JPH0860043A - Film forming composition and film forming method - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a film-forming composition and a film-forming method that have a deep color tone peculiar to natural stone and can be applied to thin and flat uniform slate-like building materials that can be manufactured in a factory. . [Structure] Colored aggregate having an average particle size of 0.1 to 1.0 mm 5
25% by weight, average particle size 0.1-1.0 mm, hiding rate 2
20 to 60% by weight of inorganic particles of 0 to 90%, color developing agent 25 to
50% solids by weight, and at least one of polyvinyl chloride thickener and maleic anhydride copolymer thickener
A film-forming composition for a ceramic building material plate, which comprises 0.1 to 1.0% by weight of solid content of colored seeds.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film-forming composition and a film-forming method used for forming a natural stone pattern such as a marble pattern, a granite pattern, an obsidian pattern, etc. on a ground such as a building, furniture or ornament.

[0002]

2. Description of the Related Art Natural stone is often used as a surface material for buildings, furniture, figurines, etc., and the transparency and deep and calm color tone peculiar to natural products contribute to the improvement of quality by creating a high-class feeling. ing. However, natural stone has drawbacks such as difficulty in acquisition and cost, and difficulty in processing.

Various attempts have been made to solve these problems and develop a technique for artificially forming a natural stone pattern.
In JP-A-52-137436, colored silica stone particles obtained by baking and fixing an inorganic pigment to silica stone particles are mixed in a synthetic resin emulsion to prepare a coating material, and the surface of the coating material applied to the surface of a building is roughened. There is disclosed a technique for providing fine unevenness. However, this technique was merely for alleviating the monomorphism of the paint without deteriorating weather resistance and the like.

JP-A-53-16045 discloses a composition in which a synthetic resin emulsion contains an alkaline aqueous solution of silicon and the surface of a natural ore aggregate such as silica stone, marble and mica, and a modified alkali silicate as a binder. There is disclosed a technique in which a water-based multicolor paint is obtained by containing a specific amount of the colored aggregate coated with. However, this is also a technology that simply maintains the color tone in order to alleviate the monomorphism of the paint and creates an aesthetic appearance similar to stone material, and in the technology that enhances the sense of quality and imparts the same texture as natural materials. There wasn't.

In Japanese Patent Laid-Open No. 55-5965, in order to maintain a uniform multicolored color when forming the surface of a fine uneven coating similar to the above, a specific room temperature drying type coating or the like is added in a synthetic resin emulsion. A technique in which the formed colored aggregate is contained is disclosed. Japanese Patent Laid-Open No. 61-195172
Japanese Patent Laid-Open Publication No. 2003-242242 discloses a technique for preventing color unevenness or the like by similarly mixing a colored paint and a coated aggregate to form a finely uneven paint surface. However, these techniques have merely been for the purpose of alleviating the monomorphism of the paint and producing an aesthetic appearance similar to stone.

The deep pattern peculiar to natural stone is irradiated on the surface because the rock-forming substances constituting the natural stone have different crystal forms, optical properties, color tones, etc., and are mixed in various proportions. Depending on its location, light is reflected on the surface, penetrates inside, is reflected at the boundary surface of the rock forming material, is refracted and is amplified as surface reflected light, and these are combined to create a multiple and calm, deep luster. Is due to appear. Focusing on this, Japanese Patent Publication No. 2-40702 discloses that
A technique has been disclosed in which a deep color tone peculiar to the natural stone is obtained by blending a specific amount of a specific colorant, a transparent binder and an aggregate.

Further, in Japanese Unexamined Patent Publication (Kokai) No. 4-202264, on the premise of the above technique, in order to obtain a film-forming composition having a delicate pattern with the transparency and depth of natural stone, a binder is used. , A coating composition containing an aggregate, a coloring pigment other than a white pigment and an additive, and a coating composition in which only the pigment is replaced with a different coloring pigment are simultaneously sprayed from separate outlets of the multi-head spray gun, A technique of rolling the roller is disclosed.

[0008] The above-mentioned technique is a technique with a wide range of applications, making good use of the characteristics of the color tone of natural stone. However, essentially, it is still a technique for obtaining a natural stone texture by roughening the surface of the substrate to impart fine irregularities.

[0009]

By the way, in recent years, the mass production of buildings, furniture, figurines, etc., which are the subject of the above-mentioned technology, has progressed, and in particular for buildings, there is less need for surface coating on site. Surface coating has already been completed at the time of factory shipment of building materials, and a construction method has been developed in which those building materials are simply pasted on site. Under these circumstances, it is necessary to mold the surface-painted building material into a uniform slate and ship it from the factory. Therefore, there has been a demand for a film-forming composition and a film-forming method which have a thinner and flat surface coating and have the above-described transparency and depth of natural stone.

However, the above-mentioned technique is basically based on obtaining a natural stone texture by roughening the surface of the substrate to give fine irregularities, and is a technique premised on construction at the site. , A thick film of about 1 to 3 mm is essential, and it cannot be applied for a thin and flat uniform slate-like building material having a thin film of about 20 to 150 μm. In addition, the thick film is inferior in drying property, and is not suitable for production in a factory.

In view of the above, the present invention provides a film-forming composition and a film-forming method which have a deep color tone peculiar to natural stone and can be applied to a thin and flat uniform slate-like building material that can be produced in a factory. It is intended to be provided.

[0012]

The gist of the present invention is to provide a film-forming composition containing a colored aggregate 5 having an average particle size of 0.1 to 1.0 mm.
-25% by weight, average particle size 0.1-1.0 mm, hiding ratio 20-90% inorganic particles 20-60% by weight, color spreader 25
To 50% solids by weight, and at least one of polyvinyl chloride thickener and maleic anhydride copolymer thickener, 0.1 to 1.0% solids by weight. is there. Note that the above content does not include the amount of water or an additive such as a dispersant, an antifoaming agent, or an antiseptic agent contained in the color developing agent. The present invention is described in detail below.

The first component of the film-forming composition of the present invention is
It is a colored aggregate having an average particle size of 0.1 to 1.0 mm. The material of the aggregate is not particularly limited, and for example, usual natural materials such as fluorite, silica sand, and quartz; ground ceramic particles, calcium carbonate particles, mica particles, and the like can be used by a usual method. The colored aggregate can be obtained by coating the aggregate with a paint. As a paint for such coating, good adhesion with aggregate,
A reaction-curable resin coating material having good alkali resistance and weather resistance is preferable, and examples thereof include coating materials made of acrylic silicone resin, acrylic urethane resin, fluorine resin and the like.

The above-mentioned colored aggregate has an average particle size of 0.1 to 1.
It is 0 mm. If it is less than 0.1 mm, the transparency becomes poor, and if it exceeds 1.0 mm, thin film coating becomes difficult.
Limited to the above range. More preferably, 0.2-0.
It is 5 mm. The colored aggregate is contained in 5 to 25% by weight of the entire film-forming composition of the present invention. If it is less than 5% by weight, the color tone is not clear, and if it exceeds 25% by weight, a flat color tone is obtained, so that it is limited to the above range. It is preferably 10 to 25% by weight, more preferably 10 to 25% by weight.
It is 20% by weight.

The second component of the film-forming composition of the present invention is
Inorganic particles having an average particle size of 0.1 to 1.0 mm and a hiding rate of 20 to 90%. The material of the inorganic particles is not particularly limited, and examples thereof include silica stone powder, calcium carbonate powder, silica powder, talc powder, and clay powder. The average particle size of the inorganic particles is 0.1 to 1.0 mm.
If it is less than 0.1 mm, the transparency will be poor and 1.0 mm
If it exceeds, the thin film coating becomes difficult, so it is limited to the above range. More preferably, it is 0.2 to 0.5 mm.

The hiding ratio of the above inorganic particles is 20 to 90%.
Is. Here, the hiding rate is a numerical value measured by the following. That is, a color developing agent and inorganic particles to be described later are mixed at a solid content weight ratio of 1: 1 and dried at 60 ° C. for 10 minutes, and then an amount of a film thickness of 200 μm is applied to a hiding rate test paper, It is a numerical value obtained by measuring the hiding ratio in accordance with JIS K 5400 7.2. When the hiding ratio of the above-mentioned inorganic particles is less than 20%, the depth is lost, and when it exceeds 90%, the transparency is deteriorated, so the content is limited to the above range.

The above-mentioned inorganic particles are contained in an amount of 20 to 60% by weight based on the whole film-forming composition of the present invention. If it is less than 20% by weight, the smoothness of the coated surface will be poor, and if it exceeds 60% by weight, the transparency will be poor, so that it is limited to the above range. It is preferably 30 to 60% by weight, and more preferably 30.
~ 50% by weight.

The third component of the film-forming composition of the present invention is
It is a color-developing agent. The color-developing agent is contained to form a colorless and transparent dry film, and is usually called a vehicle. The color developing agent is not particularly limited, and examples thereof include emulsion type ones such as acrylic resin, acrylic urethane resin, and fluororesin. In the present invention, the color-developing agent is contained in an amount of 25 to 50% by weight based on the total weight of the film-forming composition of the present invention as a solid content weight.
Include. In a normal film-forming composition, the amount of the color-developing agent used is relatively small, and for example, Japanese Patent Publication No. 2-40702.
In the technique disclosed in the publication, the amount is about 5 to 20% by weight, but the present invention is characterized in that a relatively large amount of the color developing agent is used. If the amount of the color-developing agent is less than 25% by weight, the coating film strength will be weak, and if it exceeds 50% by weight, the smoothness of the coated surface will be poor, so the amount is limited to the above range. It is preferably 30 to 50% by weight, and more preferably 30.
-40% by weight.

The fourth component of the film-forming composition of the present invention is
It is a thickener. The thickener has a low viscosity of about 5 to 20 poise, maintains fluidity, and functions to prevent the colored aggregate and the inorganic particles from precipitating. The thickener comprises at least one of a polyvinyl chloride thickener and a maleic anhydride copolymer thickener. Thickeners other than polyvinyl chloride thickeners or maleic anhydride copolymer thickeners are not suitable for use as the thickener of the present invention.

The above-mentioned thickener is contained in an amount of 0.1 to 1.0% by weight based on the total weight of the film-forming composition of the present invention as a solid content weight. If it is less than 0.1% by weight, the thickening effect becomes insufficient,
If it exceeds 1.0% by weight, the viscosity becomes too high, so the content is limited to the above range. It is preferably 0.1 to 0.8% by weight, and more preferably 0.1 to 0.5% by weight.

The article to be coated with the film-forming composition of the present invention is a colored uneven pattern ceramic building material plate. The colored uneven pattern ceramic building material plate is a ceramic building material plate, having an uneven pattern,
The surface is colored. In light of the gist of the present invention, the ceramic building material plate has a natural stone pattern and an uneven pattern, but the material and manufacturing method are not particularly limited.

When the surface of the ceramic building material plate has a weak surface strength or a large amount of water elutes, the uneven ceramic material plate can be reinforced and coated with a waterproof sealer before use. The above-mentioned concavo-convex ceramic building material plate is uniformly covered by coloring. Such coloring can be performed by applying an undercoat enamel paint. Examples of the undercoat enamel paint include solvent-based paints and emulsion-based paints using acrylic resin, acrylic silicon resin, acrylic urethane resin, fluorine resin and the like.

The film-forming composition of the present invention can be applied to the surface of the ceramic building material plate with a colored uneven pattern thus prepared. Such coating can be performed, for example, by spraying with a spray coating machine. When using a spray coating machine, for example, 2.0 to 3.
By using a spray gun with a diameter of about 5 mm,
Can be applied uniformly.

The film-forming composition of the present invention has a dry film thickness of 2
Paint so that the thickness is 0 to 150 μm. If it is less than 20 μm, uniform coating becomes difficult, and if it exceeds 150 μm, the drying property is poor, so that it is limited to the above range. Preferably,
30 to 150 μm, more preferably 50 to 10 μm
0 μm.

The film-forming composition of the present invention can be suitably applied to a natural product pseudo pattern such as a natural stone pattern, but the invention is not limited thereto and, for example, it can be applied to a geometric pattern or the like. Good.

In the film-forming composition, the smoothness of the coating surface to be formed can be obtained by increasing the amount of the colored aggregate contained, but this increases the hiding ratio of the coating film too much. It loses the good permeability characteristic of the present invention. Further, when the amount of the colored aggregate contained in the film-forming composition is reduced to reduce the hiding rate and improve the permeability, the smoothness of the surface of the coating film is lost and the lysine finish-like unnatural feeling is produced. Will result. Therefore, in the present invention, when it is desired to obtain a smooth surface, the average particle size of the colored aggregate and the average particle size of the inorganic particles contained in the film-forming composition are made equal to each other, so that good permeability is obtained. In addition, it is possible to obtain a smooth coated surface.

[0027]

The film-forming composition of the present invention has a high blending ratio of the color-developing agent contained therein as compared with the usual film-forming composition.
Very good permeability. Therefore, the light passing through the film formed by the film-forming composition of the present invention is highly reflected on the surface of the undercoat enamel coating, and a good transparency can be obtained. Inorganic particles contained in the film-forming composition of the present invention,
Since the hiding rate is small, the transparency is extremely good and the color of the base can be sufficiently exhibited.

The effect of specifying the hiding ratio of the inorganic particles according to the present invention will be described in more detail. As described above, the hiding ratio of the inorganic particles is as follows. And a coating film having a thickness of 200 μm was formed and measured based on the JIS. Therefore, if the same inorganic particles as measured can be packed without any gap, the film thickness should be 100 μm (assuming that the specific gravity of all the constituents is 1). On the other hand, the coating film formed from the composition of the present invention has a maximum dry film thickness of 150 μm when the largest amount of inorganic particles is used, and the maximum amount of inorganic particles is 60% of the total solid content. When the film thickness is calculated under the same assumption as above, it becomes 90 μm.

That is, the inorganic particles having a hiding ratio of 90% (maximum value) measured by the above-mentioned JIS are 150 μm.
Even if 60% by weight (maximum value) is added to a thick coating film (maximum dry film thickness), the hiding ratio is always 90% or less. As a result, as shown in the schematic diagram of FIG. 1, since the incident light 1 from the surface of the coating film 5 hits the undercoat surface 2 of the building material plate 6, the inorganic particles 3 or the colored aggregate 4 and is reflected, a deep color is obtained. Can be obtained.

By making the average particle size of the colored aggregate and the inorganic particles contained in the film-forming composition of the present invention equal, and by limiting the type of thickener, the leveling effect at the time of film formation is exhibited. By further increasing the blending amount of the color-developing agent, the coating film surface of the film-forming composition of the present invention can be made smooth, so that diffuse reflection of light on the coating film surface is prevented. You can By combining the above effects, the coating film formed by the film-forming composition of the present invention can obtain a good sense of depth unique to the present invention, even though it is a thin film. Since the amount of the colored aggregate and the inorganic particles contained in the film-forming composition of the present invention is not more than the limiting pigment volume concentration, sufficient film strength can be obtained even when the film thickness is thin.

[0031]

The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. Example 1 Mitsui Wood Industry Co., Ltd. Century board stone pattern blue gray color coated plate with silica sand having a particle size distribution of 0.1 to 0.5 mm in acrylic silicone reaction curable resin paint ocher color,
Blue and red colored aggregates and 0.
Acrylic urethane resin reaction-curable paint with mica particles with a particle size distribution of 3 to 0.8 mm, colored aggregate, and silica powder with a particle size distribution of 0.1 to 0.4 mm (silica sand No. 8; concealment rate) 65%), additives (dispersing agent, defoaming agent, preservative) and the like were blended as shown in Table 1 to prepare a coating composition having a viscosity of 10 poise (25 ° C.). The water in the table is mainly the water content of the acrylic resin emulsion. Then, this composition was mixed with a spray gun having a diameter of 2.5 mm.
50 g / m ² (dry film thickness 80 to 90 μm) was applied and dried.

Evaluation was made by the following evaluation methods, and the results are shown in Table 6.
It was shown to. After the dry coating, it was dried at 70 ° C. for 10 minutes, a century board plate was overlaid, a load of 0.3 kg / cm ² was applied, the mixture was left for 10 minutes and then removed, and the state of the coating film was observed and evaluated. The appearance of the coated plate was evaluated as if it had a deep appearance or a smooth coated surface, and the appearance was similar to that of natural stone, and an average value was given. Evaluation criteria 5 Equivalent to natural stone 4 Approximate to natural stone 3 Somewhat approximate to natural stone 2 Not very similar to natural stone 1 Far from natural stone and poor finish

Example 2 A colored aggregate coated in the same manner as in Example 1 and 0.
Calcium carbonate powder (heavy carbon N; concealment rate 88%) having a particle size distribution of 1 to 0.4 mm is blended as shown in Table 2, and the viscosity is 1
A 5 poise (25 ° C.) coating composition was prepared. Then, this composition was mixed with a spray gun having a diameter of 3.5 mm to
00 g / m ² (dry film thickness 60 to 70 μm) was applied and dried.

Example 3 A colored aggregate coated in the same manner as in Example 1 and 0.
Silica powder having the particle size distribution of 1 to 0.4 mm (the same product as in Example 1) and clay powder (Clay No. 1; concealment rate 45%) were blended as shown in Table 3, and the viscosity was 5 poise (25 ° C). A coating composition was prepared. Then, this composition was treated with a spray gun having a diameter of 2.0 mm to obtain 150 g / m ² (dry film thickness 40
˜50 μ) Painted and dried.

Comparative Example 1 A colored aggregate coated in the same manner as in Example 1 and 0.
Silica stone powder having the particle size distribution of 1 to 0.4 mm (the same product as in Example 1) was blended as shown in Table 4 to prepare a paint having a viscosity of 80 poise, and 1000 was prepared using a 7.0 mm caliber spray gun.
g / m ² coated and dried.

Comparative Example 2 A coating composition having a viscosity of 10 poise was blended and prepared in the same manner as in Comparative Example 1 except for the amount of the thickener, 200 g / m ^{2 was} coated by using a spray gun having a diameter of 3 mm, and dried.

COMPARATIVE EXAMPLE 3 The procedure of Example 1 was repeated except that the silica powder was replaced with heavy coal having a particle size distribution of 0.02 to 0.1 mm (concealment rate 95%), and the viscosity was 10 poise (25 ° C.). Mix and prepare paint, 3
A spray gun having a diameter of mm was used to apply 200 g / m ^{2 and the} coating was dried.

Comparative Example 4 Silica powder is a glass having a particle size distribution of 0.1 to 0.4 mm.
A paint having a viscosity of 10 poise (25 ° C.) was blended and prepared in the same manner as in Example 1 except that the powder (concealment rate 12%) was used, and a spray gun having a diameter of 3 mm was used to obtain 200 g / m 2.
² Painted and dried.

[0039]

[Table 1]

[0040]

[Table 2]

[0041]

[Table 3]

[0042]

[Table 4]

[0043]

[Table 5]

[0044]

[Table 6]

[0045]

EFFECTS OF THE INVENTION According to the present invention, since a thin film having good permeability can be formed, it is possible to obtain a film forming composition and a film forming method suitable for factory coating of building materials for buildings.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a coated surface of a film-forming composition of the present invention.

[Explanation of symbols]

 1 Light Input 2 Undercoat Surface of Building Material Plate 3 Inorganic Particles 4 Colored Aggregate 5 Coating Film 6 Building Material Plate

Claims (3)

[Claims] 1. Inorganic particles having an average particle size of 0.1 to 1.0 mm, 5 to 25% by weight, and inorganic particles having an average particle size of 0.1 to 1.0 mm, and a hiding ratio of 20 to 90%, 20 to 60% by weight. , Color developer 2
5 to 50% solids by weight, and at least one of polyvinyl chloride thickeners and maleic anhydride copolymer thickeners, and 0.1 to 1.0% solids by weight. A film-forming composition for a ceramic building material plate having a colored uneven pattern. 2. The film forming composition for a colored uneven pattern ceramic building material plate according to claim 1, wherein the average particle size of the colored aggregate is equal to the average particle size of the inorganic particles. 3. An uneven porcelain ceramic building material plate is color-coated with an undercoat enamel paint, and then the film-forming composition according to claim 1 or 2 is applied so as to have a dry film thickness of 20 to 150 μm. Method for forming a film.