JP2010005836A - Pattern-printed coating film formed on building material board and its forming method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pattern-printed coating film which can give clear and uniform picture quality efficiently even when there is unevenness on the surface to be printed of a building material board and can also express an uneven feel which can not be expressed by the conventional printing method and to provide an aqueous, particulate substance fixative. <P>SOLUTION: The pattern-printed coating film formed on a building material board is composed of: an aqueous base coating film; a film of an aqueous, particulate substance fixative; a particulate printed pattern fixed by the film of the aqueous, particulate substance fixative; and an aqueous clear coating film. The film of the aqueous, particulate substance fixative is a coating film obtained by coating with an aqueous, particulate substance fixative in 20-160 g/m<SP>2</SP>in terms of the coating amount of the coating liquid. The thixotropy index of the aqueous, particulate substance fixative is 1.5-10, and the hardness of the film-forming resin contained in the film of the aqueous, particulate substance fixative is F or lower than F in terms of pencil hardness at 10°C. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pattern printing coating film, a method for forming a pattern printing coating film, and an aqueous particulate fixing agent used for forming a pattern printing coating film, and in particular, a pattern printing coating film and a pattern printing coating that can express a tactile sensation due to unevenness. The present invention relates to a film forming method and a particulate water-based fixing agent used for forming a pattern printing coating film.

  One method for forming a pattern on a substrate is stencil printing. In this stencil printing, as represented by screen printing, a stencil having a pattern formed thereon is prepared, and colored resin particles such as ink are extruded from the stencil and printed on a substrate to be placed under the stencil. .

For example, in screen printing, a stencil with a pattern is made of nylon ^(trademark) , tetron ^(trademark) , stainless steel or other woven fabric on a frame, and a plate film (resist) is formed by an optical engineering method or the like. Close the eyes of the fabric. Colored resin particles such as ink are pressed from above the stencil with a spatula-shaped rubber plate called a squeegee, permeate through the plate hole where there is no stencil film, and a pattern is formed on the substrate under the stencil. Is done.

  According to this screen printing, the ink layer printed on the substrate can be thickened, and since the stencil is flexible, it is not restricted by the shape of the substrate, even if it is curved or three-dimensional. Printing is possible.

  However, in the conventional stencil printing, since the stencil and the printing material have to be brought into contact with each other, printing is almost impossible when the printing surface of the printing material has undulations. Further, since the stencil and the substrate are in contact with each other, in a rotary printing apparatus that supports high-speed printing, it is necessary to set the rotation speed of the stencil and the conveyance speed of the substrate to be the same speed. It was. For this reason, when changing the printing conditions such as the printing length of the substrate, it is necessary to replace the stencil and change the rotation speed each time, which reduces the mass productivity.

  In order to solve such problems, various printing methods have been devised. For example, colored resin particles that are separated from a stencil and a printing material, are charged with colored resin particles such as ink, and are charged from the plate hole with a brush or the like. A printing method is known in which colored resin particles are adhered to a printing material by extruding stencil and forming an electrostatic field between the stencil and the printing material (see Patent Document 1).

  According to this method, even when the printing surface of the printing material has undulations, it is possible to efficiently print uniform image quality. Further, since the stencil and the printing material are separated from each other, it is not necessary to synchronize the rotation speed of the stencil and the conveyance speed of the printing material. In addition, when changing printing conditions such as the printing length of the substrate, there is no need to replace the stencil, etc., and high mass productivity is maintained by interlocking changes in the rotation speed of the stencil and the conveyance speed of the substrate. It is possible to change the printing conditions as it is.

  However, in the printing method disclosed in Patent Document 1, the colored resin particles that can be used are limited to powder coatings that are charged by friction. Furthermore, the colored resin particle layer on the printed surface to be formed is thin and smooth, and it is difficult to form irregularities, and it is impossible to express the tactile sensation due to the irregularities on the printed surface. Specifically, for example, when the printing material is a building material for sandstone-like walls, sandstone-like colors and patterns can be printed, but sandstone-like tactile sensation cannot be expressed.

  Patent Document 2 discloses a pattern-printed coating film formed on a printing material, a sealer layer that covers the surface of the printing material, an aqueous base coating film that covers the sealer layer, and the aqueous base coating film A granular printing pattern formed thereon, and an aqueous clear coating film that covers the aqueous base coating film and the granular printing pattern, wherein the granular printing pattern is formed into a pattern shape by using a stencil printing system. The particles constituting the granular printing agent, which are formed by drop printing, have at least 1/10 of the volume embedded in the aqueous base coating film, and the aqueous portion of the embedded portion is the aqueous It describes a picture printing coating film in which the pigment volume concentration in the base coating film is not more than the critical pigment volume concentration. However, in the production of this picture printed coating film, when the burial level of the particles is less than 1/10, the particles are easily detached, and the particles are detached from the picture, so that a desired picture is obtained. There was a problem of disappearing. In addition, when the pigment volume concentration in the aqueous base coating film is equal to or higher than the critical pigment volume concentration, the aqueous base coating film becomes brittle, the particles are easily detached, the particles are detached from the pattern, and the desired pattern is obtained. There was a problem that it could not be obtained.

JP 2003-182024 A JP 2006-198588 A

  The present invention has been made in view of the problems as described above, and even when the printed surface of the building material board that is the printed material has undulations, a clear and uniform image quality can be obtained, and the unevenness can be obtained. It is an object of the present invention to provide a picture-printed coating film and an aqueous particulate fixing agent having excellent adhesion stability that can express even the tactile sensation.

  In order to achieve the above object, the present inventors conducted extensive research. As a result, an aqueous base coating film and a granular aqueous fixing agent film are formed on the building material board, and then the granular printing material is dropped and printed into a pattern by a stencil printing system to form a granular printing pattern, and then an aqueous clear coating is applied. It discovered that the said subject could be solved by coat | covering with a film | membrane, and came to complete this invention. More specifically, the present invention provides the following.

The present invention
It is a pattern printing coating film formed on a building material board,
This design print coating film,
A water-based base coating that covers the surface of this building material board,
A granular aqueous fixing agent film formed on at least a part of the aqueous base coating film,
A granular printed image fixed by the granular aqueous fixing agent film, and an aqueous clear coating film covering the aqueous base coating film, the granular aqueous fixing agent film and the granular printed pattern;
A multi-layer coating composed of
This granular printing pattern is a pattern formed by dropping and printing a granular printing material into a pattern by a stencil printing system,
The granular aqueous fixing agent film is a coating film obtained by coating a granular aqueous fixing agent at a coating liquid coating amount of 20 to 160 g / m ² , and the granular aqueous fixing agent includes an acrylic emulsion and an acrylic silicon emulsion. A film-forming aqueous resin selected from the group consisting of a fluorine resin emulsion and a urethane dispersion; and a viscosity modifier;
The thixotropic index of this granular aqueous fixing agent is 1.5 to 10,
The hardness of the film-forming resin contained in the granular aqueous fixing agent film is F or F lower than the pencil hardness at 10 ° C.,
A printed pattern is provided, and the above object is achieved.

  The granular printing material is preferably at least one selected from the group consisting of sand, dredged sand, color sand, beads, color chips, mineral chips, glass chips, wood chips, pigments, and color beads.

  It is preferable that a sealer layer is further provided between the building material board and the aqueous base coating film.

The present invention is also a method for forming a pattern print coating film formed on a building material board, comprising the following steps:
Coating a water-based base coating composition on a building material board to form a water-based base coating,
A step of applying a granular aqueous fixing agent on the entire surface of the obtained aqueous base coating film at a coating liquid coating amount of 20 to 160 g / m ² to form a granular aqueous fixing agent film;
On the obtained granular aqueous fixing agent film, the granular aqueous fixing agent film is wet and the granular printing material is dropped into a pattern using a stencil printing system to fix the granular printing pattern, And applying an aqueous clear coating composition to form an aqueous clear coating for coating the aqueous base coating, the particulate aqueous fixer film and the granular printed pattern:
Including at least
The particulate aqueous fixing agent is a fixing agent including at least a film-forming aqueous resin selected from the group consisting of an acrylic emulsion, an acrylic silicon emulsion, a fluororesin emulsion, and a urethane dispersion; and a viscosity modifier.
The thixotropic index of this granular aqueous fixing agent is 1.5 to 10,
The hardness of the film-forming resin contained in the granular aqueous fixing agent film is F or F lower than the pencil hardness at 10 ° C.,
Also provided is a method of forming a pattern printed coating.

The present invention is also a method for forming a pattern print coating film formed on a building material board, comprising the following steps:
Coating a water-based base coating composition on a building material board to form a water-based base coating,
A step of applying a granular aqueous fixing agent to a part of the obtained aqueous base coating film at a coating liquid coating amount of 20 to 160 g / m ² to form a granular aqueous fixing agent film;
On the obtained granular aqueous fixing agent film, the granular aqueous fixing agent film is wet and the granular printing material is dropped into a pattern using a stencil printing system to fix the granular printing pattern, And applying an aqueous clear coating composition to form an aqueous clear coating for coating the aqueous base coating, the particulate aqueous fixer film and the granular printed pattern:
Including at least
The particulate aqueous fixing agent is a fixing agent including at least a film-forming aqueous resin selected from the group consisting of an acrylic emulsion, an acrylic silicon emulsion, a fluororesin emulsion, and a urethane dispersion; and a viscosity modifier.
The thixotropic index of this granular aqueous fixing agent is 1.5 to 10,
The hardness of the film-forming resin contained in the granular aqueous fixing agent film is F or F lower than the pencil hardness at 10 ° C.,
Also provided is a method of forming a pattern printed coating.

  Before or after the step of fixing the granular printing pattern and before the step of forming the aqueous clear coating film, a step of dropping the granular printing material on the granular aqueous fixing agent film in a wet state; Is more preferable.

  The aqueous clear coating composition for forming the aqueous clear coating film more preferably contains the particulate aqueous fixing agent.

  In the step of fixing the granular printing pattern, the granular printing material is dropped and printed in a pattern on the wet granular aqueous fixing agent film using a stencil printing system, and then the excess granular printing material is air blown. More preferably, it is a step of fixing the granular printed pattern by removing with.

The present invention is further a granular aqueous fixing agent for a pattern printing coating film used for fixing a granular printing material,
The particulate aqueous fixing agent includes at least a film-forming aqueous resin selected from the group consisting of an acrylic emulsion, an acrylic silicon emulsion, a fluororesin emulsion, and a urethane dispersion; and a viscosity modifier.
The thixotropic index of this granular aqueous fixing agent is 1.5 to 10,
The hardness of the film-forming resin contained in the granular aqueous fixing agent is F or F lower than the pencil hardness at 10 ° C.,
A particulate aqueous fixer is also provided.

  The present invention further includes sand, cinnabar sand, color sand, beads, color chips, mineral chips, glass chips, wood chips, pigments, and color beads as the granular printing material in the method for forming a picture-printed coating film. There is also provided a design design method for a picture printed coating film formed on a building material board, characterized by using a material selected from the group.

  According to the present invention, it is possible to provide a picture-printed coating film and an aqueous particulate fixing agent capable of expressing clear and uniform image quality and also expressing tactile sensation due to unevenness that could not be expressed by conventional printing methods. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Pattern Printed Coating Film A cross-sectional view of a pattern printing coating film 10 according to the present invention is shown in FIG. As shown in FIG. 1, a picture print coating film 10 according to the present invention is applied to a building material board 1 which is an object to be printed, an aqueous base coating film 3, a granular aqueous fixing agent film 4, a granular printing picture 5, and an aqueous clear coating film. 6 are sequentially formed. A sealer layer 2 may be further provided between the building material board 1 and the aqueous base coating film 3 as necessary. As is apparent from FIG. 1, the surface of the coating film is uneven, and the tactile sensation due to the unevenness can be expressed.

Building material board The building material board 1 as a printing material used in the present invention is not particularly limited, and for example, ceramic siding materials and slate plates can be used.

Sealer layer In the present invention, the sealer layer 2 provided between the building material board 1 and the water-based base coating film 3 may be formed by applying a sealer coating composition on the building material board with airless spray or the like as necessary. it can. As the sealer coating composition used to form the sealer layer 2, conventionally known ones can be used. For example, an acrylic emulsion sealer “Audite 126 Sealer” manufactured by Nippon Paint Co., Ltd. can be used.

Aqueous base coating film The aqueous base coating film 3 is formed by coating an aqueous base coating composition. By providing the aqueous base coating film, the design property of the resulting building material board can be improved, and the adhesiveness of the particulate aqueous fixing agent film can be improved. As the water-based base coating composition, conventionally known ones can be used. For example, intermediate coatings and top coatings commercially available from Nippon Paint Co., Ltd. For intermediate coating, rolls, and ode power top coatings of various hues can be used. As the aqueous base coating composition used for forming the aqueous base coating film, two or more types of aqueous base coating compositions may be used depending on the design of the picture printing coating film formed on the building material board.

Granular Aqueous Fixer Film The particulate aqueous fixer film 3 is formed by coating a granular aqueous fixer. The particulate water-based fixing agent includes a film-forming resin containing at least one selected from the group consisting of an acrylic emulsion, an acrylic silicon emulsion, an organic-inorganic composite emulsion, a fluororesin emulsion, and a urethane dispersion, and a thixotropic index. An aqueous base coating composition containing a viscosity control agent adjusted to 5 or more and 10 or less is used.

  As the acrylic emulsion that can be used as the film-forming resin, conventionally known ones can be used, for example, those obtained by copolymerizing acrylic monomers and other ethylenically unsaturated monomers as necessary. Can be used. Specifically, as acrylic monomers, acrylic acid or methacrylic acid methyl ester, ethyl ester, propyl ester, n-butyl ester, i-butyl ester, t-butyl ester, 2-ethylhexyl ester, lauryl ester, phenyl Ester, benzyl ester, 2-hydroxyethyl ester, 2-hydroxypropyl ester, Plaxel FM-1 (polycaprolactan adduct of methacrylic acid 2-hydroxyethyl ester, manufactured by Daicel Chemical Industries, Ltd.), acrylamide, N -Methylol acrylamide, acrylonitrile, (meth) acrylic acid ester of polyhydric alcohol, etc. are mentioned. Examples of other ethylenically unsaturated monomers include styrene, α-methylstyrene, itaconic acid, maleic acid, vinyl acetate, and divinylbenzene.

  A conventionally well-known thing can be used also about the acrylic silicon emulsion which can be used as a film-forming resin. Specifically, in addition to those obtained by graft-polymerizing organopolysiloxane to the above acrylic emulsion, or those obtained by copolymerizing an alkoxysilane monomer having an ethylenically unsaturated group and an ethylenically unsaturated monomer, alkoxysilane or its Examples thereof include those obtained by copolymerizing an acrylic monomer having a functional group that reacts with an alkoxysilyl group in the presence of a hydrolysis condensate and an ethylenically unsaturated monomer. Examples of the alkoxysilane monomer having an ethylenically unsaturated group include 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropyltriethoxysilane, 3-acryloxypropyltrimethoxysilane, 3-acryloxypropyltriethoxysilane, 3 -A methacryloxy butyl trimethoxysilane etc. can be mentioned. Note that, for example, gravure printing can be performed before the drop printing of the granular printing material. In this case, if the aqueous base coating film 3 is dried, a transparent type aqueous base coating film may be additionally applied immediately before dropping the granular printing material.

  Conventionally known fluororesin emulsions and urethane dispersions that can be used as the film-forming resin can be used. The emulsion of a fluorine-containing resin can be prepared, for example, by copolymerizing a fluorine-containing olefin and another copolymerizable monomer. Commercially available products can be used as the fluorine-containing resin emulsion, and specific examples include Lumiflon FE4300, FE2310, FE4500, and FE4200 available from Asahi Glass Co., Ltd. The urethane dispersion is a dispersion in which a urethane resin is dispersed in an aqueous medium, and a commercially available product can be used in the same manner as the fluorine-containing resin. Specifically, NeoRez R- commercially available from Enomoto Kasei Co., Ltd. 9603, R967, R972, AX-311, etc., or Superflex 130 commercially available from Daiichi Kogyo Seiyaku.

  These film-forming resins have a pencil hardness at 10 ° C. of F or lower than F. The hardness is more preferably F to 6B. When the pencil hardness of the film-forming resin is H or more, the adhesiveness of the granular aqueous fixing agent film is insufficient, and the fixability of the crushed granular printing material becomes insufficient. On the other hand, when the pencil hardness of the coating film-forming resin is less than 6B, the coating strength of the resulting picture printing coating film may be insufficient. The pencil hardness at 10 ° C. of the coating film-forming resin contained in the particulate aqueous fixing agent is obtained by coating an emulsion or dispersion containing the coating film-forming resin on a glass plate heated to 100 ° C. and then 100 Measured by forming a dry film with a film thickness of 10 μm, which is a good film state obtained by drying at a high temperature of ℃, and then measuring the pencil hardness of the obtained film under cooling at 10 ° C. can do.

  Even when the pencil hardness of the film-forming resin is H or more, by adding a large amount of an organic solvent to the granular aqueous fixing agent, the adhesiveness of the granular aqueous fixing agent film is improved. The fixability of the granular printing material is improved. However, in this case, the hot water resistance of the resulting pattern print coating film is lowered, which is not preferable.

  The granular aqueous fixing agent of the present invention contains a viscosity control agent. Specific examples of the viscosity control agent that can be used include a fibrous derivative system such as hydroxyethyl cellulose, a polyacrylic acid system such as a modified polyacryl sulfonate, a polyether system such as a polyether urethane modified product, and an organic bentonite system. Etc. In the granular aqueous fixing agent of the present invention, the thixotropy index (TI value) is adjusted to a range of 1.5 to 10 by including the above-mentioned film-forming resin and a viscosity control agent. .

  The content of the viscosity control agent contained in the granular aqueous fixing agent used in the present invention varies depending on the capacity of the container used for the preparation of the granular aqueous fixing agent and the ability of the stirrer, but the resin of the film-forming resin. It is preferable to contain 0.05 to 10 parts by weight of resin solid content of the viscosity control agent with respect to 100 parts by weight of solid content, and 0.15 to 7 parts by weight of resin solid content of viscosity control agent. Is more preferable. By including the viscosity control agent in the above range, the thixotropy index (TI value) can be set in the above range.

  Here, the thixotropy index (TI value) is an index indicating thixotropy, and is a parameter indicating the property of becoming a sol when stirred at a constant temperature and returning to a gel when left untreated. Such a thixotropic state is often seen in dispersion systems, although it depends on the characteristics of the pigment particles and the vehicle. This is because the internal structure of the gel is destroyed by the external force and the fluidity is increased, but the bonds between the particles are reproduced when left standing. Generally, in a dispersion system such as a paste, the viscosity value decreases according to the rotation speed, but the thixotropy index is obtained by taking a ratio of viscosity values at different rotation speeds a and b (a> b). About this thixotropy index, it can measure by the method based on the reference test of JIS-K-5400.4.5.3, and the evaluation of the non-Newtonian property by a rotational viscometer.

  The thixotropic index of the granular aqueous fixing agent used in the present invention is 1.5 to 10, preferably 1.5 to 7. When the thixotropy index is less than 1.5, the granular printing material is not sufficiently adhered to the standing surface of the building material board having uneven projections (the surface that becomes the vertical part when the building material board is placed horizontally). This will cause a so-called “shoulder scale”. On the other hand, when the number exceeds 10, irregularities are generated in the coating base coating film, and the storage stability of the paint is deteriorated.

  The resin solid content of the granular aqueous fixing agent is preferably 10 to 50% by weight. When the resin solid content of the granular aqueous fixer is less than 10% by weight, the resulting resinous solid content of the granular aqueous fixer film is low, which is not preferable because the adhesiveness may be lowered. When the solid content of the resin exceeds 50% by weight, the viscosity of the granular aqueous fixing agent is remarkably increased, and the operation time during which the granular printing material can be effectively fixed after the granular aqueous fixing agent is coated, that is, the granular material. This is not preferable because the time during which the aqueous fixing agent is in a wet state may be shortened.

Granular printing pattern The granular printing pattern 5 is formed by dropping and printing a granular printing material in a pattern by a stencil printing system. That is, the pattern is formed by naturally dropping the granular printing material on the wet granular aqueous fixer film 4 formed by coating the granular aqueous fixer. Here, the wet state means a state in which the particulate aqueous fixing agent film is undried or uncured.

  FIG. 2 shows a schematic configuration diagram of a stencil printing system suitably used for forming the granular printing pattern 5. As shown in FIG. 2, this stencil printing system includes a transport device 12, a stencil printing apparatus that is installed on the transport device 12 and includes a cylindrical stencil 21 </ b> A and a doctor unit 22 that is joined to the inside of the stencil 21 </ b> A. 11, a fixing device 13 disposed downstream of the conveying device 12, a pair of first granular printing material recovery devices 33 for recovering the scattered granular printing material, a second granular printing material recovery device 34, and a first 1 and a granular printing material circulating means 35 for returning the granular printing material recovered by the second granular printing material recovery apparatus to the stencil printing apparatus 11.

  An enlarged sectional view of the stencil printing apparatus 11 in FIG. 2 is shown in FIG. As shown in FIG. 3, a building material board 31 on which a sealer layer, an aqueous base coating film and a granular aqueous fixing agent film as necessary are sequentially formed is transported by a transport device 12, and the stencil printing device 11 is transported during transport. The granular printing material 5 is dropped to form the granular printed pattern 5. The curing process by the fixing device 13 may be before or after the formation of the aqueous clear coating film 6.

  As the granular printing material, sand, dredged sand, color sand, beads, color chips, mineral chips, glass chips, wood chips (for example, scenery powder), pigments, color beads and the like can be used. As these granular printing materials, granular materials other than the granular materials that rise in the flow of air because the particle size or specific gravity is too small for use in the present invention are preferably used.

  The average particle diameter of the granular printing material is preferably an average particle diameter of 1/2 or less of the hole diameter of the plate hole 27 provided in the cylindrical stencil 21A. When the average particle diameter of the granular printing material exceeds 1/2 of the hole diameter of the plate hole 27, it is not preferable because the plate hole is easily clogged and the pattern becomes unstable. The average particle diameter of the granular printing material is preferably 40 to 1000 μm. In addition, the average particle diameter of the granular printing material in this specification is measured by measuring 100 particle diameters using a microscope and calculating the average value of the measured values.

The aqueous clear coating composition used for forming the aqueous clear coating film 6 includes at least one selected from the group consisting of an acrylic emulsion, an acrylic silicone emulsion, a fluororesin emulsion, and a urethane dispersion. An aqueous clear coating composition containing a film-forming resin is preferably used. As the acrylic emulsion, acrylic silicon emulsion, fluororesin emulsion, and urethane dispersion, the film-forming resin exemplified in the particulate aqueous fixing agent film 4 is preferably used.

  In the present invention, the aqueous clear coating composition for forming the aqueous clear coating film preferably contains the particulate aqueous fixing agent. As described above, in the water-based clear coating composition and the particulate water-based fixing agent, by using the same film-forming resin, performances inherent to the resin such as weather resistance are more effectively exhibited.

  The hardness of the film-forming resin contained in the aqueous clear coating composition is preferably H or less, more preferably H to 5B, in terms of pencil hardness at 10 ° C. When the pencil hardness of the film-forming resin contained in the water-based clear coating composition is in the above range, it is possible to obtain the advantages of good fixability of the granular printing material and improvement in physical strength of the resulting picture printing film. Can do. The method for measuring the pencil hardness of the film-forming resin contained in the aqueous clear coating composition at 10 ° C. is the same as the method for measuring the granular aqueous fixing agent.

  The aqueous clear coating film 6 preferably contains at least one selected from the group consisting of a bright material, a dye, a pigment, and a design additive. These can be blended within a range in which the aqueous clear coating film 6 can maintain transparency, and any conventionally known one can be used. For example, as the bright material, color mica, metal flakes of resin flakes or glass flakes, etc. can be used. In addition, commonly used paint pigments can be used as the pigment, but the added amount is preferably 3% by volume or less so that the pattern can be seen. As the design additive, resin beads, resin color beads, glass flakes, silica powder and the like can be used.

Method for Forming Pattern Printed Coating Film The pattern printed coating film of the present invention can be formed by a method including at least the following steps:
Applying a water-based base coating composition on the building material board 1 to form a water-based base coating film 3;
A step of coating a granular aqueous fixing agent on at least a part of the obtained aqueous base coating film 3 to form a granular aqueous fixing agent film 4;
On the obtained granular aqueous fixing agent film 4, the granular printing material 5 is dropped and printed in a pattern using a stencil printing system while the granular aqueous fixing agent film 4 is wet. And a step of applying an aqueous clear coating composition to form an aqueous clear coating film 6 covering the aqueous base coating film 3, the granular aqueous fixing agent film 4 and the granular printed pattern 5.
In such a method, the above-mentioned granular aqueous fixing agent is used as the granular aqueous fixing agent.

  In the formation of the water-based base coating film 3, the water-based base coating composition can be applied by a normal coating method, for example, air spray, airless spray, hot airless spray, hot spray or other spray coating, roll coater coating, brush Examples include paint coating, spatula coating, dip coating, flow coating, and curtain flow coater coating. Examples of the method for curing the aqueous base coating composition include a method of heating and drying at 70 to 120 ° C. for 2 to 15 minutes.

  Next, a granular aqueous fixing agent is applied on the obtained aqueous base coating film 3 to form a granular aqueous fixing agent film 4. The portion where the granular aqueous fixing agent is applied is the portion where the granular printed pattern 5 is to be fixed. For example, when the stucco-like pattern printed coating film 10 is formed on the building material board, the granular aqueous fixing agent film 4 can be formed by applying the granular aqueous fixing agent to the entire surface of the aqueous base coating film 3. For example, in the case of forming a brick wall-like pattern printed paint film 10 on a building material board, the aqueous part of the granular material is partially formed on the water-based base paint film 3 on the part (uneven projection part) that becomes the brick part. The fixing agent is applied, that is, the granular aqueous fixing agent is applied to a part of the aqueous base coating film 3 to form the granular aqueous fixing agent film 4.

  In the formation of the granular aqueous fixing agent film 4, the granular aqueous fixing agent can be applied, for example, by roll coater coating, spray coating, brush coating, spatula coating, or the like. For example, when the particulate aqueous fixing agent is applied to the entire surface of the aqueous base coating film 3, it can be easily applied by spray coating. Moreover, when forming a pattern printing coating film on the building material board (for example, brick wall tone) which has an uneven | corrugated shaped projection part, the part which becomes a brick part on the water-based base coating film 3 using a roll coater ( That is, the granular aqueous fixing agent can be easily applied partially (that is, the granular aqueous fixing agent is applied to a part of the aqueous base coating film 3) to the uneven projection portion.

In the formation of particulates in the aqueous fixing agent layer 4, the coating liquid application amount of the particulate matter in the aqueous fixing agent is preferably a 20~160g / ^{m 2,} and more preferably 30~140g / ^{m 2.} When the coating amount of the particulate aqueous fixing agent is in the above range, fixing of the granular printing material can be ensured. When the coating amount of the particulate aqueous fixing agent is less than 20 g / m ² , the fixing of the granular printing material may not be ensured. When the coating amount of the granular aqueous fixing agent exceeds 160 g / m ² , foaming may occur when the granular aqueous fixing agent is dried and cured, resulting in poor appearance of the coating film. .

  In the present specification, the “coating liquid coating amount of the particulate aqueous fixing agent” means the coating liquid amount immediately after the particulate aqueous fixing agent is applied. The coating amount of the particulate aqueous fixing agent is 0 to 50 ° C., and the humidity is 10 to 100%. The particulate aqueous fixing agent is applied to the object to be coated, and is applied within 0 to 1 minute. It can be determined by measuring the weight of the coating liquid.

  Next, the granular printing material is dropped and printed in a pattern shape while the formed granular aqueous fixing agent film 4 is wet. As a result, the granular printing material is fixed on the wet granular material aqueous fixing agent film 4. The stencil printing system suitably used for drop printing of the granular printing material is as described above.

  In addition, when applying the granular aqueous fixing agent to a part of the aqueous base coating film, after dropping the granular printing material into a pattern, the granular printing material dropped on the part not coated with the granular aqueous fixing agent. It may be removed by air blow.

  The above granular printing material can be used. And various designs can be designed in the pattern printed coating film obtained by selecting various granular printing materials used here. For example, a plaster-like pattern printed coating film can be formed by using sand or cinnabar sand having an average particle size of 40 to 200 μm as the granular printing material. Further, for example, by using sand or dredged sand having an average particle size of 70 to 500 μm as a granular printing material, it is possible to form a pattern printed coating film having a sandstone feel. In such a case, two or more kinds of hue sand or cinnabar sand may be used in combination as required.

  If necessary, before or after the step of fixing the granular printing pattern and before the step of forming the aqueous clear coating film, the granular printing material is further converted into a wet granular material aqueous fixing agent. It may be dropped on the membrane. In this case, the granular printing material is dropped at least twice. In this step of further dropping the granular printing material onto the wet granular aqueous fixing agent film, the granular printing material may be dropped using the perforated plate printing system described above, that is, in this case, perforated plate printing. The granular printing material can be dropped using the system twice or more.

  In this step of further dropping the granular printing material, an apparatus other than the hole plate printing system described above can be used. For example, the granular printing material can be dropped on the entire surface using an apparatus used by those skilled in the art such as a sieve or a granular material spraying apparatus. As a granular material spraying device which can be used here, for example, a rotating drum means having a plurality of circular hole portions having a diameter of 0.6 mm to 4.0 mm and a depth of 0.3 mm to 3 mm on its circumferential surface portion. And a granular material spraying device provided with a granular printing material supply means for supplying the granular printing material to the circular hole of the rotating drum means. This granular material spraying apparatus has an advantage that the granular printing material supplied to the circular hole can be dropped and sprayed uniformly and stably with the rotation of the rotary drum means. This granular material spraying apparatus is also suitable for spraying fine granular printing materials that pass through a 26-mesh sieve. In addition, the schematic of this granular material spreading | diffusion apparatus is shown in FIG.

  The granular printing material to be dropped may be the same as the granular printing material dropped in the above process, or a granular printing material having at least one of color, shape, and material may be used. Good. And by dropping the granular printing material at least twice in this way, the texture of the resulting building material board can be made more complex and more highly expressed, and the design of the building material board can be more complicated And can be improved. In this way, by dropping the granular printing material at least twice, various designs having a better texture can be designed in the picture printed coating film.

  The coating film on which the granular printed pattern 5 is fixed in this way may form the aqueous clear coating film 6 after the granular aqueous fixing agent film 4 is dried or cured in the fixing device 13, or the granular aqueous fixing agent. The aqueous clear coating film 6 may be formed while the film 4 is in a wet state. Examples of the conditions for drying or curing the granular aqueous fixing agent film 4 include a method of heating and drying at 70 to 120 ° C. for 2 to 15 minutes.

  In the formation of the aqueous clear coating film 6, the aqueous clear coating composition can be applied by, for example, spray coating or flow coater coating. The aqueous clear coating film 6 formed in this way is then heated and dried at 70 to 120 ° C. for 2 to 5 minutes to form a cured coating film, whereby a pattern printing coating film is obtained.

  In the formation of the picture print coating film of the present invention, the thixotropic index of the granular aqueous fixing agent is 1.5 to 10, and the hardness of the film forming resin contained in the granular aqueous fixing agent film is 10 ° C. With a pencil hardness of less than F or F, there is no generation of shoulder scars, that is, a pattern printed coating film in which the granular printing material is satisfactorily retained even on the standing surface of a building board with uneven projections. It will be possible to obtain. Here, when the thixotropic index of the granular aqueous fixing agent is 1.5 to 10, the dripping of the granular aqueous fixing agent painted on the standing surface of a building material board having an uneven projection structure is reduced. As a result, good fixability of the granular printing material is ensured by dropping printing the granular printing material in a wet state of the granular aqueous fixing agent film. And, the hardness of the film-forming resin contained in the granular aqueous fixer film is lower than F or F in pencil hardness at 10 ° C., so that the degree of burying of the granular printing material in the granular aqueous fixer film is restricted. Therefore, good fixability of the granular printing material is ensured. In addition, good adhesion of the granular printing material on the picture-printed coating film is ensured without being restricted by the critical pigment concentration of the granular aqueous fixing agent. In addition, the hardness of the film-forming resin contained in the granular aqueous fixing agent film is low, that is, the granular aqueous fixing agent film is soft, there is a possibility that the durability of the resulting pattern printing coating film may be inferior. is there. However, even when the hardness of the film-forming resin contained in the particulate aqueous fixing agent film is low, the hardness of the aqueous clear coating film to be formed thereafter is made excellent by having the hardness within an appropriate range. Can be obtained.

  The following examples further illustrate the present invention, but the present invention is not limited thereto. In the examples, “parts” and “%” are based on weight unless otherwise specified.

Production Example 1
44.5 parts of ion-exchanged water and 0.3 part of sodium alkyldiphenyl ether disulfonate were charged into Kolben. Next, a homogeneous solution in which 50 parts of ion-exchanged water, 0.7 parts of sodium alkyldiphenyl ether disulfonate, 20 parts of styrene, 27 parts of 2-ethylhexyl acrylate, 20 parts of n-butyl acrylate, 33 parts of methyl methacrylate and 2 parts of acrylic acid are mixed. After cooling with ice, the mixture was added to a product hopper as an emulsifier and emulsified with a high-pressure homogenizer [Microfluidizer M-110Y; manufactured by Mizuho Kogyo Co., Ltd.] with 4 kgf / cm ² of driving air while stirring with an agitator. This emulsion was put into a separable flask, and 13 parts of ion exchange water and 0.3 part of ammonium persulfate were added while stirring. After nitrogen substitution, the mixture was heated to 65 ° C. and polymerized for 4 hours. This obtained acrylic emulsion Em (1). Using the obtained Em (1), a glass plate heated to 100 ° C. was coated with a doctor blade, dried by heating in a 100 ° C. oven for 10 minutes, cooled to 10 ° C., and measured. The pencil hardness of the dry film having a thickness of 10 μm was 5B.

Production Examples 2-6
Other than the blending shown in Table 1, Em (2) to Em (6) were obtained in the same manner as in Production Example 1. The pencil hardness of the obtained Em was measured in the same manner as described above.

Aqualon HS-10: manufactured by Daiichi Kogyo Seiyaku Co., Ltd., emulsion polymerization agent KBM-503: Silane coupling agent (γ-methacryloxypropyltrimethoxysilane)
KR500: manufactured by Shin-Etsu Chemical Co., Ltd., silicon oligomer

Production Example 7
Production of Granular Aqueous Fixing Agent (1) 69 parts of Em (1) produced in Production Example 1 was weighed into a stainless Kolben and stirred with a desktop disper. While continuing stirring, 23.6 parts of tap water, 0.3 parts of 25% ammonia water, 6.1 parts of 50% buticello water (butyl cellosolve aqueous solution), 0.3 parts of Adecanate B940 (Adeka Antifoam), Tinubin 292 (ultraviolet absorber commercially available from Nagase Sangyo Co., Ltd.) 0.7 part and SN thickener 640 / water = 1/1 mixture 2 parts were sequentially added to obtain an aqueous particulate fixing agent (1).

Production Examples 8-18
Production of granular aqueous fixing agents (2) to (12) Granular aqueous fixing agents (2) to (12) were obtained in the same manner as in Production Example 7 except for the formulations shown in Tables 2 to 3. .

  The thixotropy indexes of the granular aqueous fixing agents (1) to (12) obtained in Production Examples 7 to 18 were measured as follows.

Measurement of thixotropy index According to JIS-K-5400, with a digital display type rotational viscometer (Brook Field, DV-1 + type B viscometer), a viscosity (A) at a rotation speed of 6 rpm at 25 ° C, The viscosity (B) at a rotational speed of 60 rpm was measured, and (A) / (B) was calculated to obtain a thixotropy index value.

In Tables 2 and 3 above,
Lumiflon FE4300: manufactured by Asahi Glass Co., Ltd., fluorine emulsion NeoRez R9603: manufactured by DSM, urethane dispersion adecanate B940: manufactured by ADEKA, defoamer tinuvin 292: manufactured by Ciba Specialty Chemicals, light stabilizer CS-12: 2, 2, -trimethyl-1,3-pentanediol monoisobutyrate solvent SN thickener 640: manufactured by San Nopco, a thickener.
The pencil hardness of the two types of resins, Lumiflon FE4300 and NeoRez R9603, was measured in the same manner as in Production Example 1.

Production Examples 19-24
Production of aqueous clear coating compositions (1) to (6) Aqueous clear coating compositions (1) to (6) were produced according to the formulation shown in Table 4.

Metashine MC515OPS: Nippon Sheet Glass Co., Ltd., luster pigment

Examples 1-18 and Comparative Examples 1-4
A 16 mm thick, embossed slate plate with a thickness of 16 mm is used as a base material, and a sealer layer, an aqueous base coating film and an aqueous particulate fixing agent film are formed on the base material in the following steps, a granular printing material is sprayed, and an aqueous clear coating film The pattern printing coating film was obtained.

Sealer layer formation: A base material heated to 40 ° C. was spray-coated with 30 g / m ² (solid content) of audite sealer (manufactured by Nippon Paint Co., Ltd., acrylic emulsion-based paint composition). Subsequently, it heat-dried at 80 degreeC for 3 minute (s).

Aqueous base coating film formation: On the obtained sealer layer, 35 g / m ² (solid content) of Odepower intermediate coating gray (manufactured by Nippon Paint Co., Ltd.) was spray coated. Subsequently, it heat-dried at 100 degreeC for 5 minute (s).

  Formation of granular aqueous fixing agent film: any one of granular aqueous fixing agents (1) to (12) shown in Tables 5 to 7 obtained in Production Examples 7 to 18 is 15 to 20 seconds / NK2 cup / room temperature. Diluted to spray coating.

Dispersion of granular printing material: Within 20 seconds after applying the granular aqueous fixing agent, a granular printing material (colored silica sand 67 cream) was sprayed at an application amount of 200 g / m ² .

Aqueous clear coating film formation: Any of the aqueous clear coating compositions (1) to (6) prepared according to Production Examples 19 to 24 was diluted to 15 to 20 seconds / NK2 cups / room temperature, and sprayed with a granular printing material. One minute later, 100 g / m ² (coating liquid application amount) was spray-coated. Then, it set for 3 minutes at room temperature, and then heat-dried in 100 degreeC oven for 10 minutes.

  The obtained pattern print coating film was evaluated by the following evaluation methods, and the results are shown in Tables 5-7.

The fixing property of the granular printing material was visually evaluated according to the following criteria.

Granular printing material fixability (1)
○: The granular aqueous fixing agent in the flat portion has good adhesiveness in a wet state, and the crushed granular printing material can be fixed.
X: Adhesiveness of the granular aqueous fixing agent in the flat portion is insufficient, and the fixability of the rolled granular printing material is insufficient.

Granular printing material fixability (2)
○: The granular water-based fixing agent on the embossed edge and the inclined surface has little sagging, and the crushed granular printing material can be fixed.
X: The dripping of the granular aqueous fixing agent on the embossed edge or the slope portion is remarkable, and the granular printing material on the edge or the slope portion becomes insufficiently fixed as a thin film.

Adhesiveness The adhesiveness test was done by the method (2 mm space | interval) based on JIS-K-5600.55.6 about the pattern printing coating film obtained by the said Example and comparative example. Evaluation was performed according to the following criteria.
○: No peeling is observed ×: There is peeling

Warm water resistance The pattern print coating films obtained in the above examples and comparative examples were immersed in warm water at 60 ° C. for 24 hours. After taking out from warm water, it dried at 20 degreeC for 24 hours, Then, it visually evaluated whether the change had arisen in the pattern printing coating film.
○: No change in appearance Δ: Slight whitening is observed ×: Clear whitening is confirmed

Accelerated weather resistance The pattern print coating films obtained in the above examples and comparative examples were subjected to an accelerated test (4-hour irradiation and 4-hour wetting cycle) for 800 hours using a die plastic metal weather manufactured by Dainippon Plastic Co., Ltd. The film appearance was evaluated.
◯: Less than color difference ΔE2 and no significant discoloration is confirmed Δ: Color difference ΔE2 or more and less than 4 and discoloration is confirmed, but no significant discomfort is observed in visual evaluation ×: Color difference ΔE4 or more Significant discoloration is confirmed

As shown in Tables 5 to 7, in Examples 1 to 16 using the granular aqueous fixing agent of the present invention, excellent fixability of the granular printing material, adhesion, hot water resistance and accelerated weather resistance. It was confirmed to be excellent. On the other hand, in Comparative Example 1 in which the thixotropy index of the granular aqueous fixing agent is less than 1.5, the granular printing material is not sufficiently fixed on the inclined surface or the like. Uneven texture was insufficient. Further, in Comparative Example 2 in which the hardness of the film-forming resin contained in the granular aqueous fixing agent film is H, which is higher than F, fixing of the granular printing material was insufficient. Even if the hardness of the film-forming resin is H, which is harder than F, the fixing property of the granular printing material is improved by blending a large amount of the organic solvent, but in this case, the hot water resistance is inferior. It was confirmed. In the formation of the granular aqueous fixing agent film, it was also confirmed that the granular printing material was insufficiently fixed in Comparative Example 4 in which the coating amount of the granular aqueous fixing agent was less than 20 g / m ² . .

Examples 19-21
Examples 19 to 21 below are examples of embodiments in which the granular printing material is dropped twice or more. In addition, the following AD was prepared beforehand as a granular printing material.

*：ポッターズバロティーニ社製、低アルカリ硼珪酸ガラス（粒径４２５〜６００ｍｍ）

*: Low alkali borosilicate glass (particle size: 425-600 mm), manufactured by Potters Barotini

Example 19
A slate plate (without joints) with a stone pattern embossment with a thickness of 16 mm is heated to 40 ° C. and sprayed with 30 g / m ² (solid content) of audite sealer (manufactured by Nippon Paint Co., Ltd., acrylic emulsion paint composition). Painted. Subsequently, it was heat-dried to form a sealer layer.
After raising the temperature of the slate plate to 55 ° C., spray coating of 35 g / m ² (solid content) of Odepower intermediate coat (manufactured by Nippon Paint Co., Ltd.) on the obtained sealer layer, followed by heat drying A base coating was formed.
After raising the temperature of the slate plate to 65 ° C., the granular aqueous fixing agent (1) prepared in Production Example 7 was diluted to 15 to 20 seconds / NK2 cups · room temperature, and 100 g / m ² (coating liquid coating amount). It was spray painted so that Immediately after spray coating, the granular printing material A was sprayed over the entire surface of the slate plate at a spraying amount of 200 g / m ² using the particulate material spraying device shown in FIG. Next, using the stencil printing system of FIG. 2, the granular printing material B was sprayed on the pattern portion of the slate plate (that is, a partial surface of the slate plate) at a spraying amount of 100 g / m ² . The spraying of these granular printing materials was performed within 20 seconds after the coating of the granular aqueous fixing agent (1).
Next, the aqueous clear coating composition (1) prepared according to Production Example 19 was diluted to 15 to 20 seconds / NK2 cups · room temperature, and 100 g / m ² (coating liquid application) 1 minute after the spraying of the granular printing material. The amount was spray-coated. Then, it set for 3 minutes at room temperature, and then heat-dried in 100 degreeC oven for 10 minutes. Thereby, the pattern printing coating film which has a stone pattern pattern was obtained.

Example 20
A slate plate (without joints) with a stone pattern embossment with a thickness of 16 mm is heated to 40 ° C. and sprayed with 30 g / m ² (solid content) of audite sealer (manufactured by Nippon Paint Co., Ltd., acrylic emulsion paint composition). Painted. Subsequently, it was heat-dried to form a sealer layer.
After raising the temperature of the slate plate to 55 ° C., spray coating of 35 g / m ² (solid content) of Odepower intermediate coat (manufactured by Nippon Paint Co., Ltd.) on the obtained sealer layer, followed by heat drying A base coating was formed.
After raising the temperature of the slate plate to 65 ° C., the granular aqueous fixing agent (1) prepared in Production Example 7 was diluted to 15 to 20 seconds / NK2 cups · room temperature, and 100 g / m ² (coating liquid coating amount). It was spray painted so that Immediately after spray coating, the granular printing material A was sprayed over the entire surface of the slate plate at a spraying amount of 200 g / m ² using the particulate material spraying device shown in FIG. Next, using the stencil printing system of FIG. 2, the granular printing material B is sprayed on the pattern portion of the slate plate (that is, a partial surface of the slate plate) at a spraying amount of 50 g / m ^2. The granular printing material C was sprayed on the pattern portion of the slate plate (that is, a partial surface of the slate plate) at a spraying amount of 50 g / m ² . The spraying of these granular printing materials was performed within 20 seconds after the coating of the granular aqueous fixing agent (1).
Next, the aqueous clear coating composition (1) prepared according to Production Example 19 was diluted to 15 to 20 seconds / NK2 cups · room temperature, and 100 g / m ² (coating liquid application) 1 minute after the spraying of the granular printing material. The amount was spray-coated. Then, it set for 3 minutes at room temperature, and then heat-dried in 100 degreeC oven for 10 minutes. Thereby, the pattern printing coating film which has a stone pattern pattern was obtained.

Example 21
A slate plate (with joints) with 16mm thick brick pattern embossing is heated to 40 ° C and sprayed with audite tight sealer (manufactured by Nippon Paint Co., Ltd., acrylic emulsion paint composition) 30g / m ² (solid content) Painted. Subsequently, it was heat-dried to form a sealer layer.
After raising the temperature of the slate plate to 55 ° C., 35 g / m ² (solid content) of Odepower Intermediate Coated Gray (manufactured by Nippon Paint Co., Ltd.) was spray-coated on the obtained sealer layer, and then dried by heating. Next, after raising the temperature of the slate plate to 65 ° C., an ode power overcoat beige color (manufactured by Nippon Paint Co., Ltd.) was applied by roll coating in an amount of 20 g / m ² (solid content), and then heated and dried. In this way, an aqueous base coating film was formed in which the top beige paint was applied to the convex portion of the slate plate.
After raising the temperature of the slate plate to 65 ° C., the granular aqueous fixing agent (1) prepared in Production Example 7 was applied by roll coating so as to be 40 g / m ² (coating liquid coating amount). Thus, the granular aqueous fixing agent (1) was applied to the convex portion of the slate plate. Subsequently, the granular printing material D was sprayed over the entire surface of the slate plate at a spraying amount of 200 g / m ² using the particulate material spraying device shown in FIG. Next, using the stencil printing system of FIG. 2, the granular printing material B was sprayed on the pattern portion of the slate plate (that is, a partial surface of the slate plate) at a spraying amount of 20 g / m ² . The spraying of these granular printing materials was performed within 20 seconds after the coating of the granular aqueous fixing agent (1). Thereafter, excess granular printing material was removed by air blow.
Next, the aqueous clear coating composition (1) prepared according to Production Example 19 was diluted to 15 to 20 seconds / NK2 cups · room temperature, and 100 g / m ² (coating liquid application) 1 minute after the spraying of the granular printing material. The amount was spray-coated. Then, it set for 3 minutes at room temperature, and then heat-dried in 100 degreeC oven for 10 minutes. Thereby, the pattern printing coating film which has a brick pattern was obtained.

  It has been confirmed that the present invention can provide a pattern printing coating film and an aqueous particulate fixing agent that can provide clear and uniform image quality and can also express tactile sensation due to unevenness that could not be expressed by conventional printing methods. It was done. In addition to being excellent in such an uneven feel, the pattern printed coating film of the present invention is also excellent in warm water resistance and accelerated weather resistance, and thus is very suitable as a pattern printed coating film for building material boards. .

It is sectional drawing of the pattern printing coating film of this invention. It is a schematic block diagram of a stencil printing apparatus. FIG. 3 is an enlarged cross-sectional view of the vicinity of the stencil printing apparatus of FIG. 2. It is a schematic block diagram of the granular material spreading | diffusion apparatus which can drop a granular printing material to the whole surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building material board 2 Sealer layer 3 Aqueous base coating film 4 Granule aqueous fixer film 5 Granular printing material 6 Aqueous clear coating film 10 Pattern printing coating film 11 Stencil printing device 12 Conveying device 13 Fixing device 21A Stencil plate 22 Doctor unit 23 Granular printing Material leveling device 24 Plate cover 25 Hole or clogging air nozzle 26 Granular printing material 27 Plate hole 28 Doctor 31 Building material board 32 Conveyor 33 First granular printing material recovery device 34 Second granular printing material recovery device 35 Granular printing Material circulation means 36 Heater 37 Adhering device conveyor

Claims (10)

It is a pattern printing coating film formed on a building material board,
The pattern printing coating film is
An aqueous base coating film covering the surface of the building material board;
A granular aqueous fixing agent film formed on at least a part of the aqueous base coating film,
A granular printing pattern fixed by the granular aqueous fixing agent film, and an aqueous clear coating film covering the aqueous base coating film, the granular aqueous fixing agent film and the granular printing pattern,
A multi-layer coating composed of
The granular printing pattern is a pattern formed by dropping and printing a granular printing material into a pattern by a stencil printing system,
The granular aqueous fixing agent film is a coating film obtained by coating a granular aqueous fixing agent at a coating liquid coating amount of 20 to 160 g / m ² , and the granular aqueous fixing agent includes an acrylic emulsion and an acrylic silicon emulsion. A film-forming aqueous resin selected from the group consisting of a fluorine resin emulsion and a urethane dispersion; and a viscosity modifier;
The thixotropic index of the granular aqueous fixing agent is 1.5 to 10,
The hardness of the film-forming resin contained in the granular aqueous fixing agent film is F or F lower than the F in pencil hardness at 10 ° C.
Pattern printing paint film.   2. The pattern according to claim 1, wherein the granular printing material is at least one selected from the group consisting of sand, dredged sand, color sand, beads, color chips, mineral chips, glass chips, wood chips, pigments, and color beads. Printed coating.   The pattern printing coating film according to claim 1, wherein a sealer layer is further provided between the building material board and the aqueous base coating film. A method of forming a pattern printing coating film formed on a building material board, comprising the following steps:
Coating a water-based base coating composition on a building material board to form a water-based base coating,
A step of applying a granular aqueous fixing agent on the entire surface of the obtained aqueous base coating film at a coating liquid coating amount of 20 to 160 g / m ² to form a granular aqueous fixing agent film;
On the obtained granular aqueous fixing agent film, the granular aqueous fixing agent film is wet and the granular printing material is dropped into a pattern using a stencil printing system to fix the granular printing pattern, And applying an aqueous clear coating composition to form an aqueous clear coating for coating the aqueous base coating, the particulate aqueous fixer film and the granular printed pattern:
Including at least
The particulate aqueous fixing agent is a fixing agent comprising at least a film-forming aqueous resin selected from the group consisting of an acrylic emulsion, an acrylic silicon emulsion, a fluororesin emulsion, and a urethane dispersion; and a viscosity modifier.
The thixotropic index of the granular aqueous fixing agent is 1.5 to 10,
The hardness of the film-forming resin contained in the granular aqueous fixing agent film is F or F lower than the F in pencil hardness at 10 ° C.
A method for forming a picture-printed coating film. A method of forming a pattern printing coating film formed on a building material board, comprising the following steps:
Coating a water-based base coating composition on a building material board to form a water-based base coating,
A step of applying a granular aqueous fixing agent to a part of the obtained aqueous base coating film at a coating liquid coating amount of 20 to 160 g / m ² to form a granular aqueous fixing agent film;
On the obtained granular aqueous fixing agent film, the granular aqueous fixing agent film is wet and the granular printing material is dropped into a pattern using a stencil printing system to fix the granular printing pattern, And applying an aqueous clear coating composition to form an aqueous clear coating for coating the aqueous base coating, the particulate aqueous fixer film and the granular printed pattern:
Including at least
The particulate aqueous fixing agent is a fixing agent comprising at least a film-forming aqueous resin selected from the group consisting of an acrylic emulsion, an acrylic silicon emulsion, a fluororesin emulsion, and a urethane dispersion; and a viscosity modifier.
The thixotropic index of the granular aqueous fixing agent is 1.5 to 10,
The hardness of the film-forming resin contained in the granular aqueous fixing agent film is F or F lower than the F in pencil hardness at 10 ° C.
A method for forming a picture-printed coating film.   Before or after the step of fixing the granular printing pattern and before the step of forming the aqueous clear coating film, a step of dropping the granular printing material onto the wet granular aqueous fixing agent film; A method for forming a picture-printed coating film according to claim 4 or 5.   The water-based clear coating composition for forming the water-based clear coating film is a method for forming a pattern print coating film according to any one of claims 4 to 6, wherein the particulate aqueous fixing agent is included.   In the step of fixing the granular printing pattern, the granular printing material is dropped and printed in a pattern on the wet granular aqueous fixing agent film using a stencil printing system, and then the excess granular printing material is air blown. The method for forming a picture-printed coating film according to any one of claims 4 to 7, which is a step of fixing the granular printed picture by removing with. A granular aqueous fixing agent for a pattern printing coating film used for fixing a granular printing material,
The granular aqueous fixing agent includes at least a film-forming aqueous resin selected from the group consisting of an acrylic emulsion, an acrylic silicone emulsion, a fluororesin emulsion, and a urethane dispersion; and a viscosity modifier.
The thixotropic index of the granular aqueous fixing agent is 1.5 to 10,
The hardness of the film-forming resin contained in the granular aqueous fixing agent is F or F lower than the pencil hardness at 10 ° C.,
A granular aqueous fixing agent.   In the formation method of the pattern printing coating film in any one of Claims 4-8, as said granular printing material, sand, dredged sand, a color sand, a bead, a color chip, a mineral chip, a glass chip, a wood chip, a pigment, and A design design method for a pattern printed coating film formed on a building material board, wherein a material selected from the group consisting of colored beads is used.

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