JP2000262965A - Formation of designing coating film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a coating film capable of holding excellent designing property over a long period by applying an under coating material on the surface of a base material, and then applying an inorganic coating material containing a specific inorganic binder and a colored particle having a specific particle diameter. SOLUTION: The under coating material is applied on the surface of the base material and next, the metal alkoxide based inorganic coating material containing 5-200 pts.wt. colored particle having <=3 mm average particle diameter per 100 pts.wt. in total of the binder components are applied. The metal alkoxide based inorganic coating material contains the colored particle having <=3 mm average particle diameter as the colored particle and contains, as ratio of each component, 2-150 pts.wt. binder component expressed in terms of diorganosilane per 100 pts.wt. binder component expressed in terms of organosilane, 0-300 pts.wt. binder component, 0.01-50 pts.wt. condensation reaction accelerating agent component and 5-200 pts.wt. colored particle component per 100 pts.wt. in total of the binder components. The colored particle is at least one kind selected from a group composed of inorganic aggregate, colored resin beads and a pigment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a novel design film, and more particularly to a method for forming a design film having excellent durability.

[0002]

2. Description of the Related Art In recent years, as a method of forming a coating film having excellent design properties, a method of mixing a paint containing an organic resin as a main component with a colored aggregate or the like has been used. However, a coating film containing an organic resin binder as a main component has a problem that durability for maintaining excellent design properties for a long time is insufficient.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for forming a design coating film capable of forming a coating film capable of maintaining excellent design properties for a long period of time.

[0004]

Means for Solving the Problems The present inventors apply an undercoat paint on the surface of a base material, and then apply an inorganic paint containing a specific inorganic binder and colored particles having a specific particle diameter. The present inventors have found that a novel design film capable of maintaining excellent design properties for a long period of time is obtained, and completed the present invention.

That is, the method for forming a decorative coating film of the present invention comprises:
A base coat is applied to the base material surface, and then the average particle size is 3
It is characterized in that a metal alkoxide-based inorganic paint containing 5 to 200 parts by weight of colored particles of not more than mm is added to 100 parts by weight of the total amount of the binder component.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. As the base material for forming a decorative coating film on the surface according to the present invention, there are base materials used for exterior parts and components of buildings, and specifically, inorganic substances such as cements, limes, and plasters. But not limited thereto, such as concrete, cement mortar, asbestos slate, and gypsum board.

Examples of the undercoat paint used in the present invention include various known organic solvent-based, water-based or solvent-free colored paints such as baking type, normal drying type, and active energy ray-curing type.
Combinations of these paints with any of the conventionally known baking type, normal dry type, active energy ray-curable and other organic solvent-based, water-based or solvent-free substrate-reinforcement primers and the like can be mentioned.

The metal alkoxide-based inorganic paint (hereinafter abbreviated as inorganic paint) used in the present invention is preferably the following binder components (a), (b) and (c), and the following condensation reaction accelerator ( d) and the following colored particles (e).

The binder component (a) has the general formula R ¹ Si
It is at least one selected from the group consisting of an organosilane represented by (OR ² ) ₃ and a partially hydrolyzed condensate thereof. R ¹ in the organosilane is an organic group having 1 to 8 carbon atoms, and examples thereof include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, a butyl group, a pentyl group, a hexyl group, Cyclohexyl group, heptyl group,
Other than chain, branched or cyclic alkyl groups such as octyl group, γ-chloropropyl group, vinyl group, 3,3,3-trifluoropropyl group, γ-glycidoxypropyl group,
Functional alkyl groups such as γ-mercaptopropyl group, γ-methacryloxypropyl group, phenyl group, xylyl group, and 3,4-epoxycyclohexylethyl group, and aryl groups are exemplified. If the carbon number of R ¹ exceeds 8, the hydrolysis rate, the drying property of the coating film, and the hardness may decrease, which is not preferable. R ² in the organosilane is a hydrogen atom, an alkyl group having 1 to 5 carbon atoms or an acyl group having 1 to 4 carbon atoms, and examples thereof include a methyl group, an ethyl group, an n-propyl group, Examples thereof include an i-propyl group, an n-butyl group, a sec-butyl group, a tert-butyl group, and an acetyl group. If the carbon number of R ² exceeds 5, the hydrolysis rate, the drying property of the coating film, and the hardness may decrease, which is not preferable.

Specific examples of these organosilanes include methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, n-propyltrimethoxysilane, n-propyltriethoxysilane, i-propyl Trimethoxysilane, i-propyltriethoxysilane, γ-chloropropyltrimethoxysilane, γ-chloropropyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, 3,3,3-trifluoropropyltrimethoxysilane, 3,3,3-trifluoropropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-methacryloxy Triethoxysilane, .gamma.-mercaptopropyltrimethoxysilane, .gamma.
Mercaptopropyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, 3,4
-Epoxycyclohexylethyltrimethoxysilane,
3,4-epoxycyclohexylethyltriethoxysilane and the like can be mentioned, and preferably, methyltrimethoxysilane and methyltriethoxysilane can be mentioned.

These organosilanes and their partially hydrolyzed condensates can be used alone or in combination of two or more. Further, it is preferable that 80 mol% or more of the binder component (a) is CH ₃ Si (OR ² ) ₃ . The weight average molecular weight of the binder component (a) is preferably from 800 to 100,000, and more preferably from 1,000 to 50,000.

[0012] Binder component (b) has the general formula R ¹ ₂ Si
It is at least one selected from the group consisting of a diorganosilane represented by (OR ² ) ₂ and a partially hydrolyzed condensate thereof. The binder component (b) has a function of softening a coating film and improving bending workability of the coating film. R ¹ and R ² such in diorganosilane are the same as R ¹ and R ² of the organosilane.

Specific examples of these diorganosilanes include dimethyldimethoxysilane, dimethyldiethoxysilane, diethyldimethoxysilane, diethyldiethoxysilane, di-n-propyldimethoxysilane, di-n-
Propyldiethoxysilane, di-i-propyldimethoxysilane, di-i-propyldiethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane and the like can be mentioned, and preferably dimethyldimethoxysilane and dimethyldiethoxysilane are mentioned. Can be.

These diorganosilanes and partially hydrolyzed condensates thereof can be used alone or in combination of two or more. The weight average molecular weight of the binder component (b) is preferably 800 to 100,000, and more preferably 1,000 to 50,000. Further, the binder component (b) can be used as a co-condensate with the binder component (a), and the weight-average molecular weight of the co-condensate is preferably 800 to 100,000, more preferably 1,000 to 50. , 000.

The proportion of the binder component (b) in the inorganic coating used in the present invention is 2 to 150 parts by weight in terms of diorganosilane with respect to 100 parts by weight of the binder component (a) in terms of organosilane. Preferably 5 to 10
0 parts by weight, more preferably 10 to 60 parts by weight.
If the proportion of the binder component (b) is less than 2 parts by weight, the coating film tends to be insufficient in flexibility and bendability, which is not preferred. On the other hand, if the amount exceeds 150 parts by weight, the hardness and stain resistance of the coating film tend to decrease, which is not preferable.

The binder component (c) is composed of a vinyl polymer having a carbon skeleton as a main chain, and a silyl group having a silicon atom bonded to a hydrolyzable group and / or a hydroxyl group is added to a terminal or side chain of the polymer. At least one per molecule of polymer
, Preferably two or more.

Most of the silyl groups have the general formula [Wherein, R ¹ and R ² are the same as above, and n represents an integer of 1 to 3].

The binder component (c) is, for example, a compound represented by the general formula [Wherein R ¹ and R ² are the same as above, and X represents a monovalent organic group having 2 to 10 carbon atoms and containing a radically polymerizable double bond]. , Simply referred to as "radical polymerizable silane compound") and various vinyl compounds in the presence of a radical generating compound by a known method. Examples of such an organic group X include vinyl, 2-propenyl, 3-acryloxypropyl, 3-methacryloxypropyl, 4-vinylphenyl, and 2- (4-vinyl).
Phenylethyl and the like can be mentioned.

Such various vinyl compounds are not particularly limited as long as an adduct with the radically polymerizable silane compound can be obtained. Examples thereof include methyl (meth) acrylate, (Meth) acrylic acid alkyl esters such as ethyl (meth) acrylate, butyl (meth) acrylate and 2-hydroxyethyl (meth) acrylate; unsaturated carboxylic acids such as (meth) acrylic acid, itaconic acid and fumaric acid Acid; and acid anhydrides such as maleic anhydride; epoxy compounds such as glycidyl (meth) acrylate; dimethylaminoethyl (meth)
Amino compounds such as acrylate and aminoethyl vinyl ether; (meth) acrylamide, crotonamide,
Amide compounds such as itaconic amide and maleic amide; one or more selected from acrylonitrile, methacrylonitrile, styrene, α-methylstyrene, vinyl chloride, vinyl acetate, vinyl propionate and the like.

Preferred examples of these vinyl compounds include alkyl (meth) acrylates, more preferably alkyl methacrylates, particularly preferably methyl methacrylate, ethyl methacrylate, and butyl methacrylate. And cyclohexyl methacrylate.

The ratio of the radically polymerizable silane compound in the binder component (c) thus produced is as follows:
It is usually 0.01 to 20% by weight, preferably 0.1 to 10% by weight, calculated as the weight% of the silicon element with respect to the total weight of the binder component (c). When the amount is less than 0.01% by weight, the effect of improving weather resistance and adhesion tends to decrease, while when it exceeds 20% by weight, the storage stability of the coating tends to decrease.

The molecular weight of the binder component (c) is
The weight average molecular weight evaluated by gel permeation chromatography (GPC) is usually 5,000 to 100,
000, preferably 10,000 to 50,000. Those having a weight average molecular weight of less than 5,000 or more than 100,000 are not preferred because the viscosity is too low or too high, which may lower the coating workability. The binder component (c) has a glass transition temperature determined by a differential thermal analysis method of usually −60 ° C. to +
150 ° C. When the temperature is lower than -60 ° C, sufficient coating film hardness tends not to be obtained. On the other hand, when the temperature is higher than 150 ° C, the film forming property tends to decrease. As these binder components (c), one kind of compound may be used, or two or more kinds of compounds may be used in combination.

The proportion of the binder component (c) in the inorganic coating material used in the present invention is 0 to 300 parts by weight based on 100 parts by weight of the binder component (a) in terms of organosilane. Since the binder component (c) has a function of improving the bending adhesion of the coating film, it is preferably 50 to 200.
Parts by weight, more preferably 80 to 150 parts by weight.
If the amount exceeds 300 parts by weight, the weather resistance and stain resistance of the obtained coating film may decrease.

The metal chelate compound of the component (d) has a general formula of Zr (OR ³ ) _p (R ⁴ COCHCOR ⁵ ) _4-p , Ti
(OR ³ ) _q (R ⁴ COCHCOR ⁵ ) _4-q and Al (OR
_{^{3) r (R 4 COCHCOR 5}} ) is at least one selected from the group consisting of compounds represented by _3-r, the condensation reaction between the binder components (a) ~ (b) the binder component (c) Promote.

R ³ and R ⁴ in the component (d) are the same or different groups, and each is an alkyl group having 1 to 6 carbon atoms, specifically, an ethyl group, an n-propyl group, an i-propyl group,
n-butyl group, sec-butyl group, t-butyl group, n-
Examples include a pentyl group and a phenyl group. R ⁵ is an alkyl group having 1 to ⁵ carbon atoms or an alkoxy group having 1 to 16 carbon atoms. Examples of the alkoxy group include a methoxy group, an ethoxy group, an n-propoxy group, an i-propoxy group, and an n-
Butoxy group, sec-butoxy group, t-butoxy group, lauryloxy group, stearoxy group and the like. Further, p and q in the component (d) are integers of 0 to 3, and r is an integer of 0 to 2.

Specific examples of the metal chelate compound of component (d) include zirconium tri-n-butoxy (ethylacetoacetate), zirconium di-n-butoxy-bis (ethylacetoacetate), and zirconium n-butoxy-tris. (Ethyl acetoacetate) zirconium,
Zirconium chelate compounds such as tetrakis (n-propylacetoacetate) zirconium, tetrakis (acetylacetoacetate) zirconium, tetrakis (ethylacetoacetate) zirconium; diisopropoxy-bis (ethylacetoacetate) titanium;
Diisopropoxy-bis (acetylacetate) titanium, diisopropoxy-bis (acetylacetate)
Titanium chelate compounds such as titanium; diisopropoxy (ethylacetoacetate) aluminum, diisopropoxy (acetylacetonato) aluminum, isopropoxy-bis (acetylacetonato) aluminum, tris (ethylacetoacetate) aluminum, tris (acetylacetoacetate) And aluminum chelate compounds such as sodium (aluminate) and monoacetylacetonato-bis (ethylacetoacetate) aluminum. Among these metal chelate compounds, tri-n-butoxy (ethylacetoacetate) zirconium, diisopropoxy-bis (acetylacetonate) titanium, diisopropoxy (ethylacetoacetate) aluminum, tris (ethylacetoacetate) aluminum Is preferred. These metal chelate compounds can be used alone or in combination of two or more. Also, component (d)
As such, partially hydrolyzed products of these metal chelate compounds can also be used.

The proportion of the component (d) in the inorganic coating used in the present invention is 0.01 to 50 parts by weight per 100 parts by weight of the binder component (a) in terms of organosilane.
Preferably 0.1 to 40 parts by weight, more preferably 0.1 to 40 parts by weight.
5 to 30 parts by weight. If the amount is less than 0.01 part by weight, the formation of a copolymer of the binder components (a) and (b) and the binder component (c) becomes insufficient, and the hardness of the coating film tends to decrease. If the amount exceeds 50 parts by weight, the bending adhesion of the coating film is undesirably reduced.

The colored particles of the component (e) have an average particle size of 3 mm
The following colored particles are required, and the average particle size is 50 μm or more.
It is preferably about 3 mm. Examples of the colored particles used in the present invention include inorganic aggregates, colored resin beads, and pigments.

Examples of the inorganic aggregate include diatomaceous earth, silica, spherical silica, alumina, titanium dioxide, glass,
Calcium carbonate, iron, nickel, stainless steel, iron oxide,
Examples thereof include aluminum, colored glass beads, and glass fiber, and two or more of these can be used in combination.

Examples of the colored resin beads include resin beads made of acrylic resin, urethane resin, polyamide resin, urea / formaldehyde resin, silicone resin, fluororesin, phenol resin, melamine / formaldehyde resin, polyacrylonitrile beads, benzoguanamine beads. And nylon beads.

Examples of the pigment include pearl pigment, colored glass powder, inorganic pigment, organic pigment and the like. In the present invention, the use of transparent aggregates such as transparent glass and transparent resin beads is not preferred because desired design properties cannot be obtained.

The proportion of the component (e) in the inorganic coating used in the present invention is 5 to 200 parts by weight, preferably 10 to 160 parts by weight, based on 100 parts by weight of the total amount of the binder components in the inorganic coating. It is. If the amount is less than 5 parts by weight, the design is insufficient, while if it exceeds 200 parts by weight, it is difficult to form a uniform continuous coating film, which is not preferable.

The inorganic paint used in the present invention may contain, as pigments, coloring pigments, rust-preventive pigments, and other pigments for imparting other functions, in addition to the above-mentioned components. Examples of coloring pigments include inorganic pigments such as yellow iron oxide, titanium yellow, red iron oxide, titanium oxide, zinc white, lithopone, zinc sulfide, and antimony oxide, Hansa Yellow 5G, permanent yellow FGL, phthalocyanine blue, and indanthrene blue RS. , Permanent Red F5RK, Brilliant First Scarlet G, Paliogen Red 39
Organic pigments such as 10 can be used.

The inorganic paint used in the present invention can be made into any form of paint such as enamel, clear and color clear by adding the above-mentioned pigments as required and increasing or decreasing the amount of the pigment.

In the method for forming a decorative coating film of the present invention, the inorganic paint prepared by the above combination is applied to the surface of the base material coated with the undercoat paint. At this time, the application amount of the inorganic paint is preferably 10 to 400 g / m ² . When the coating amount of the inorganic paint is less than 10 g / m ² ,
Undercover tends to be insufficient, and conversely 400g
If it exceeds / m ² , cracks tend to occur on the surface of the dried coating film, which is not preferable.

[0036]

EXAMPLES The present invention will be described more specifically with reference to the following Examples, but it should not be construed that the invention is limited thereto. In Examples and Comparative Examples, “parts” and “%” are based on weight unless otherwise specified. Various measurements in the examples are as follows.

The weight average molecular weight and the number average molecular weight in terms of polystyrene were measured by gel permeation chromatography (GPC) under the following conditions. The sample was prepared by dissolving 1 g of organopolysiloxane in 100 cc of tetrahydrofuran using tetrahydrofuran as a solvent. As standard polystyrene, standard polystyrene manufactured by Pressure Chemical Co., USA was used. The silyl group-containing vinyl resin was prepared by dissolving 0.1 g in 100 cc of tetrahydrofuran. Apparatus: Waters, USA, high-temperature high-speed gel permeation chromatogram (model 150-C ALC / GPC) Column: Showa Denko KK, SHOdex A-80
M, length 50 cm, measurement temperature: 40 ° C., flow rate: 1 cc / min.

<Coating Film Evaluation Criteria> Appearance: The uniformity of the coating film was visually evaluated. Design: Monotone color tone was evaluated as x, and natural stone tone or other high-grade appearance was evaluated as ○. Transparency: Judged visually. Stain resistance: Draw a line on the coating with oil-based black magic ink,
After drying at room temperature for one day, the methanol was wiped off with wet gauze.
And Weather resistance: Sunshine accelerated weather resistance test was performed for 3,000 hours, and those having no abnormal appearance were evaluated as ○, gloss, peeling,
Those with discoloration were rated as x.

<Preparation of Silyl Group-Containing Vinyl Resin> In a reactor equipped with a reflux condenser and a stirrer, 90 parts of methyl methacrylate, 40 parts of n-butyl acrylate, 20 parts of γ-methacryloxypropyltrimethoxysilane, and xylene 130 parts were added and mixed, and then stirred at 80 ° C.
Azobisisovaleronitrile 4
Of xylene dissolved in 10 parts of xylene was added dropwise over 30 minutes, and further reacted at 80 ° C. for 5 hours to obtain a solid content concentration of 5 parts.
A 0% silyl group-containing vinyl resin solution was obtained. The number average molecular weight of this silyl group-containing vinyl resin in terms of polystyrene measured by gel permeation chromatography is 1
It was estimated to be 2,000, containing an average of 6 silyl groups per polymer molecule.

<Preparation of Organopolysiloxane> In a reactor equipped with a reflux condenser and a stirrer, 100 parts of methyltrimethoxysilane as the binder component (a), 30 parts of dimethyldimethoxysilane as the binder component (b), and ion exchange were performed. After adding and mixing 25 parts of water and 0.01 parts of 0.1 N hydrochloric acid, the mixture is heated to 60 ° C. with stirring, and hydrolyzed and condensed at the same temperature for 3 hours to give an organopolyorganic solid having a solid concentration of 44%. A polysiloxane solution was obtained. The weight average molecular weight of this organopolysiloxane was 1,500.

<Preparation of Formulations a to c> The components shown in Table 1 were added to a reactor equipped with a stirrer and a reflux condenser in the amounts shown in Table 1, mixed, and then mixed with 30 parts of ion-exchanged water. And hydrolyzed and condensed at 60 ° C. for 4 hours. Thereafter, the mixture was cooled to room temperature to obtain formulations ac. <Preparation of Formulations df> The components shown in Table 1 were blended in the amounts shown in Table 1 to obtain formulations df.

<Examples 1 to 3 and Comparative Examples 1 to 3> Commercially available acrylic emulsion paint (V-Selan # 300 gray;
(Dai Nippon Paint Co., Ltd.) was spray-coated on a flexible board and dried in a drying oven at 130 ° C. for 10 minutes.

On the other hand, 100 parts of each of formulations a to e other than formulation f shown in Table 1 had an average particle diameter of 100 μm.
Colored urethane beads black 10 parts, yellow 8 parts, rust color 2
To prepare a colored clear paint. To these colored clear paints, 2% of dibutyltin laurate was added as a curing accelerator, spray-coated on the above-mentioned primed board, and dried in an oven at 100 ° C. for 10 minutes. The appearance, design, transparency, and stain resistance of the coating film thus formed were evaluated according to the above-mentioned coating film evaluation criteria. Table 1 shows the results.

[0044] Note 1) “Semi” in the transparency column of the evaluation result means translucent.

[0045]

According to the method for forming a designable coating film of the present invention, a durable coating film having excellent appearance, design properties, stain resistance and weather resistance can be formed. In addition, the metal alkoxide-based inorganic coating used in the present invention can form a coating film having high hardness and excellent durability without containing colored particles, but in that case, it can follow the behavior of the base substrate. May cause microcracks. However, by containing colored particles, the propagation of microcracks can be prevented,
Good performance can be ensured. In addition, since the curing strength of the metal alkoxide-based inorganic paint is high, the holding strength of the colored particles is increased, and the colored particles do not fall off, so that high coating film performance can be maintained. Furthermore, even if the metal alkoxide-based inorganic paint is a clear paint, it can scatter ultraviolet rays by containing colored particles, and can protect the underlayer from deterioration by ultraviolet rays. May be any coating film (for example, an organic coating film). (When the coating film containing colored particles is an organic coating film, the same effect is initially obtained by containing the coloring particles. Although it can be expected, the organic coating film gradually deteriorates due to ultraviolet rays, and the colored particles fall off, so that a long-term effect cannot be expected).

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Satoshi Kitagawa 1-4-1 Shinsenri-Nishimachi, Toyonaka-shi, Osaka National Housing Industry Co., Ltd. (72) Inventor Hitoshi Kumagai 1-1-1, Shinsenri-nishimachi, Toyonaka-shi, Osaka No. 4 Inside the National Housing Industry Co., Ltd. (72) Inventor Masami Matsushita 1-4-1 Shinsenri Nishimachi, Toyonaka City, Osaka Prefecture Inside (72) Inventor Koji Matsunaga Koji Shinsenri Nishimachi, Toyonaka City, Osaka Prefecture 1-4-1 National Housing Industry Co., Ltd. (72) Inventor Mitsuhiko Asakura 2-26-2-210 Kojidai, Nishi-ku, Kobe-shi, Hyogo (72) Inventor Junya Tamada 4-3-Yamato-Higashi, Kawanishi-shi, Hyogo 68 (72) Inventor Mitsuhiro Matsuda 2-4-6 Hirata, Ibaraki-shi, Osaka (72) Inventor Satoshi Fujii 3--22-20 Tarumicho, Suita-shi, Osaka F-term (reference) 2 E110 AA65 AB04 AB23 AB42 BA02 BB04 BB09 GA43W GB12W GB16W GB19W GB23W GB42W 4D075 AE03 CB00 DA06 DB12 DC02 EA02 EA05 EB42 EB56 EB57 EC01 EC08 EC53 EC54

Claims (4)

[Claims] An undercoat paint is applied to the surface of a substrate,
A method for forming a decorative coating film, comprising applying a metal alkoxide-based inorganic paint containing 5-200 parts by weight of colored particles having an average particle diameter of 3 mm or less based on 100 parts by weight of the total amount of the binder component. 2. A metal alkoxide-based inorganic paint comprising: (a) a general formula R ¹ Si (OR ² ) _{3 wherein} R ¹ is an organic group having 1 to 8 carbon atoms, R ² is a hydrogen atom, at least one selected from the group consisting of organosilane and a partial hydrolysis-condensation product represented by an alkyl group or an acyl group having 1 to 4 carbon atoms of 1 to 5 carbon atoms], (b) the general formula R ¹ ₂ Si (OR ² ) _{2 wherein} R ¹ and R ²
Is the same as described above], and at least one selected from the group consisting of diorganosilanes and partially hydrolyzed condensates thereof
A species or a co-condensate of (a) and (b), and (c) a polymer having a silyl group having a silicon atom bonded to a hydrolyzable group and / or a hydroxyl group at a terminal or side chain of the polymer. It contains at least one silyl group-containing vinyl resin bonded per molecule, and as a condensation reaction accelerator, (d) a general formula Zr (OR ³ ) _p (R ⁴ COCHCOR ⁵ )
_4-p , Ti (OR ³ ) _q (R ⁴ COCHCOR ⁵ ) _4-q and Al (OR ³ ) _r (R ⁴ COCHCOR ⁵ ) _{3-r where} R
³ and R ⁴ are the same or different groups, each having an alkyl group having 1 to 6 carbon atoms; R ⁵ is an alkyl group having 1 to ⁵ carbon atoms or an alkoxy group having 1 to 16 carbon atoms;
And r represents an integer of 0 to 2], and at least one metal chelate compound selected from the group consisting of the compounds represented by the following formulas; and (e) colored particles having an average particle diameter of 3 mm or less. The composition contains particles, and the ratio of each component is 2 to 150 parts by weight of the binder component (b) in terms of diorganosilane and 100 parts by weight of the binder component (c) based on 100 parts by weight of the binder component (a) in terms of organosilane. 0 to 300 parts by weight, component (d) 0.01 to 5
The method for forming a decorative coating film according to claim 1, wherein the component (e) is 5 to 200 parts by weight based on 0 parts by weight and 100 parts by weight of the total amount of the binder component. 3. The method according to claim 1, wherein the colored particles are at least one selected from the group consisting of inorganic aggregates, colored resin beads, and pigments. . 4. The coating amount of the metal alkoxide-based inorganic paint is 1
The weight ratio is from 0 to 400 g / m ² ,
4. The method for forming a decorative coating film according to 2 or 3.