JP5070177B2 - Coating method - Google Patents

Description

  The present invention relates to a novel coating film forming method.

  Conventionally, various natural stone-like coating materials capable of expressing a design feeling similar to natural stones such as granite tone, marble tone, natural sandstone tone, etc. have been applied to the surface of buildings, civil engineering structures and the like.

  The surface of the paint film obtained with such a natural stone-like coating material expresses a unique design feeling by making use of the uneven surface shape. For example, the type of natural stone-like coating material, trowel, spatula, spray gun, etc. Depending on the method, natural stone-like patterns having various uneven shapes can be applied.

In addition, natural stone-like coating materials are blended with natural stone-like coating materials by adding thickeners, fibers, etc., and adjusting the viscosity of natural stone-like coating materials, so that the surface irregularity shape is not destroyed after painting. A shape can be formed.
Specifically, in Patent Document 1, by blending a bentonite-based thickener, it is excellent in dredging workability, can clearly form the staircase that is characteristic of sandstone, and has the same surface finish as sandstone. An artificial sandstone material is described.

JP-A-6-305802

However, the artificial sandstone material as disclosed in Patent Document 1 is excellent in dredging workability and can form a surface irregularity pattern clearly, but has a problem that dirt easily adheres to a surface irregularity portion (particularly a concave portion).
On the other hand, if the thickener or fiber is removed, the coating workability may be inferior, or the target surface irregular shape may not be formed. Was difficult.

  As a result of intensive studies to solve these problems, the present inventor has come up with a decorative coating material containing a synthetic resin emulsion, a specific water-dispersible silica, a fluorine-containing compound, an aggregate, and a fiber as essential components. Thus, the present invention has been completed.

That is, the present invention relates to the following coating film forming method.
1. A coating film forming method for forming a concavo-convex pattern by applying a decorative coating material to a substrate,
As the decorative coating material,
Synthetic resin emulsion (A), water-dispersible silica (B) having a particle size of 1 to 200 nm, fluorine-containing compound (C) having a polyfluoroalkyl group and a nonionic or amphoteric hydrophilic group, particle size of 0.05 to 5. An essential component is 0 mm aggregate (D) and fiber (E) having a fiber length of 0.1 to 10 mm,
The water-dispersible silica (B) is 0.1 to 100 parts by weight and the fluorine-containing compound (C) is 0.01 to 10 parts by weight based on 100 parts by weight of the solid content of the synthetic resin emulsion (A). A coating film forming method comprising using a decorative coating material containing 100 parts by weight of the aggregate (D) and 0.01 to 10 parts by weight of the fiber (E).

  The coating film forming method of the present invention can stably form an uneven shape without collapsing the uneven shape after coating, and has excellent antifouling properties for a long period of time. Moreover, the coating film formation method of this invention also has the outstanding workability | operativity in the coating film formation.

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

  The coating film forming method of the present invention is a coating film forming method in which a decorative coating material is applied to a substrate to form a concavo-convex pattern, and as the decorative coating material, a synthetic resin emulsion (hereinafter referred to as “( A) component ”, water-dispersible silica having a particle diameter of 1 to 200 nm (hereinafter also referred to as“ component (B) ”), a fluorine-containing compound having a polyfluoroalkyl group and a nonionic or amphoteric hydrophilic group (hereinafter“ (Also referred to as “component (C)”), an aggregate having a particle diameter of 0.05 to 5.0 mm (hereinafter also referred to as “(D) component”), and a fiber having a fiber length of 0.1 to 10 mm (hereinafter referred to as “(E) component”). ")" As an essential component.

Of these, the component (A) acts as a binder and can be obtained by copolymerizing various polymerizable monomers. Examples of the polymerizable monomer component constituting the component (A) include methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, n- Amyl (meth) acrylate, isoamyl (meth) acrylate, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, octyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate, octadecyl (meth) (Meth) acrylic esters such as acrylate, cyclohexyl (meth) acrylate, phenyl (meth) acrylate, benzyl (meth) acrylate;
Carboxyl group-containing monomers such as acrylic acid, methacrylic acid, crotonic acid, maleic acid or its monoalkyl ester, itaconic acid or its monoalkyl ester, fumaric acid or its monoalkyl ester;
Contains amino groups such as N-methylaminoethyl (meth) acrylate, dimethylaminoethyl (meth) acrylate, dimethylaminoethyl vinyl ether, N- (2-dimethylaminoethyl) acrylamide, N- (2-dimethylaminoethyl) methacrylamide monomer;
Pyridine monomers such as vinylpyridine;
Hydroxyl group-containing monomers such as 2-hydroxyethyl (meth) acrylate and hydroxypropyl (meth) acrylate;
Vinyl ester monomers such as vinyl acetate and vinyl propionate;
Nitrile group-containing monomers such as acrylonitrile and methacrylonitrile;
Aromatic monomers such as styrene, 2-methylstyrene, vinyltoluene, t-butylstyrene, chlorostyrene, vinylanisole, vinylnaphthalene, divinylbenzene;
Amide group-containing monomers such as acrylamide, methacrylamide, maleic acid amide, N-methylol (meth) acrylamide and diacetone acrylamide;
Epoxy group-containing monomers such as glycidyl (meth) acrylate, diglycidyl (meth) acrylate, and allyl glycidyl ether;
Carbonyl group-containing monomers such as acrolein, diacetone (meth) acrylamide, vinyl methyl ketone, vinyl ethyl ketone, vinyl butyl ketone;
Alkoxysilyl groups such as vinyltrimethoxysilane, vinyltriethoxysilane, γ- (meth) acryloyloxypropyltrimethoxysilane, γ- (meth) acryloyloxypropyltriethoxysilane, γ- (meth) acryloyloxypropylmethyldimethoxysilane Containing monomers;
Vinylidene halide monomers such as vinylidene chloride and vinylidene fluoride;
Other examples include ethylene, propylene, isoprene, butadiene, vinyl pyrrolidone, vinyl chloride, vinyl ether, vinyl ketone, vinyl amide, and chloroprene. These can be used alone or in combination of two or more. Among these, when an alkoxysilyl group-containing monomer is included as the polymerizable monomer, the physical properties of the coating film can be improved by interaction with the component (B).

Although the minimum film-forming temperature of (A) component can be set suitably, it is 80 degrees C or less normally, Preferably it is about 0-50 degreeC. When the minimum film-forming temperature of the component (A) is within such a range, it is possible to exhibit the stain resistance while ensuring the coating film properties such as crack resistance.
Moreover, although the glass transition temperature of (A) component can be set suitably, it is 100 degrees C or less normally, Preferably it is about -20-70 degreeC. If the glass transition temperature of the component (A) is within such a range, even when a pattern having a large film thickness is formed, it is possible to stably form an uneven shape, and a long-term coating film such as a crack over time. It is possible to exhibit antifouling resistance while ensuring physical properties.

Moreover, in this invention, (A) component containing 2 or more types of resin from which a glass transition temperature differs can also be used. A resin component with a low glass transition temperature works to improve adhesion to the base material and followability to an elastic base, and a resin component with a high glass transition temperature prevents coating strength and contamination. Therefore, by using resin components having different glass transition temperatures, it is possible to achieve both of the above performances.
In the present invention, a blend type using two or more types of synthetic resin emulsions having different glass transition temperatures may be used, or a core-shell type synthetic resin emulsion type comprising two or more types of synthetic resins having different glass transition temperatures may be used. These composite types may be used.
Particularly in the present invention, a synthetic resin emulsion (hereinafter referred to as “(a-1) component”) having a glass transition temperature of 0 ° C. or higher and 100 ° C. or lower (preferably 5 ° C. or higher and 90 ° C. or lower, more preferably 10 ° C. or higher and 80 ° C. or lower). And a synthetic resin emulsion (hereinafter referred to as “component (a-2)”) whose glass transition temperature is 5 ° C. or higher (preferably 10 ° C. or higher, more preferably 20 ° C. or higher). It is also preferable to use “. More specifically, the glass transition temperature of component (a-1) is 15 ° C. or higher and 100 ° C. or lower (preferably 20 ° C. or higher and 80 ° C. or lower), and the glass transition temperature of component (a-2) is −50 ° C. or higher and 15 ° C. or higher. It is preferably less than ℃ (preferably -40 ° C or more and 10 ° C or less).
Moreover, the mixing ratio of the (a-1) component and the (a-2) component is not particularly limited, but the (a-1) component: (a-2) component is 10:90 to 90: in terms of the solid content weight ratio. 10 (further, 20:80 to 80:20) is preferable. In addition to the component (a-1) and the component (a-2), other binders may be included as the component (A).
In addition, the glass transition temperature of this invention is a value calculated from the formula of Fox (FOX).

  Although the manufacturing method of (A) component is not specifically limited, For example, emulsion polymerization, soap free emulsion polymerization, dispersion polymerization, feed emulsion polymerization, feed dispersion polymerization, seed emulsion polymerization, seed dispersion polymerization, etc. are employable. (A) The average particle diameter of a component is about 0.05-0.3 micrometer normally.

  In the present invention, a crosslinking reaction type synthetic resin emulsion, a core-shell type synthetic resin emulsion, and the like can also be used as the component (A). Two or more synthetic resin emulsions can be used in combination. Among these, as the crosslinking reaction in the crosslinking reaction type synthetic resin emulsion, for example, carboxyl group and metal ion, carboxyl group and carbodiimide group, carboxyl group and epoxy group, carboxyl group and aziridine group, carboxyl group and oxazoline group, hydroxyl group and isocyanate group , A combination of carbonyl group and hydrazide group, epoxy group and hydrazide group, epoxy group and amino group, hydrolyzable silyl groups, and the like. Among these, preferred crosslinking reactions include a carboxyl group and an epoxy group, a carboxyl group and an oxazoline group, a carbonyl group and a hydrazide group, an epoxy group and a hydrazide group, and hydrolyzable silyl groups.

  The component (B) in the present invention is water-dispersible silica having a particle size of 1 to 200 nm. The particles constituting the component (B) are compounds having a high hardness because of silica as a main component, and having silanol groups on the particle surfaces. Such a component (B) greatly contributes to the effect of improving the stain resistance.

  The particle size of the component (B) is usually 1 to 200 nm, preferably 5 to 100 nm, more preferably 10 to 50 nm, and still more preferably 20 to 40 nm as the primary particle size. If the particle size is too large, the appearance of the formed coating film may be adversely affected. When the particle size is too small, there is a possibility that a sufficient effect cannot be obtained in the stain resistance. (B) The average primary particle diameter of a component is 5-100 nm, More preferably, it is 10-50 nm, More preferably, it is 20-40 nm. In the present invention, two or more kinds of water-dispersible silica having different average primary particle sizes can be used. The particle diameter of the component (B) is a value measured by a light scattering method.

  The pH of the component (B) is usually 5 or more and 12 or less, preferably 6 or more and 10 or less, more preferably 6 or more and 9 or less. The component (B) adjusted to such a pH can exhibit hydrophilicity due to abundant silanol groups on the particle surface, and greatly contributes to an improvement in stain resistance.

  Such a component (B) can be produced using, for example, sodium silicate or a silicate compound as a raw material. Among these, as silicate compounds, for example, tetramethoxysilane, tetraethoxysilane, tetra n-propoxysilane, tetraisopropoxysilane, tetra n-butoxysilane, tetraisobutoxysilane, tetrasec-butoxysilane, tetra-t-butoxy Examples thereof include silane, tetraphenoxysilane, and their condensates. In addition, alkoxysilane compounds other than the above silicate compounds, alcohols, glycols, glycol ethers, fluorine alcohols, silane coupling agents, polyoxyalkylene group-containing compounds, and the like can also be used. A catalyst etc. can also be used at the time of manufacture. Further, after the production process or after production, the metal contained in the catalyst or the like can be removed by ion exchange treatment or the like.

As the component (B), those having an electric conductivity of 3 mS / cm or less (preferably 2 mS / cm or less, more preferably 1 mS / cm or less) are suitable. In addition, the electrical conductivity said here is a value measured using "Model SC82 personal SC meter SC8221-J" (made by Yokogawa Electric Corporation) (measurement temperature 25 degreeC).
By using such a component (B), the water resistance and stain resistance of the formed coating film can be further enhanced.

  As the medium for the component (B), water and / or a water-soluble solvent can be used. Examples of the water-soluble solvent include alcohols, glycols, glycol ethers and the like. In the present invention, it is particularly desirable that the medium is composed only of water. By using such component (B), the decorative coating material can be made to have a low volatile organic solvent (low VOC). Moreover, the aggregate generation | occurrence | production at the time of mixing with (A) component can also be suppressed.

  The solid content of the component (B) is usually 5 to 50% by weight, preferably 10 to 40% by weight, and more preferably 15 to 30% by weight. If the solid content of the component (B) is within such a range, the stability of the component (B) itself, and the stability when the component (A) and the component (B) are mixed can be ensured. . If the solid content is too large, the component (B) itself may become unstable, or the decorative coating material may become unstable when mixed with the component (A). If the solid content is too small, a large amount of component (B) must be mixed in order to obtain a sufficient anti-staining effect, which is not practical.

  The mixing ratio of the component (B) is usually 0.1 to 100 parts by weight, preferably 0.3 to 80 parts by weight, and more preferably 0.8 to 100 parts by weight of the solid content of the component (A). 5 to 50 parts by weight, more preferably 1.0 to 30 parts by weight. With such a mixing ratio, the effects of the present invention can be sufficiently exerted. When the amount of the component (B) is too small, sufficient contamination resistance cannot be obtained. (B) When there are too many components, it becomes easy to produce a crack in a coating film.

  The component (C) in the present invention is a fluorine-containing compound having a polyfluoroalkyl group and a nonionic or amphoteric hydrophilic group. In the present invention, excellent contamination resistance can be exhibited by using the component (C) and the component (B) together. Furthermore, the drying property of the coating film can be improved, and it is effective for suppressing adhesion of contaminants in the initial stage of film formation. Although the specific mechanism of action in which such an effect is exhibited is not clear, the component (B) and the component (C) are orientated on the surface of the coating film during the formation of the coating film, and the hardness of the coating film surface is due to the synergistic action of both. It is speculated that hydrophilicity and the like are effectively increased.

  Such a polyfluoroalkyl group of component (C) is a group in which all or part of the hydrogen atoms bonded to carbon atoms in the alkyl group having a linear, branched or cyclic skeleton are substituted with fluorine atoms. is there. This polyfluoroalkyl group may have an etheric oxygen atom, a thioetheric sulfur atom or the like between carbon atoms in the polyfluoroalkyl group. The polyfluoroalkyl group may contain a halogen atom other than the fluorine atom. The number of carbon atoms in the polyfluoroalkyl group is usually 1 or more, preferably 3 or more, more preferably 6 or more. The upper limit of the number of carbon atoms in the polyfluoroalkyl group is usually 40 or less, preferably 20 or less. As the polyfluoroalkyl group of component (C), a perfluoroalkyl group is particularly suitable.

Examples of nonionic hydrophilic groups include polyalkylene oxide groups and amine oxide groups. Among these, as a polyalkylene oxide group, a polyethylene oxide group, a polypropylene oxide group, etc. are mentioned, for example, What mixed ethylene oxide group and a propylene oxide group can also be used. The repeating number of alkylene oxide is usually 2-100.
Examples of amphoteric hydrophilic groups include nitrogen-containing amphoteric hydrophilic groups such as quaternary ammonium halogen salts and betaines. Among these, examples of the halogen in the quaternary ammonium halogen salt include a chlorine atom, a bromine atom, and an iodine atom. Betaine has a quaternary ammonium and an anion of an acid, and examples of the acid include carboxylic acid. As the hydrophilic group in component (C), a nitrogen-containing amphoteric hydrophilic group having a betaine structure is particularly suitable.

As (C) component in this invention, what has the said functional group together can be used. Such a component (C) is prepared by synthesizing a polyfluoroalkyl group-containing compound as an intermediate by, for example, an electrolytic fluorination method, a telomerization method, an oligomerization method, etc., and then adding a hydrophilic group to the intermediate. It can manufacture by introducing.
As the component (C), a 0.01% aqueous solution having a surface tension at 25 ° C. of 20 mN / m or less (more preferably 18 mN / m or less) is suitable.

(C) component is 0.01-10 weight part (preferably 0.05-5 weight part, more preferably 0.1-3 weight part) in conversion of an active ingredient with respect to 100 weight part of solid content of (A) component. Part)). With such a ratio, it is possible to obtain a sufficient anti-contamination effect. When the mixing ratio of the component (C) is too small, it is difficult to obtain sufficient physical properties in terms of stain resistance. On the other hand, when the amount is too large, the appearance and water resistance of the coating film may be hindered.
The mixing ratio of the component (B) and the component (C) is 100: 0.01 to 100: 100 (preferably 100: 0.05 to 100: 30, more preferably 100: 0.1 to 100) by weight ratio. : 10) is preferable. When there are too few (C) components with respect to (B) component, it will become difficult to obtain sufficient physical property in terms of stain resistance. Moreover, when there are too many (C) components with respect to (B) component, there exists a possibility of causing trouble in the external appearance, water resistance, etc. of a coating film.

  (D) component in this invention is an aggregate with a particle diameter of 0.05-5.0 mm. Such component (D) can impart aesthetics to the coating surface. In the present invention, by adjusting the type and mixing ratio of the component (D), a desired color, uneven pattern, or the like can be provided.

  As the component (D), at least one selected from natural aggregates such as natural stones, natural aggregates of natural stones, and artificial aggregates such as colored aggregates can be suitably used. Specifically, for example, marble, granite, serpentinite, granite, fluorite, cryolite, feldspar, limestone, quartzite, quartz sand, crushed stone, mica, siliceous shale, and pulverized products thereof, ceramic pulverized product, ceramic pulverized product Products, crushed glass, glass beads, crushed resin, resin beads, rubber particles, metal particles, and the like. In addition, pulverized products such as shells, shells, wood, charcoal, activated carbon and the like can be used. Furthermore, those whose surfaces are colored and coated by performing surface treatment with pigments, dyes, glazes, and the like can also be used. The particle diameter of such component (D) is 0.05 to 5.0 mm.

  (D) A component should just be 10-4000 weight part with respect to 100 weight part of solid content of (A) component, Preferably it is 50-3000 weight part.

The component (E) in the present invention is a fiber having a fiber length of 0.1 to 10 mm. With such a component (E), the coating workability of the decorative coating material can be improved, and the uneven shape can be stably formed without collapsing the uneven shape after coating. In the present invention, particularly by combining the component (B), the component (C) and the component (E), it is possible to achieve both the antifouling property and the formation of a stable uneven shape.
When the fiber length of the component (E) is shorter than 0.1 mm, the improvement of the coating workability is not observed, and when the fiber length is longer than 10 mm, the dispersibility may be inferior, and it becomes difficult to form a stable uneven shape. It is difficult to obtain a desired pattern.

  Such (E) component is, for example, pulp fiber, polyester fiber, polypropylene fiber, aramid fiber, vinylon fiber, polyethylene fiber, polyarylate fiber, PBO fiber (polyparaphenylene benzobisoxazole fiber), viscose rayon fiber, Synthetic fiber such as nylon fiber, acrylic fiber, vinyl chloride fiber, cellulose fiber, natural fiber such as kenaf, palm, cork, bamboo, hemp, wisteria, pineapple, banana, straw, rock wool, glass fiber, silica fiber, silica Examples thereof include inorganic fibers such as alumina fibers, carbon fibers, and silicon carbide fibers. In the present invention, polyester fibers, vinylon fibers, hemp, straw, glass fibers and the like are particularly preferable.

  (E) A component is 0.01-10 weight part normally with respect to 100 weight part of solid content of (A) component, Preferably what is necessary is just to be 0.05-5 weight part. At this time, when the component (E) is less than 0.01 part by weight, the coating workability is lowered, and it becomes difficult to form a stable uneven shape. When the amount is more than 10 parts by weight, the coating workability is lowered and a stable uneven shape cannot be obtained.

  In addition to the above components, the decorative coating material of the present invention includes pigments, film-forming aids, plasticizers, antifreezing agents, antiseptics, antifungal agents, antibacterial agents, antifoaming agents, pigment dispersants, thickeners. , Leveling agents, wetting agents, pH adjusters, matting agents, UV absorbers, antioxidants, light stabilizers, adsorbents, catalysts, crosslinking agents, alkylene oxide chain-containing compounds, etc. By using the components in appropriate combinations, various forms of decorative coating materials can be designed.

Examples of pigments include titanium oxide, zinc oxide, carbon black, lamp black, bone black, graphite, black iron oxide, copper chrome black, cobalt black, copper manganese iron black, brown, molybdate orange, permanent red, and permanent carmine. , Anthraquinone red, perylene red, quinacridone red, yellow iron oxide, titanium yellow, first yellow, benzimidazolone yellow, chrome green, cobalt green, phthalocyanine green, ultramarine, bitumen, cobalt blue, phthalocyanine blue, quinacridone violet, dioxazine violet , Heavy calcium carbonate, precipitated calcium carbonate, light calcium carbonate, kaolin, talc, clay, porcelain clay, china clay, barium sulfate, precipitated Sex barium sulfate, barium carbonate, magnesium carbonate, silica flour, barytes, diatomaceous earth, hydrated fine silica, silica powder, aluminum hydroxide, aluminum pigments, pearl pigments and the like.
By using such a pigment in combination with the component (D), a wall surface decorative structure having excellent aesthetics can be obtained.

  The mixing ratio of the pigment may be appropriately set so as to obtain a desired coating pattern. However, the total amount of the component (D) and the pigment is usually 10 to 5000 with respect to 100 parts by weight of the solid content of the component (A). What is necessary is just to set it as about a weight part (preferably 50-4000 weight part).

Examples of film-forming aids include cellosolve, methyl cellosolve, ethyl cellosolve, butyl cellosolve, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol diethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, Triethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monobutyl ether, propylene glycol monoisobutyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monobutyl ether, dipropylene glycol isobutyl ether, tripro Glycol methyl ether, tripropylene glycol monoethyl ether, tripropylene glycol monobutyl ether, ethers such as tripropylene glycol isobutyl ether compound,
Ethyl cellosolve acetate, butyl cellosolve acetate, ethylene glycol monoethyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, propylene glycol methyl ether acetate, dipropylene glycol monoethyl ether acetate, dipropylene glycol monobutyl ether acetate, tripropylene glycol mono Ethyl ether acetate, tripropylene glycol monobutyl ether acetate, tripropylene glycol monoisobutyl ether acetate, 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, 2,2,4-trimethyl-1,3- Esters such as pentanediol diisobutyrate Etc. The.
By appropriately combining such a film-forming aid and the component (E), the coating workability of the decorative coating material is further improved, and the uneven shape is stably formed without collapsing the uneven shape after coating. be able to.

The mixing ratio of the film-forming auxiliary is 0.01 to 30 parts by weight (preferably 0.05 to 25 parts by weight) with respect to 100 parts by weight of the solid content of the component (A). More preferably, it is 0.1 to 20 parts by weight.
If the film-forming aid is too small, the film-forming property may be inferior. Moreover, when there are too many film forming adjuvants, there exists a possibility that the stability of a coating material etc. may be impaired.

Examples of the alkylene oxide chain-containing compound include polyalkylene glycols such as polyethylene glycol, polypropylene glycol, polybutylene glycol, polyethylene-polypropylene glycol, polyethylene-polybutylene glycol, polyethylene-polypropylene-polybutylene glycol, and methoxy. Polyethylene glycol, methoxy polypropylene glycol, ethoxy polyethylene glycol, ethoxy polypropylene glycol, propoxy polyethylene glycol, propoxy polypropylene glycol, butoxy polyethylene glycol, butoxy polypropylene glycol, hexyl alkoxy polyethylene glycol, cyclohexyl alkoxy polyethylene glycol, 2-ethylhexyl al Alkoxypolyalkylene glycols such as xypolyethylene glycol, cetylalkoxypolyethylene glycol, stearylalkoxypolyethyleneglycol, methylphenoxypolyethyleneglycol, nonylphenoxypolyethyleneglycol, decylphenoxypolyethyleneglycol, naphthoxypolyethyleneglycol, etc., and amino groups of these compounds, Examples include functional group-modified products such as epoxy groups and alkoxysilyl groups.
By including such an alkylene oxide chain-containing compound, a coating film having excellent storage stability can be obtained.
The weight average molecular weight of the alkylene oxide chain-containing compound is not particularly limited, but is preferably 200 or more and 5000 or less, more preferably 300 or more and 3000 or less, and further preferably 500 or more and 2000 or less. If it is smaller than 200, it is difficult to obtain an improvement effect by addition.

The mixing ratio of the alkylene oxide chain-containing compound is 0.01 parts by weight or more and 50 parts by weight or less (preferably 0.05 parts by weight or more and 40 parts by weight or less) with respect to 100 parts by weight of the solid content of the component (A). Or less, more preferably 0.1 to 30 parts by weight.
When there are too few alkylene oxide chain containing compounds than the said mixing ratio, storage stability may be inferior. Moreover, when there are too many alkylene oxide chain containing compounds, there exists a possibility of causing trouble in water resistance.

  The decorative coating material of the present invention can be produced by uniformly mixing these components by a conventional method, if necessary, in addition to the components (A) to (E). Processing such as pre-combination of the component (B) and the component (C) is not necessary.

The coating film forming method of the present invention is a method for forming an uneven pattern by applying the decorative coating material to a substrate.
The substrate is not particularly limited. For example, cement board, extrusion-molded board, slate board, PC board, ALC board, fiber reinforced cement board, metal siding board, ceramic siding board, ceramic board, calcium silicate board, Examples include gypsum board, plastic board, hard wood cement board, PVC extrusion siding board, plywood and pearlite board. The surface of these base materials may be subjected to some surface treatment (for example, a sealer, a surfacer, a filler, etc.), or may be a surface on which a coating material has been previously formed (old paint film surface).

  A decorative coating material is applied to such a base material using a coating tool such as a trowel, a brush, a spatula, a spray, or a roller to form an uneven pattern.

The coating amount when applying the decorative coating material of the present invention may be appropriately selected depending on the form and application of the decorative coating material, but is about 0.5 to 10 kg / m ² .
In addition, the viscosity of the decorative coating material can be appropriately adjusted by diluting with water or the like during coating. The dilution ratio is usually about 0 to 20% by weight. Drying after coating is usually performed at room temperature, but can be appropriately heated as necessary.
Furthermore, after coating, a surface irregularity pattern can be formed using a trowel, a brush, a spatula, a roller or the like.

  Examples are given below to clarify the features of the present invention. In the examples, each decorative coating material was manufactured using the raw materials shown below.

Emulsion A: Acrylic resin emulsion (methyl methacrylate-styrene-cyclohexyl methacrylate- (2-ethylhexyl acrylate) -methacrylic acid copolymer, pH 8.7, solid content 50% by weight, minimum film-forming temperature 18 ° C., glass transition temperature- 2 ℃)
Emulsion B: Acrylic resin emulsion (methyl methacrylate-styrene-2-ethylhexyl acrylate- (γ-methacryloyloxypropyltrimethoxysilane) -methacrylic acid copolymer, pH 8.9, solid content 50% by weight, minimum film-forming temperature 26 ℃, glass transition temperature 17 ℃)
Pigment: Titanium oxide dispersion (solid content 70% by weight)
-Film-forming aid: 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate-Thickener: Polyurethane thickener-Defoamer: Silicone defoamer-Water dispersible silica A : Silica sol (pH 7.6, solid content 20% by weight, average primary particle size 27 nm, electric conductivity 0.6 mS / cm)
Water-dispersible silica B: silica sol (pH 9.3, solid content 20% by weight, average primary particle size 20 nm, electrical conductivity 1.8 mS / cm)
Fluorine-containing compound A: perfluoroalkylamine oxide (active ingredient 30% by weight, 0.01% aqueous solution surface tension 16.0 mN / m (25 ° C.))
Fluorine-containing compound B: perfluoroalkylethylene oxide adduct (active ingredient 30% by weight, 0.01% aqueous solution surface tension 17.5 mN / m (25 ° C.))
Fluorine-containing compound C: perfluoroalkyl betaine (active ingredient 30% by weight, 0.01% aqueous solution surface tension 16.0 mN / m (25 ° C.))
Fluorine-containing compound D: perfluoroalkyltrimethylammonium salt (solid content 30% by weight, surface tension of 0.01% aqueous solution 17.0 mN / m (25 ° C.))
Fluorine-containing compound E: trifluoroethanol (active ingredient 100% by weight)
Alkylene oxide chain-containing compound: methoxypolyethylene glycol (weight average molecular weight: 1000)
・ Aggregate: Colored aggregate mixture with a particle size of 120 to 300 μm ・ Fiber A: Vinylon fiber with a fiber length of 0.5 mm ・ Fiber B: Nylon fiber with a fiber length of 20 mm

<Manufacture of decorative coating materials (decorative coating materials)>
In accordance with the formulation shown in Table 1, decorative materials 1 to 18 were produced by uniformly mixing the respective raw materials by a conventional method. The compounding amounts in Table 1 are expressed in parts by weight.

Example 1
An epoxy base coat was applied to a 225 × 300 × 6 mm slate plate so that the dry film thickness was 30 μm, and was dried in a standard state for 8 hours. Next, the decorative coating material 1 is applied with a universal gun so that the dry film thickness is about 2 mm. While the decorative coating material 1 is uncured, the coating is applied using a comb iron having an unevenness of about 3 mm. A corrugated concavo-convex pattern was imparted to the film surface and dried and cured for 7 days in a standard state to prepare a test specimen.

About the obtained test body, the external appearance was observed visually and aesthetics evaluation was performed. The evaluation criteria are as follows. The results are shown in Table 2. (Appearance of coating film)
(Double-circle): The external appearance excellent in the aesthetics to which the corrugated uneven | corrugated pattern was provided was obtained.
○: Appearance with a corrugated uneven pattern was obtained.
(Triangle | delta): The uneven | corrugated pattern of a partial wave type was not provided.
X: A corrugated uneven pattern was not given, and the appearance was poor in aesthetics.

In addition, about stability of an uneven | corrugated pattern, the retention degree of the unevenness | corrugation immediately after uneven | corrugated pattern provision was evaluated visually. The evaluation criteria are as follows. The results are shown in Table 2. (Uneven pattern stability 1)
○: The uneven pattern is equivalent to that immediately after painting. Δ: The uneven pattern is broken immediately after painting. ×: The uneven pattern is lost.

  The decorative coating material 1 was also subjected to the following test.

<Storage stability>
After the decorative coating material 1 was produced, the viscosity was measured immediately. Next, the decorative coating material 1 was put in a container, sealed, stored for 15 days in an atmosphere at 50 ° C., and then the viscosity was measured again.

The viscosity change by the above operation was investigated. The evaluation criteria are as follows. The viscosity was measured using a BH viscometer in a standard state (temperature 23 ° C., relative humidity 50%). The results are shown in Table 2.
○: Change in viscosity less than 10% Δ: Change in viscosity from 10% to less than 50% ×: Change in viscosity from 50% or more

<Contact angle>
An epoxy base coat material is applied to a 150 mm × 75 mm × 3 mm slate plate so that the dry film thickness is 30 μm, and is dried for 8 hours in a standard state. Then, the decorative coating material 1 is 1 mm in dry film thickness. A test specimen was prepared by coating the film and drying it under standard conditions for 7 days.
The contact angle of the coating surface of the test specimen obtained by the above method was measured. The contact angle was measured with a CA-A type contact angle measuring device manufactured by Kyowa Interface Science Co., Ltd. The results are shown in Table 2.

<Uneven pattern stability 2>
An epoxy base coat is applied to a 225 × 300 × 6 mm slate plate so that the dry film thickness is 30 μm, and after drying for 8 hours in a standard state, the decorative coating 1 is 2 kg / m ² . In addition, a comb-shaped spatula was used to prepare a test piece having a corrugated uneven pattern in which the height of the convex portion was about 3 mm and the concave portion was a base material. The prepared test specimen was immediately placed vertically in a constant temperature and high humidity chamber having a temperature of 50 ° C. and a humidity of 90%, and after curing for 16 hours, the degree of retention of the concavo-convex pattern was visually confirmed.

With the above operation, the uneven pattern stability was evaluated. The evaluation criteria are as follows. The results are shown in Table 2.
○: The uneven pattern is equivalent to that immediately after painting. Δ: The uneven pattern is broken immediately after painting. ×: The uneven pattern is lost.

<Pollution prevention>
A 300 × 150 × 3 mm aluminum plate bent at a third position from the upper end so that the inner angle was 135 degrees was used as a test substrate. On the convex surface of this test substrate, an epoxy-based primer was spray-coated so that the dry film thickness was 30 μm, and dried in a standard state for 8 hours. Next, the decorative coating material 1 was applied with a universal gun so that the dry film thickness was 2 mm, and dried and cured in a standard state for 7 days.
The specimen obtained by the above method was placed facing south on Ibaraki City, Osaka, with the wide area vertical, and exposed outdoors for 3 months. At this time, the rain streak stain state on the vertical surface was visually observed and evaluated in 5 stages (excellent: 5>4>3>2> 1: poor) according to the degree of stain. The results are shown in Table 2.

Examples 2-9, Comparative Examples 1-11
A specimen was manufactured in the same manner as in Example 1 except that the decorative coating materials 2 to 20 were used instead of the decorative coating material 1.
As a result, in Comparative Examples 7 and 8, a part of the uneven pattern was lost. Moreover, the comparative examples 10 and 11 became a monotonous wall surface. Other than that, the wall surface excellent in the aesthetics to which the corrugated uneven | corrugated pattern was provided was obtained.
Moreover, the test similar to Example 1 was done with respect to the obtained decorative coating materials 2-20. The results are shown in Table 2.

Claims (2)

Synthetic resin emulsion (A),
Water-dispersible silica (B) having a particle size of 1 to 200 nm,
Fluorine-containing compound (C) having at least one functional group selected from the group consisting of a polyfluoroalkyl group , a polyalkylene oxide group, an ethylene oxide group, and an amine oxide group, and / or a polyfluoroalkyl group A fluorine-containing compound (C) having a betaine structure having
An essential component is an aggregate (D) having a particle diameter of 0.05 to 5.0 mm and a fiber (E) having a fiber length of 0.1 to 10 mm,
The water-dispersible silica (B) is 0.1 to 100 parts by weight and the fluorine-containing compound (C) is 0.01 to 10 parts by weight based on 100 parts by weight of the solid content of the synthetic resin emulsion (A). A decorative coating material comprising 100 parts by weight of the aggregate (D) and 0.01 to 10 parts by weight of the fiber (E) . A coating film forming method for forming a concavo-convex pattern by applying a decorative coating material to a substrate,
A coating film forming method using the decorative coating material according to claim 1.