JP3980032B2 - Decorative coating materials and decorative building materials - Google Patents

Description

  The present invention relates to a novel decorative coating material and decorative building material.

  Conventionally, as a material for decorating the inner and outer wall surfaces of a building, a coating material in which natural aggregate or artificial aggregate is blended with a binder such as a synthetic resin emulsion is often used. For example, in Japanese Patent Publication No. 2-40702 (Patent Document 1), as a coating material capable of forming a natural stone-like pattern, a binder that forms a colorless transparent film, a colored aggregate, and a transparent aggregate are used. A combined coating material is disclosed. In the coating material of Patent Document 1, transparent aggregates such as feldspar, chilled stone, and glass beads are supplementarily blended for the purpose of giving depth to the design that is expressed by the colored aggregate.

  On the other hand, Japanese Patent Application Laid-Open No. 2003-231862 (Patent Document 2) discloses a coating material containing a relatively large amount of transparent aggregate such as feldspar, cryolite, and glass beads. In Patent Document 2, the transparent aggregate content in the coating material solid content is set to 20 to 75% by weight in order to enhance the transparency and texture of the formed coating film. However, although a coating film obtained with such a coating material can provide a certain degree of transparency, it is difficult to obtain a finish with brightness, and there is room for improvement in terms of overall texture.

  As a technique for imparting a brightness feeling in an aggregate-containing coating material, it is known to mix mica in the coating material. For example, Japanese Patent Laid-Open No. 2001-3002 (Patent Document 3) discloses a decorative coating material including a colored aggregate having a particle size of about 1 to 200 μm, a mica having a size of 150 to 3.5 mesh, and a synthetic resin emulsion. It is disclosed. In this patent document 3, it is described that a brightness feeling is given by the effect of mica blending, and a pattern having a thickness close to that of natural stone can be formed.

Japanese Patent Publication No. 2-40702 Japanese Patent Laid-Open No. 2003-231862 JP 2001-3002 A

  Even in a coating material containing a high proportion of transparent aggregates such as feldspar, garnet, and glass beads, an improvement in luminance can be expected by blending mica as in Patent Document 3 above. However, in such a coating material, even if mica is actually blended to some extent, mica is visually buried in the formed coating film, and it is difficult to obtain a brightness improvement effect by mica blending.

  The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a feeling of brightness to a coating material containing a high proportion of transparent aggregates such as feldspar, cryolite, and glass beads, and to enhance the texture. It is what.

  As a result of intensive studies to achieve the above object, the present inventor has, as a result, a decoration containing a specific aggregate / pigment as an essential component in addition to a binder and a granular transparent aggregate having an average particle diameter of 0.05 to 5 mm. The inventors have conceived a decorative coating material, and further a decorative building material obtained by the decorative coating material, and have completed the present invention.

That is, the present invention has the following characteristics.
1. Binder (A), granular transparent aggregate (B) having an average particle diameter of 0.05 to 5 mm, scaly transparent aggregate (C) having an average particle diameter of 0.1 to 8 mm, and pearls having an average particle diameter of 1 to 600 μm The glossy pigment (D) is an essential component, and 100 to 4000 parts by weight of the granular transparent aggregate (B) and the scaly transparent aggregate (C) with respect to 100 parts by weight of the solid content of the binder (A). 1 to 500 parts by weight, 0.1 to 200 parts by weight of the pearl luster pigment (D), and a weight ratio of the flaky transparent aggregate (C) to the pearl luster pigment (D) is 1: 0. A decorative coating material characterized by being in a range of 05 to 1: 2 .
A decorative building material obtained by molding the decorative coating material described in 2.1. Into a sheet shape.

  According to the present invention, it is possible to impart a sense of brightness to a decorative coating material containing a high percentage of transparent aggregate and to enhance the texture thereof. The decorative coating material of the present invention is a material particularly suitable for trowel finishing. Moreover, the decorative coating material of this invention can also be used as a decorative building material previously shape | molded in the sheet form, and can display more stable coating-film performance in this decorative building material.

  Hereinafter, the best mode for carrying out the present invention will be described.

  As the binder (A) in the coating material of the present invention (hereinafter also referred to as “component (A)”), a water-soluble resin, a water-dispersible resin, a solvent-soluble resin, a solvent-free resin, a non-water-dispersed resin, Various binders such as a powder resin, or a binder obtained by combining these can be used. These may have crosslinking reactivity. Moreover, the form of (A) component is not specifically limited, Either 1 liquid type and 2 liquid type may be sufficient. In the present invention, a water-soluble resin and / or a water-dispersible resin is particularly preferably used. Examples of usable resins include cellulose, polyvinyl alcohol, ethylene resin, vinyl acetate resin, polyester resin, alkyd resin, vinyl chloride resin, epoxy resin, silicone resin, acrylic resin, urethane resin, acrylic silicon resin, fluorine Examples thereof include resins and the like, and composites thereof.

  The glass transition temperature of (A) component can be set suitably, and is about -50-50 degreeC normally. When using a water-dispersible resin as the component (A), if the glass transition temperature is set to −50 to 30 ° C. (more preferably −40 to 10 ° C.), the amount of the film-forming aid and the like can be reduced. In addition, a low VOC (low volatile organic compound) coating material suitable for interior finishing can be obtained.

  The granular transparent aggregate (B) (hereinafter referred to as “component (B)”) in the coating material of the present invention is a component that imparts transparency to the formed coating film. In the present invention, such a component (B) is contained at a relatively high ratio, so that it is possible to express a design having a translucent feeling mainly based on white. The component (B) can be used without particular limitation as long as such an effect can be exhibited. In addition, (B) component in this invention has a shape different from the below-mentioned (C) component.

  As the component (B) in the present invention, those having a light transmittance of 3% or more (preferably 3 to 50%, more preferably 10 to 30%) are suitable. Use of such a component (B) makes it easy to obtain an appropriate transparency and texture in the formed coating film. In addition, the light transmittance said here is the value of the total light transmittance by a turbidimeter. In this measurement, a sample of the component (B) is filled into a transparent glass cell having an inner thickness of 5 mm, and then gradually filled with water, and then the bubbles in the cell are removed by vibration. However, a sample having a particle diameter of 0.5 to 1.0 mm is selected and used.

  Specific examples of such a component (B) include feldspar, silica sand, silica stone, cryogenic stone, and glass beads. Among these, cryogenic stone is particularly suitable in the present invention.

  (B) The average particle diameter of a component is 0.05-5 mm normally, Preferably it is 0.1-2 mm. (B) When a component is too small, it will become easy to produce a crack in a coating film. When the component (B) is too large, the surface irregularities become large, which is disadvantageous in terms of design and texture. As the component (B), those having a particle diameter of more than 0.2 mm and 2 mm or less and an average particle diameter of 0.3 to 1.5 mm are particularly preferable. In addition, the average particle diameter of (B) component is a value obtained by sieving using the metal net sieve prescribed | regulated to JISZ8801-1: 2000, and calculating the average value of the weight distribution.

  (B) The mixing ratio of a component is 100-4000 weight part normally with respect to 100 weight part of solid content of (A) component, Preferably it is 200-2000 weight part. When the component (B) is such a mixing ratio, it is possible to impart an appropriate transparency to the formed coating film. When the component (B) is less than 100 parts by weight, it is difficult to obtain transparency and texture due to the component (B). When the amount of the component (B) is more than 4000 parts by weight, the ratio of the binder is relatively small, and problems such as the component (B) dropping off in the formed coating film are likely to occur.

  The scaly transparent aggregate (C) in the present invention (hereinafter referred to as “component (C)”) is an essential component for imparting a brightness to the formed coating film. Such (C) component should just have transparency in a scale-like thickness direction. In addition, the scale shape said to this invention is a flat shape which has a short axis 5 times or more (preferably 10 times or more) of thickness. The ratio of the minor axis to the major axis is usually about 1: 1 to 1: 5.

  Specific examples of the component (C) include muscovite, synthetic mica, silica flake, glass flake, and resin flake. Of these, muscovite is preferred.

(C) The average particle diameter of a component is 0.1-8 mm normally, Preferably it is 0.5-5 mm. If the average particle diameter of (C) component is in such a range, it is suitable in the point of the brightness | luminance feeling of a formed coating film, and a texture. As the component (C), those having a particle diameter of 0.9 mm or more and 8 mm or less and an average particle diameter of 1 to 5 mm are particularly preferable. In addition, the average particle diameter of (C) component is sifted using the metal net sieve prescribed | regulated to JISZ8801-1: 2000 similarly to the above-mentioned (B) component, and the average value of the weight distribution is obtained. It is a value obtained by calculating.
(C) The average thickness of a component is 1-500 micrometers normally, Preferably it is 5-200 micrometers. The average thickness said here can be calculated | required by calculating the average value of the value measured, for example with a micrometer.

  The mixing ratio of the component (C) is usually 1 to 500 parts by weight, preferably 5 to 100 parts by weight with respect to 100 parts by weight of the solid content of the component (A). When the component (C) is less than 1 part by weight, it is not possible to obtain a sufficient brightness feeling in the formed coating film. When the component (C) is more than 500 parts by weight, the overall texture is likely to be impaired.

  In the coating material of the present invention, by including the pearl luster pigment (D) (hereinafter referred to as “component (D)”) as an essential component, it is possible to sufficiently express the luminance feeling due to the blending of the component (C). The pearl luster pigment used in the present invention is an extremely thin scaly pigment having a high refractive index (average thickness is usually 0.05 μm or more and less than 1 μm), and exhibits pearl luster by multiple reflection of incident light. Specifically, as the component (D), a substrate such as muscovite, synthetic mica, silica flake, or glass flake coated with a metal or metal oxide can be used. Among these, as a metal contained in a metal or a metal oxide, titanium, iron, aluminum, zinc, tin, zirconium, cobalt, nickel, gold | metal | money, silver, etc. are mentioned. In addition, the average thickness of (D) component can be calculated | required by observation with an electron microscope.

(D) Although it is not clear about the action mechanism of the effect by component mixing, the following can be considered.
In general, when the component (C) is blended with a coating material containing a colored aggregate or the like, a brightness feeling is expressed by the light reflecting action of the component (C). However, when the component (C) is blended with a coating material containing the component (B) at a high ratio, the light reflection effect of the component (C) is reduced by the light transmittance of the component (B). As a result, the component (C) is visually buried, and a sufficient brightness improvement effect cannot be obtained.
On the other hand, in this invention, (D) component is mix | blended in addition to (B) component and (C) component. In the present invention, it is considered that the component (D) exhibits a light reflecting action in the vicinity of the front and back surfaces of the component (C) and makes the component (C) stand out. In particular, when a trowel finish is performed, the component (C) and the component (D) are easily arranged along the coating film surface, and the effect of the present invention becomes remarkable.

  The average particle size of the component (D) is desirably smaller than the average particle size of the component (C), and is usually 1 to 600 μm, preferably 1 to 180 μm, more preferably 5 to 80 μm. If the average particle diameter of (D) component exists in such a range, it is suitable at the point of the brightness | luminance provision in a formation coating film. In addition, the average particle diameter of (D) component is a value of the 50% particle diameter measured by the centrifugal sedimentation type particle size distribution measuring apparatus.

The mixing ratio of the component (D) is usually 0.1 to 200 parts by weight, preferably 0.5 to 100 parts by weight, more preferably 1 to 50 parts by weight with respect to 100 parts by weight of the solid content of the component (A). is there. Furthermore, in the present invention, the weight ratio of the component (C) to the component (D) is 1: 0.05 to 1: 2 (preferably 1: 0.1 to 1: 2, more preferably 1: 0.2. It is desirable to use both in combination so that ˜1: 1.5). Thus, by mixing the component (D), a sufficient luminance feeling can be obtained. When there are too few (D) components, only a coating film with a dull feeling of brightness can be obtained. When there are too many (D) components, there exists a possibility that the texture by (B) component and (C) component may be impaired.

  Although this invention coating material can be manufactured by mixing the said component uniformly by a well-known method, the other component which can be normally used for a coating material can also be mixed as needed. Examples of such components include coloring pigments, extender pigments, thickeners, film-forming aids, leveling agents, plasticizers, antifreezing agents, pH adjusters, diluents, antiseptics, antifungal agents, and algae. Agents, antibacterial agents, dispersants, antifoaming agents, ultraviolet absorbers, antioxidants, light stabilizers, fibers, catalysts, crosslinking agents and the like.

Moreover, as long as the effect of this invention is not impaired, aggregates other than the said (B) component and (C) component can also be mixed. Examples of such aggregates include natural aggregates such as natural stone and natural stone pulverized products, and artificial aggregates such as colored aggregates, alumina flakes, shell pieces, metal pieces, rubber pieces, plastic pieces, and the like. , Wood chips, etc., or those whose surfaces are colored and coated can be used. By blending such an aggregate, the hue and texture of the formed coating film can be adjusted. It is also possible to obtain an accented design. In addition, the aggregate mentioned here is usually opaque and does not have optical coherence.
Such an aggregate is desirably blended less than the total weight of the component (B) and the component (C). Specifically, when the total weight is 1, the ratio of the aggregate is 0.5 or less. (Preferably 0.2 or less).

  The decorative coating material of the present invention can be used mainly as a surface decorative material for buildings, civil engineering structures and the like. Applicable base materials include, for example, gypsum board, plywood, concrete, mortar, porcelain tile, fiber-mixed cement board, cement calcium silicate board, slag cement pearlite board, asbestos cement board, ALC board, siding board, extrusion board , Steel plate, plastic plate and the like. The surface of these base materials may have been subjected to some surface treatment (for example, a sealer, a surfacer, a filler, a putty, etc.). There may be. When performing surface treatment with a sealer or the like, it is desirable to set the hue of the sealer to the same color as the decorative coating material.

As a coating method of the coating material of the present invention, a known method can be adopted. For example, trowel coating, spray coating, roller coating, brush coating, and the like are possible.
Among these, in the present invention, a method of finishing a coated surface using a trowel is preferable. According to such a method, when the coating surface is leveled with a trowel, the component (C), the component (D), etc. are easily arranged along the coating surface, and the effect of the present invention is maximized. Is done. As the iron, for example, a gold iron or a wooden iron can be used. In addition, when apply | coating a coating material to a base material (distribution coating), of course, although a trowel can be used, other methods, for example, spraying, roller coating, etc., can also be employ | adopted.

The amount of coating at the time of coating is not particularly limited and can be set as appropriate. Usually, it may be about 0.5 to 8 kg / m 2 (preferably about 1 to 5 kg / m 2).
At the time of coating, the viscosity of the coating material can be appropriately adjusted by diluting with water or the like. The dilution ratio is usually about 0 to 10% by weight. The solid content at the time of coating is usually about 60 to 90% by weight.
The coating and drying of the coating material of the present invention may be usually performed at room temperature (about 5 to 40 ° C.). After coating, various uneven patterns can be formed by treating the coated surface with a roller, a trowel, a brush, a comb, a spatula or the like. When drying at room temperature, a cured coating film can usually be formed by providing a drying time of 24 hours or longer after application. In addition, drying of a coating material can also be performed under high temperature as needed.

After forming a coating film by the coating material of the present invention, a clear paint, a water repellent or the like can be applied as necessary. Among these, examples of the clear paint include acrylic resin-based paints, urethane resin-based paints, epoxy resin-based paints, acrylic silicon resin-based paints, and fluororesin-based paints. Such a clear paint can also adjust the degree of gloss by blending a matting agent or the like. Moreover, as long as the effect of this invention is not inhibited, coloring can also be given. As the water repellent, those having an alkoxysilane compound, a silicone resin or the like as a main component can be used.
As a method of applying such a clear paint or water repellent, a known method can be employed, and for example, spray coating, roller coating, brush coating, or the like can be employed.

  In the present invention, the decorative coating material can be formed into a sheet shape in advance. As a method for forming the decorative coating material of the present invention into a sheet shape, a known method may be adopted. For example, (i) a method of applying a decorative coating material to a support, or (ii) a decorative property A method of pouring a coating material into a mold and demolding after curing can be used. If necessary, a clear paint, a water repellent, or the like can be applied to the surface of the building material after molding.

  Examples of the support in the method (i) include woven fabric, non-woven fabric, ceramic paper, synthetic paper, glass cloth, mesh, gypsum board, plywood, slate plate, metal plate and the like. By using such a support, the strength and the like of the building material can be sufficiently ensured. When applying a decorative coating material to such a support, for example, a spray, a flow coater, a roll coater or the like can be used.

As the mold in (ii) above, for example, a mold made of silicon resin, urethane resin, or the like, or a mold provided with release paper can be used. When making the formwork side the building material surface, a desired uneven pattern can be given to the building material surface by adjusting the shape inside the formwork. In the case where the mold frame side is used as the building material back surface, the adhesiveness of the building material can be improved by forming irregularities on the back surface.
In the above (ii), a method using means such as a spray, a trowel, a reciprocator, or a coater can be employed instead of pouring. In addition, a support as described in (i) can be laminated. At the time of curing, heat treatment may be performed.

  The decorative building material as described above may be handled as a sheet-like molded body at the time of distribution, and may be applied to various base materials after being carried into a construction site such as a building or a civil engineering structure. What is necessary is just to stick to a base material using an adhesive agent, an adhesive, an adhesive tape, a nail, a collar, etc. when constructing a decorative building material. In addition, it can also be fixed using pins, fasteners, rails or the like. In the construction of decorative building materials, there are no problems such as scattering of materials by spray coating, etc., and it is excellent in terms of workability, and the coating film management is easy because it uses a pre-coated film at the factory. , Stable coating performance can be exhibited. The thickness of the decorative building material is not particularly limited, but is usually about 0.5 to 8 mm.

  Examples are given below to clarify the features of the present invention.

Example 1
700 parts by weight of granular transparent aggregate A, 700 parts by weight of granular transparent aggregate B, 20 parts by weight of flaky transparent aggregate, 200 parts by weight of pearl luster pigment, with respect to 200 parts by weight of water-dispersible resin (100 parts by weight of solid content) 10 parts by weight, 400 parts by weight of water, 10 parts by weight of a film-forming aid, 5 parts by weight of a thickener, and 5 parts by weight of an antifoaming agent are mixed together and stirred uniformly by a conventional method. Manufactured.

A white primer is applied to a 450 mm × 300 mm slate plate at a coating amount of 0.3 kg / m 2, dried for 4 hours, and the coating material 1 obtained by the above method is applied using a trowel to a coating amount of 2 kg / Painted with m2 and dried for 48 hours. The coating and drying of the coating material were all performed under standard conditions (temperature 23 ° C., relative humidity 50%).
When the appearance of the specimen obtained by the above method was confirmed, the finish was a white color tone, and both the transparency and the brightness were excellent.

In addition, the raw material used for manufacture of a coating material is as follows.
Water dispersible resin: acrylic resin emulsion (solid content 50%, glass transition temperature 18 ° C.)
-Granular transparent aggregate A: Suisui stone (average particle diameter 0.3 mm, light transmittance 16%)
-Granular transparent aggregate B: Suisui stone (average particle diameter 0.8mm, light transmittance 16%)
Scale-like transparent aggregate: muscovite (average particle diameter 2 mm, average thickness 40 μm)
-Pearlescent pigment: Titanium oxide-coated mica (average particle size 30 μm)
Opaque aggregate A: colored silica sand (orange, average particle size 150 μm)
・ Opaque aggregate B: Shell pieces (average particle size 3 mm)
-Film-forming aid: 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate-Thickener: Hydroxyethyl cellulose powder-Antifoaming agent: Silicone antifoaming agent (solid content 50% by weight)

(Example 2)
A coating material 2 was produced with the formulation shown in Table 1 and tested in the same manner as in Example 1. As a result, the obtained coating film had a slightly reddish white tone and was excellent in both transparency and brightness.

(Example 3)
A coating material 3 was produced with the formulation shown in Table 1 and tested in the same manner as in Example 1. As a result, the obtained coating film had a white color tone and was excellent in both transparency and brightness. In addition, the shell pieces added accentuated aesthetics.

(Example 4)
A coating material 4 was produced with the formulation shown in Table 1 and tested in the same manner as in Example 1. As a result, the obtained coating film had a slightly reddish white tone and was excellent in both transparency and brightness.

(Comparative Example 1)
A coating material 5 was produced with the formulation shown in Table 1 and tested in the same manner as in Example 1. As a result, the obtained coating film had a slightly reddish white color tone and had a sense of transparency and brightness, but had a slightly inferior appearance.

(Comparative Example 2)
A coating material 6 was produced with the formulation shown in Table 1 and tested in the same manner as in Example 1. As a result, the obtained coating film had a slightly reddish white color tone and had a transparent feeling and a luminance feeling, but the luminance feeling was somewhat insufficient.

(Comparative Example 3)
A coating material 7 was produced with the formulation shown in Table 1 and tested in the same manner as in Example 1. As a result, in Comparative Example 1, it was not possible to obtain a finished appearance as in the above examples.

(Example 5)
The coating material 1 of Example 1 was poured into a mold (length 300 mm × width 300 mm × depth 2 mm) coated with a release agent, and smoothed using a trowel. Sheet-shaped molded body 1 was obtained by demolding after curing at 23 ° C. for 48 hours. The appearance of the molded body obtained by the above method was a white color tone, and was excellent in both transparency and brightness. Further, when a plurality of sheet-like molded bodies 1 were attached to the wall surface of the gypsum board base using an acrylic resin adhesive, a stable decorative wall surface was obtained.

Claims (2)

Binder (A), granular transparent aggregate (B) having an average particle diameter of 0.05 to 5 mm, scaly transparent aggregate (C) having an average particle diameter of 0.1 to 8 mm, and pearls having an average particle diameter of 1 to 600 μm The glossy pigment (D) is an essential component, and 100 to 4000 parts by weight of the granular transparent aggregate (B) and the scaly transparent aggregate (C) with respect to 100 parts by weight of the solid content of the binder (A). 1 to 500 parts by weight, 0.1 to 200 parts by weight of the pearl luster pigment (D), and a weight ratio of the flaky transparent aggregate (C) to the pearl luster pigment (D) is 1: 0. A decorative coating material characterized by being in a range of 05 to 1: 2 .   A decorative building material obtained by molding the decorative coating material according to claim 1 into a sheet shape.