 to 2.0 mm with respect to 100 parts by weight of a clear resin composition comprising a synthetic resin emulsion. An intermediate coating layer containing 300 to 500 parts by weight of glass beads is formed by applying 1.0 to 2.0 kg / m ² with a trowel , and 100 parts by weight of a clear resin composition comprising a synthetic resin emulsion is formed on the intermediate coating layer. The top coat layer containing 300 to 500 parts by weight of colored glass beads having an average particle diameter of 0.8 to 2.0 mm and different from the colored glass beads of the intermediate coating layer is 1.0 to 2.0 kg with a trowel. / ^{m 2} Coating structure characterized in that formed by the fabric.