JP2014091750A - Coating agent composition - Google Patents

Abstract

Disclosed is a coating agent composition excellent in solvent resistance of a coating film.
A coating composition containing a synthetic resin, colloidal silica, and a silane coupling agent, wherein the silane coupling agent contains glycidoxysilane. The glycidoxyethoxysilane is 3-glycidoxypropylmethyldiethoxysilane or 3-glycidoxypropyltriethoxysilane or both, and the glycidoxymethoxysilane is 3-glycidoxypropyltrimethoxy Silane is preferred. Immediately before the coating composition is applied to the object, glycidoxysilane is mixed with the mixture of the synthetic resin and colloidal silica.
[Selection figure] None

Description

  The present invention relates to a coating agent composition containing a synthetic resin, colloidal silica, and a silane coupling agent.

Conventionally, as a coating composition containing a synthetic resin and a silane coupling agent, the aqueous resin is 1 to 50% by mass, the guanidine compound is 0.01 to 30% by mass, and the silane coupling agent is 1 to 50%. Aqueous coating material for steel containing mass% (for example, see Patent Document 1), an amine compound containing a silicon atom as a basic substance for neutralizing a carboxyl group contained in an acrylic resin, and, if necessary, a silicon atom. An aqueous curable composition using an hydrazide and / or a semicarbazide derivative as an active hydrogen compound that reacts with a carbonyl group contained in an acrylic resin, together with an amine compound and / or ammonia that are not contained (see, for example, Patent Document 2). ) Etc.
Moreover, as a coating agent composition containing a synthetic resin and colloidal silica, a curable water-based paint composition comprising at least one of colloidal silica and a phosphate compound and a water-based resin (for example, Patent Document 3). Reference)), ethylenically unsaturated monomer (a); 50 to 99.9% by weight, ethyl methacrylate unsaturated monomer (b) having methyl methacrylate, n-butyl acrylate and hydroxyl group; 0.1 to 50 An aqueous dispersion composition obtained by polymerizing 100 parts by weight of a mixed solution composed of 2% by weight, 2-hydroxyethyl methacrylate and 5 to 200 parts by weight (in terms of solid content) of colloidal silica (c) in an aqueous dispersion medium ( For example, see Patent Document 4).

However, these coating agent compositions have a problem that the solvent resistance is not sufficient, and in particular, the solubility resistance to an aromatic solvent is insufficient when an acrylic resin is used as a synthetic resin. Further, when the object to be coated is glass or metal, there is a problem that the adhesion to the object to be coated is not sufficient when immersed in warm water.
JP-A-2005-247906 (pages 2 to 3) JP 2011-26434 A (2nd to 3rd pages) JP 2001-49192 A (pages 2 to 3) JP-A-6-199917 (pages 2 and 3)

  The problem to be solved is to provide a coating agent composition excellent in solvent resistance of the formed coating film.

  The invention relating to the coating agent composition according to claim 1 is a coating agent composition containing a synthetic resin, colloidal silica, and a silane coupling agent, wherein glycidoxysilane is contained in the silane coupling agent. It is the main feature that it is contained.

  The invention about the coating agent composition according to claim 2 is the invention according to claim 1, wherein the content of colloidal silica with respect to 100 parts by mass of the synthetic resin is 50 to 200 parts by mass, and glycidoxysilane The main feature is that the content is 5 to 50 parts by mass.

  The invention relating to the coating agent composition according to claim 3 is the invention according to claim 1 or claim 2, wherein the glycidoxysilane contains glycidoxyethoxysilane and glycidoxymethoxysilane. It is the most important feature.

Invention of the coating agent composition of Claim 4 is invention of any one of Claims 1-3. Content of glycidoxymethoxysilane with respect to 100 mass parts of said glycidoxyethoxysilanes The main feature is that the amount is 25 to 75 parts by mass.

The invention about the coating agent composition according to claim 5 is the invention according to any one of claims 1 to 4, wherein the glycidoxyethoxysilane is 3-glycidoxypropylmethyldiethoxysilane. Alternatively, either or both of 3-glycidoxypropyltriethoxysilane and the most important feature is that the glycidoxymethoxysilane is 3-glycidoxypropyltrimethoxysilane.

The invention relating to the coating agent composition according to claim 6 is the invention according to any one of claims 1 to 5, wherein the 3-glycidoxypropylmethyldiethoxysilane is mixed with 100 parts by mass. The main feature is that the content of glycidoxypropyltriethoxysilane is 50 to 150 parts by mass and the content of 3-glycidoxypropyltrimethoxysilane is 70 to 130 parts by mass.

The invention about the usage method of the coating agent composition of Claim 7 is the said synthetic resin and colloidal silica immediately before coating the coating agent composition of Claims 1-6 with respect to a to-be-coated article. The most important feature is that glycidoxysilane is mixed with a mixture of these.

  According to invention of Claim 1, there exists an advantage that it is excellent in the solvent resistance of the coating film formed with a coating agent composition.

According to invention of Claim 2, there exists an advantage that durability with respect to the aromatic solvent of the coating film formed with a coating agent composition can be improved.

  According to invention of Claim 3, there exists an advantage that it is excellent in stability of the coating agent composition when a synthetic resin is supplied with the form of an emulsion.

  According to invention of Claim 4 or Claim 5, there exists an advantage that it is excellent in the hot-water-resistant adhesiveness to the glass or metal of the coating film formed with a coating agent composition.

  According to the sixth aspect of the present invention, there is an advantage that the adhesion is excellent when the object to be coated is glass or metal and immersed in warm water mixed with a surfactant.

  According to invention of Claim 7, there exists an advantage that it is excellent in the solvent resistance of a coating film formed with a coating agent composition, and hot-water-resistant adhesiveness.

Hereinafter, embodiments embodying the present invention will be described.
The composition of the coating agent composition of the present invention is, for example, as follows.
Composition example of coating agent composition: 100 mass parts of acrylic resin emulsion (non-volatile content 50 mass%) as synthetic resin, 60 mass parts of colloidal silica, 3 mass of 3-glycidoxypropylmethyldiethoxysilane as silane coupling agent Parts, 3 parts by mass of 3-glycidoxypropyltriethoxysilane as a silane coupling agent, 3 parts by mass of 3-glycidoxypropyltrimethoxysilane, 20 parts by weight of water as a diluent, 0.1 mass of antifoaming agent Part, 0.1 part by weight of a wetting agent, 0.1 part by weight of a thickening agent, and 5 parts by weight of 2,2,4-trimethyl-1,3-pentanediol monobutyrate as a film-forming aid.

The synthetic resin is not limited to acrylic resin and can be set arbitrarily. For example, acrylic resin, polyester resin, acrylic resin, fluororesin, epoxy resin, polyurethane resin, polyether resin, vinyl acetate resin, silicone resin, and the like can be given. These may be used singly or in combination of two or more. Moreover, you may use the monomer which comprises each copolymerized.

The form of the synthetic resin is not limited to an emulsion, and it may be used in a form dissolved in a water-soluble polymer, a low molecular weight liquid resin, or an organic solvent.

The nonvolatile content when the synthetic resin is in the form of an emulsion is preferably 10 to 65% by mass, more preferably 20 to 60% by mass, and most preferably 45 to 55% by mass. When it exists in this range, production of a coating agent composition becomes easy. When the non-volatile content when the synthetic resin is in the form of an emulsion is less than 10% by mass, there are too few binding components at the time of coating film formation of the coating agent composition, and the brittleness becomes brittle. On the other hand, when it exceeds 65% by mass, it is difficult to produce a synthetic resin emulsion.

The synthetic resin is preferably an acrylic resin. By using an acrylic resin as the synthetic resin, transparency and weather resistance can be imparted to the coating film formed by the coating agent composition.

The particle diameter of the colloidal silica is preferably 3 to 50 nm, more preferably 5 to 30 nm, and most preferably 7 to 25 nm. When it exists in this range, it is excellent in the transparency of the coating film by a coating agent composition. When the particle diameter of colloidal silica is less than 3 nm, the solvent resistance of the coating film formed by the coating agent composition is not sufficient. On the other hand, when it exceeds 50 nm, colloidal silica may be removed when the coating film formed by the coating agent composition is rubbed.

The colloidal silica is preferably neutralized with ammonia. Since the colloidal silica is neutralized with ammonia, the water resistance of the coating film formed by the coating agent composition is excellent.

The synthetic resin and colloidal silica may be mixed and used separately, or may be used in advance with the synthetic resin by polymerizing the synthetic resin while dropping the colloidal silica. Moreover, you may use both of these.

The silane coupling agent is a compound composed of an organic substance and silicon, and has two or more different reactive groups in the molecule. For example, vinyl silane such as vinyltrimethoxysilane, vinyltriethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropyltrimethoxy, 3 -Glycidoxysilane such as glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropyltriethoxysilane, styrylsilane such as p-styryltrimethoxysilane, 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxy Methacryloxysilane such as propyltrimethoxysilane, 3-methacryloxypropylmethyldiethoxysilane, 3-methacryloxypropyltriethoxysilane, and acryloxysilane such as 3-acryloxypropyltrimethoxysilane N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane, N-2- (aminoethyl) -3-aminopropyltrimethoxysilane, N-2- (aminoethyl) -3-aminopropyltriethoxysilane 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-triethoxysilyl-N- (1,3-dimethyl-butylidene) propylamine, N-phenyl-3-aminopropyltrimethoxysilane, etc. Aminosilane, ureido silane such as 3-ureidopropyltriethoxysilane, 3-mercaptopropylmethyldimethoxysilane, mercaptosilane such as 3-mercaptopropyltrimethoxysilane, sulfide silane such as bis (triethoxysilylpropyl) tetrasulfide, 3- Isocyanate Isocyanate silanes such as propyltriethoxysilane. Of these, glycidoxysilane is preferably used. By using glycidoxysilane as the silane coupling agent, the solvent resistance of the coating film formed by the coating agent composition, especially benzene, styrene, toluene, xylene, phenol, cresol when the synthetic resin is an acrylic resin In addition to improving durability against aromatic solvents such as, adhesion when the object to be coated is glass or metal, particularly adhesion when immersed in warm water of 70 ° C. or more for 8 hours or more (hereinafter, Excellent resistance to hot water adhesion).

By using the colloidal silica and the silane coupling agent, the coating film formed from the coating agent composition has excellent solvent resistance and adhesion to glass or metal as an object to be coated.

The content of colloidal silica and glycidoxysilane with respect to 100 parts by mass of the synthetic resin is preferably 50 to 200 parts by mass of colloidal silica and 5 to 50 parts by mass of glycidoxysilane, more preferably 60 to 150 parts by mass of colloidal silica. 10 to 40 parts by mass of glycidoxysilane, most preferably 80 to 120 parts by mass of colloidal silica and 15 to 30 parts by mass of glycidoxysilane. When it is in this range, the solvent resistance of the coating film formed by the coating agent composition, in particular, the durability against aromatic solvents such as benzene, styrene, toluene, xylene, phenol, cresol and the like can be improved, and the coating The coating film formed by the agent composition has excellent hot water adhesion. When the content of colloidal silica and glycidoxysilane with respect to 100 parts by mass of the synthetic resin is less than 50 parts by mass of colloidal silica and less than 5 parts by mass of glycidoxysilane, the coating film formed by the coating agent composition The solvent resistance is not sufficient and the hot water adhesion to glass or metal is not sufficient. When the content of colloidal silica and glycidoxysilane with respect to 100 parts by mass of the synthetic resin is more than 200 parts by mass of colloidal silica and more than 50 parts by mass of glycidoxysilane, the synthetic resin is supplied in the form of an emulsion. The stability as a coating agent composition is not sufficient, and the hot water adhesion to glass or metal is not sufficient.

The glycidoxysilane preferably contains glycidoxyethoxysilane and glycidoxymethoxysilane. As glycidoxysilane contains glycidoxyethoxysilane and glycidoxymethoxysilane, the stability of the coating composition when the synthetic resin is supplied in the form of an emulsion is improved and the coating composition Excellent resistance to hot water adhesion to glass or metal of a coating film formed by a product.

The content of glycidoxymethoxysilane with respect to 100 parts by mass of glycidoxyethoxysilane is preferably 25 to 75 parts by mass, more preferably 35 to 65 parts by mass, and most preferably 45 to 55 parts by mass. When in this range, the stability as a coating agent composition when the synthetic resin is supplied in the form of an emulsion is excellent, and the coating film formed by the coating agent composition is resistant to hot water to glass or metal. Excellent. When the content of glycidoxymethoxysilane with respect to 100 parts by mass of glycidoxyethoxysilane is less than 25 parts by mass, the adhesion of hot water to glass or metal of the coating film formed by the coating agent composition is not sufficient. . On the contrary, when the content of glycidoxymethoxysilane with respect to 100 parts by mass of glycidoxyethoxysilane exceeds 75 parts by mass, the stability as a coating agent composition when the synthetic resin is supplied in the form of an emulsion is obtained. It is not sufficient, and the adhesion of warm water to glass or metal of the coating film formed by the coating agent composition is not sufficient.

The glycidoxyethoxysilane is 3-glycidoxypropylmethyldiethoxysilane or 3-glycidoxypropyltriethoxysilane or both, and the glycidoxymethoxysilane is 3-glycidoxypropyltrimethoxy Silane is preferred. The glycidoxyethoxysilane is 3-glycidoxypropylmethyldiethoxysilane or 3-glycidoxypropyltriethoxysilane or both, and the glycidoxymethoxysilane is 3-glycidoxypropyltrimethoxy By being a silane, the coating film formed by the coating composition is particularly excellent in hot water adhesion to glass or metal.

The content of 3-glycidoxypropyltriethoxysilane and 3-glycidoxypropyltrimethoxysilane with respect to 100 parts by mass of 3-glycidoxypropylmethyldiethoxysilane is preferably 3-glycidoxypropyltriethoxysilane. Silane 50 to 150 parts by mass, 3-glycidoxypropyltrimethoxysilane 70 to 130 parts by mass, more preferably 3-glycidoxypropyltriethoxysilane 70 to 120 parts by mass, 3-glycidoxypropyltrimethoxy 80 to 120 parts by mass of silane, most preferably 90 to 110 parts by mass of 3-glycidoxypropyltriethoxysilane, and 90 to 110 parts by mass of 3-glycidoxypropyltrimethoxysilane. When in this range, the object to be coated is glass or metal, and adhesion when immersed in warm water of 70 ° C. or higher mixed with a surfactant for 8 hours or longer (hereinafter referred to as “surface active hot water resistant”). In addition to being excellent in the properties, ”sufficient hot water adhesion and solvent resistance can be obtained even if the coating composition is applied to an object and dried at a low temperature of 50 ° C. or lower. The content of 3-glycidoxypropyltriethoxysilane and 3-glycidoxypropyltrimethoxysilane with respect to 100 parts by mass of 3-glycidoxypropylmethyldiethoxysilane is 50 masses of 3-glycidoxypropyltriethoxysilane. If it is less than 70 parts by weight and less than 70 parts by weight of 3-glycidoxypropyltrimethoxysilane, the coating composition formed by the coating agent composition has insufficient resistance to surface active warm water and is coated with the coating agent composition. Resistance to hot water adhesion when dried at a low temperature of 50 ° C. or lower after coating on an object is not sufficient. Conversely, even in the case of more than 150 parts by mass of 3-glycidoxypropyltriethoxysilane and more than 130 parts by mass of 3-glycidoxypropyltrimethoxysilane, the surface active hot water resistance of the coating film formed by the coating agent composition is In addition to being insufficient, the stability of the coating composition is not sufficient and aggregates may be formed.

The film-forming aid is not limited to 2,2,4-trimethyl-1,3-pentanediol monobutyrate and can be arbitrarily set. For example, what is used for a normal coating agent composition, such as ethylene glycol mono-2-ethylhexyl ether, dipropylene glycol monobutyl ether, propylene glycol monobutyl ether, ethylene glycol monobutyl ether, polypropylene glycol monomethyl ether, can be used. Of these, by using 2,2,4-trimethyl-1,3-pentanediol monobutyrate and propylene glycol monobutyl ether in combination, the coating film formed by the coating agent composition is immersed in water. The phenomenon that the coating film turns white (hereinafter referred to as “water whitening phenomenon”) can be suppressed.

When the synthetic resin is used in the form of an emulsion or a water-soluble resin, the diluent is not limited to water, and a water-soluble solvent can be used. Examples thereof include alcohols such as methanol, ethanol and isopropyl alcohol, aqueous ammonia, and the like. When the synthetic resin is held in a form that does not contain water, aromatic solvents such as toluene and xylene, ketones such as methyl ethyl ketone, alcohols such as methanol, ethanol and isopropyl alcohol, esters such as ethyl acetate and butyl acetate, etc. The organic solvent can be used.

The coating agent composition is not limited to an antifoaming agent, a wetting agent, or a thickening agent, and those used in ordinary coating agent compositions can be used. For example, pH adjusters, antifreezing agents such as ethylene glycol and propylene glycol, dispersants, dyes, matting materials such as silica, color pigments such as titanium oxide, zinc oxide, iron oxide, phthalocyanine copper, quinacridone, calcium carbonate, Examples include extender pigments such as talc and preservatives.

The coating agent composition comprised as mentioned above is used as follows.
First, among the coating agent compositions of the above composition examples, 100 parts by mass of an acrylic resin emulsion (nonvolatile content: 50% by mass) as a synthetic resin, 60 parts by mass of colloidal silica, 20 parts by mass of water as a diluent, 0.1 part by weight of a foaming agent, 0.1 part by weight of a wetting agent, 0.1 part by weight of a thickener, and 2,2,4-trimethyl-1,3-pentanediol monobutyrate as a film-forming aid 5 parts by mass of a rate are mixed in advance to prepare a liquid A as a mixed liquid of a synthetic resin and colloidal silica, 3 parts by mass of 3-glycidoxypropylmethyldiethoxysilane as a silane coupling agent, and a silane coupling agent 3 parts by mass of 3-glycidoxypropyltriethoxysilane and 3 parts by mass of 3-glycidoxypropyltrimethoxysilane as And B solution of silane, stirred mixture dropwise slowly Solution B to the A liquid and homogeneous solution. Subsequently, the uniform solution is applied to glass as an object to be coated by spraying to a thickness of 100 μm, left at room temperature for 10 minutes, and then dried in a constant temperature room at 40 ° C. for 20 minutes. Get a membrane. The coating film by the coating composition is an inorganic acid such as hydrochloric acid or sulfuric acid, an inorganic base such as sodium hydroxide, an aromatic solvent such as toluene, xylene or cyclohexane, an ester such as ethyl acetate or butyl acetate, a ketone such as methyl ethyl ketone, Sufficient durability can be obtained against alcohols such as methanol, ethanol and isopropyl alcohol.

Even if the glass plate on which the coating film by the coating agent composition is formed is immersed in a 1% aqueous solution of polyoxyalkylene alkyl ether as a surfactant and heated to 80 ° C., the coating film by the coating agent composition remains It is firmly attached to the glass plate.

It is preferable that the coating is preferably performed within 72 hours, more preferably within 48 hours, and most preferably within 8 hours after mixing the liquid A and the liquid B. When it exists in this range, it is excellent in the solvent resistance of a coating film formed with a coating agent composition, and hot-water-resistant adhesiveness. When it exceeds 72 hours after mixing of A liquid and B liquid, the component of B liquid deactivates by hydrolyzing, and there exists a possibility that the effect of this invention may not fully be acquired.

The room temperature standing time after the coating of the coating agent composition is preferably 5 minutes or more, more preferably 10 minutes or more, and most preferably 15 minutes or more. When in this range, it is easy to obtain a uniform coating film after drying.

The drying time after the coating of the coating composition is preferably 1 day or more when dried at room temperature, 10 minutes or more when dried at 40 ° C., 5 minutes or more when dried at 80 ° C., and more preferably dried at room temperature. 3 days or more, 30 minutes or more at 40 ° C. drying, 10 minutes or more at 80 ° C. drying, most preferably 1 week or more at room temperature drying, 60 minutes or more at 40 ° C. drying In the case of drying at 80 ° C., it is 20 minutes or longer. When it is in this range, the effect of the present invention can be sufficiently obtained after drying.

The drying temperature after the coating of the coating composition is preferably 5 to 120 ° C, more preferably 15 to 100 ° C, and most preferably 20 to 80 ° C. When it exists in this range, it is easy to obtain a uniform coating film after drying. When the drying temperature after application of the coating agent composition is less than 5 ° C., drying may be insufficient. Conversely, when it exceeds 120 ° C., the coating film may be cracked during drying.

The dry film thickness of the coating agent composition can be arbitrarily set. When the dry film thickness is increased, it may be formed by being applied more than once.

This embodiment can exhibit the following effects.
-By the particle diameter of the said colloidal silica being 3-50 nm, it is excellent in the transparency of the coating film by a coating agent composition.

  -By using glycidoxysilane as the silane coupling agent, solvent resistance of the coating film formed by the coating agent composition, especially benzene, styrene, toluene, xylene, phenol when the synthetic resin is an acrylic resin In addition to improving the durability against an aromatic solvent such as cresol, it is excellent in adhesion when the object to be coated is glass or metal, particularly in hot water resistance.

-By using the said colloidal silica and a silane coupling agent, it is excellent in the solvent resistance of the coating film formed with a coating agent composition, and is excellent in the adhesiveness with respect to the glass or metal as a to-be-coated object.

The coating agent composition is formed by the colloidal silica and glycidoxysilane content of 50 to 200 parts by weight of colloidal silica and 5 to 50 parts by weight of glycidoxysilane with respect to 100 parts by weight of the synthetic resin. It can improve the solvent resistance of the film, especially the durability against aromatic solvents such as benzene, styrene, toluene, xylene, phenol, cresol, etc. Excellent.

The glycidoxyethoxysilane is 3-glycidoxypropylmethyldiethoxysilane or 3-glycidoxypropyltriethoxysilane, or the glycidoxymethoxysilane is 3-glycidoxypropyltri By being methoxysilane, the coating film formed by the coating composition is particularly excellent in hot water adhesion to glass or metal.

-Content of 3-glycidoxypropyltriethoxysilane and 3-glycidoxypropyltrimethoxysilane with respect to 100 parts by mass of 3-glycidoxypropylmethyldiethoxysilane is 3-glycidoxypropyltriethoxysilane 50 -150 parts by mass and 3-glycidoxypropyltrimethoxysilane 70-130 parts by mass are excellent in surface active hot water resistance and low temperature of 50 ° C. or less after coating the coating composition on the object. Even if it is made to dry, sufficient hot water adhesion and solvent resistance can be obtained.

In addition, the said embodiment of this invention can also be changed and comprised as follows.
In the above embodiment, after coating the coating agent composition, it was allowed to stand at room temperature for 10 minutes and then dried in a constant temperature room at 40 ° C. for 20 minutes, but it may be dried only at room temperature or provided with room temperature standing time. Without drying, it may be immediately dried at 40 ° C.

-In the said embodiment, although components other than glycidoxysilane are not mixed in B liquid as glycidoxysilane, you may mix in advance the component which does not cause a hydrolysis of glycidoxysilane.

Next, technical ideas other than the invention described in the claims ascertained from the embodiment will be described together with their effects.
(1) The coating agent composition according to any one of claims 1 to 6 is applied to an object to be coated within 72 hours after mixing glycidoxysilane with a mixed liquid of the synthetic resin and colloidal silica. A method of using a coating agent composition characterized by painting.
When comprised in this way, it is excellent in the solvent resistance of a coating film formed with a coating agent composition, and hot-water-resistant adhesiveness.

Hereinafter, examples and comparative examples embodying the embodiment will be described.
The test consists of a liquid A as a mixed liquid of synthetic resin and colloidal silica in the coating agent composition on a surface of a glass plate of 150 mm × 150 mm as a substrate, an aluminum plate, and an iron plate, and a liquid B as glycidoxysilane. The mixture was coated and adjusted to a dry thickness of 80 μm to give a test specimen, which was tested for chemical resistance, hot water adhesion, and surface active hot water resistance.

The chemical resistance test was carried out on the surface of the test piece where the coating composition was formed with a coating agent composition, 10% sulfuric acid aqueous solution, 10% hydrochloric acid aqueous solution, 10% acetic acid aqueous solution, 10% sodium hydroxide aqueous solution, toluene, xylene, ethyl acetate, cyclohexanone. Acetone, acetonitrile, trichloroethylene, dichloroethane, nitrobenzene, dimethylformamide, methanol, and ethanol were dropped at 5 ml and allowed to stand at room temperature for 1 hour, and the appearance change of the coating film was observed. The evaluation was as follows: no change before and after the test: ○, white discoloration but no dissolution of coating film, Δ, coating film no longer dissolved… ×.

The water resistance test was performed by immersing the test specimen in water at room temperature for 8 hours and then observing the appearance change of the coating film. The evaluation was as follows: no change was observed before and after the test, ○, discolored white, but returned to the original when dried… △, discolored white and did not return even when dried… ×.

The hot water adhesion test was performed by immersing the specimen in hot water at 80 ° C. for 24 hours, and then observing the appearance change of the coating film. Evaluation: No change before and after the test ... ○, white color changes but returns to its original state when dried ... △, white color changes and does not return even when dried ... × What peeled off: XX.

The surface active warm water resistance test was conducted by immersing the test specimen in 100 parts by mass of water in an amount of 1 part by weight of detergent A or detergent B and heating it at 80 ° C. for 100 hours. This was done by observing the change. Evaluation: No change before and after the test ... ○, white color changes but returns to its original state when dried ... △, white color changes and does not return even when dried ... × What peeled off: XX.
Composition of detergent a: 0.2 parts by mass of polyoxyalkylene alkyl ether as a surfactant, 2 parts by mass of trisodium citrate as a water softener, and 100 parts by mass of water.
Composition of detergent b: 1 part by mass of polyoxyalkylene alkyl ether as a surfactant, 3 parts by mass of trisodium citrate as a water softener, 1 part by mass of sodium bicarbonate as an alkaline agent, sodium percarbonate as a bleaching agent 0.1 parts by weight.

The heat resistance test was carried out by observing a change in the appearance of the coating film by leaving the test specimen in an atmosphere of 150 ° C. for 2 hours. The evaluation was as follows: no change before and after the test: ○, discoloration to yellowish brown… Δ, discoloration to brown… ×.

Example 1
The composition of the liquid A as a mixed liquid of the synthetic resin and colloidal silica of Example 1 is 100 parts by mass of an acrylic resin emulsion (non-volatile content: 45% by mass) as a synthetic resin, 50 parts by mass of colloidal silica, 0. 1 part by weight, 0.1 part by weight of a wetting agent, 0.03 part by weight of a thickening agent, 7 parts by weight of 2,2,4-trimethyl-1,3-pentanediol monobutyrate as a film-forming aid, an antifreeze agent As 1 part by mass of propylene glycol. The composition of the liquid B as glycidoxysilane is 3 parts by mass of 3-glycidoxypropylmethyldiethoxysilane as a silane coupling agent and 3 parts by mass of 3-glycidoxypropyltriethoxysilane as a silane coupling agent. 3 parts by mass of 3-glycidoxypropyltrimethoxysilane.
After mixing liquid A and liquid B, after 1 hour has elapsed, the coating composition is applied to the substrate, left at room temperature for 5 minutes, and then heated in a constant temperature bath at 80 ° C. for 30 minutes. did.
As a result of the test, the chemical resistance test is ○ for all chemicals, the water resistance test is ○, the warm water resistant adhesion test is ○, the surface active hot water test is ○ for both detergent a and detergent b, The heat resistance test was ○.

(Example 2)
The composition of the liquid A as a mixed liquid of the synthetic resin of Example 2 and colloidal silica is 100 parts by mass of an acrylic resin emulsion (nonvolatile content 45% by mass, the same as that used in Example 1) as a synthetic resin. 50 parts by weight of colloidal silica, 0.1 parts by weight of antifoaming agent, 0.1 parts by weight of wetting agent, 0.03 parts by weight of thickener, 5 parts by weight of propylene glycol monobutyl ether as a film-forming aid, Propylene glycol was 1 part by mass. The composition of the liquid B as glycidoxysilane is 7 parts by mass of 3-glycidoxypropylmethyldiethoxysilane as a silane coupling agent and 7 parts by mass of 3-glycidoxypropyltriethoxysilane as a silane coupling agent. , 7 parts by mass of 3-glycidoxypropyltrimethoxysilane.
After mixing liquid A and liquid B, after 1 hour has elapsed, the coating composition is applied to the substrate, left at room temperature for 15 minutes, and then heated in a thermostatic bath at 80 ° C. for 30 minutes. did.
As a result of the test, the chemical resistance test is ○ for all chemicals, the water resistance test is ○, the warm water resistant adhesion test is ○, the surface active hot water test is ○ for both detergent a and detergent b, The heat resistance test was ○.

(Example 3)
The composition of the liquid A as a mixed liquid of the synthetic resin and colloidal silica of Example 3 is 100 parts by mass of an acrylic styrene copolymer resin emulsion (nonvolatile content 51% by mass) as a synthetic resin, 50 parts by mass of colloidal silica, and defoaming 0.1 parts by weight of the agent, 0.1 part by weight of the wetting agent, 0.03 parts by weight of the thickener, 5 parts by weight of propylene glycol monobutyl ether as a film-forming aid, and 1 part by weight of propylene glycol as the antifreeze agent. The composition of the liquid B as glycidoxysilane is 7 parts by mass of 3-glycidoxypropylmethyldiethoxysilane as a silane coupling agent and 7 parts by mass of 3-glycidoxypropyltriethoxysilane as a silane coupling agent. , 7 parts by mass of 3-glycidoxypropyltrimethoxysilane.
After mixing the A liquid and the B liquid, after 30 minutes, the coating composition was applied to the substrate, left at room temperature for 30 minutes, and then heated in a thermostatic bath at 80 ° C. for 30 minutes. did.
As a result of the test, the chemical resistance test is ○ for all chemicals, the water resistance test is ○, the warm water resistant adhesion test is ○, the surface active hot water test is ○ for both detergent a and detergent b, The heat resistance test was ○.

(Example 4)
The composition of the liquid A as a mixed liquid of the synthetic resin and colloidal silica of Example 4 was an acrylic resin colloidal silica composite emulsion produced by dropping colloidal silica when polymerizing the synthetic resin (non-volatile content: 43% by mass. (Acrylic resin 21% by mass, colloidal silica 22% by mass) 100 parts by mass, defoaming agent 0.1 part by mass, wetting agent 0.1 part by mass, thickener 0.03 part by mass, 2,4-trimethyl-1,3-pentanediol monobutyrate 5 parts by mass and propylene glycol 1 part by mass as a defrosting agent were used. The composition of the liquid B as glycidoxysilane is as follows: 1.5 parts by mass of 3-glycidoxypropylmethyldiethoxysilane as a silane coupling agent, 3-glycidoxypropyltriethoxysilane 1 as a silane coupling agent 0.5 parts by mass and 1.5 parts by mass of 3-glycidoxypropyltrimethoxysilane.
After mixing the liquid A and the liquid B, the coating composition was immediately applied to the substrate, immediately heated in a constant temperature bath at 40 ° C. for 20 minutes, and then allowed to stand at room temperature for 2 weeks to obtain a test specimen.
As a result of the test, the chemical resistance test is ○ for all chemicals, the water resistance test is ○, the warm water resistant adhesion test is ○, the surface active hot water test is ○ for both detergent a and detergent b, The heat resistance test was ○.

(Example 5)
The composition of the liquid A as a mixed liquid of the synthetic resin and colloidal silica of Example 5 was an acrylic resin colloidal silica composite emulsion (non-volatile content: 45% by mass) produced by dropping colloidal silica when polymerizing the synthetic resin. Acrylic resin 29% by mass, colloidal silica 16% by mass) 100 parts by mass, antifoaming agent 0.1 part by mass, wetting agent 0.1 part by mass, thickener 0.03 part by mass, It was set to 4 parts by mass of 2,4-trimethyl-1,3-pentanediol monobutyrate and 1 part by mass of propylene glycol as a defrosting agent. The composition of solution B as glycidoxysilane was 1.5 parts by mass of 3-glycidoxypropylmethyldiethoxysilane as a silane coupling agent.
After mixing liquid A and liquid B, after 80 hours at room temperature, the coating composition was applied to the substrate, immediately heated in a thermostatic bath at 30 ° C. for 15 minutes, and then left at room temperature for 1 day. A test specimen was obtained.
As a result of the test, the chemical resistance test is ○ (toluene, xylene, cyclohexane is △) except for aromatic solvents (toluene and xylene) and cyclohexane, the water resistance test is ○, the hot water adhesion test is ○, In the surface active warm water resistance test, both detergent A and detergent B were Δ, and the heat resistance test was ○.

(Example 6)
The composition of the liquid A as a mixed liquid of the synthetic resin and colloidal silica of Example 6 was an acrylic resin colloidal silica composite emulsion produced by dropping colloidal silica when polymerizing the synthetic resin (non-volatile content: 46% by mass. Acrylic resin 16% by mass, colloidal silica 30% by mass) 100 parts by mass, defoaming agent 0.1 part by mass, wetting agent 0.1 part by mass, thickener 0.03 part by mass, 2,4-trimethyl-1,3-pentanediol monobutyrate 2 parts by mass and propylene glycol 1 part by mass as an antifreeze were used. The composition of solution B as glycidoxysilane was 7 parts by mass of 3-glycidoxypropyltriethoxysilane as a silane coupling agent.
After mixing liquid A and liquid B, after 30 hours at room temperature, the coating composition was applied to the substrate, after 7 minutes at room temperature, and heated in a thermostat at 80 ° C. for 3 minutes, The test specimen was left for 1 week.
As a result of the test, the chemical resistance test is ○ except for aromatic solvents (toluene and xylene) (toluene and xylene is △), the water resistance test is ○, the hot water adhesion test is ○, the surface active hot water resistance As for the property test, both the detergent A and the detergent B were Δ, and the heat resistance test was ○.

(Example 7)
The composition of the liquid A as a mixed liquid of the synthetic resin and colloidal silica of Example 7 was an acrylic resin colloidal silica composite emulsion produced by dropping colloidal silica when polymerizing the synthetic resin (non-volatile content: 45% by mass. Acrylic resin 29% by mass, colloidal silica 16% by mass, the same as that used in Example 5.) 100 parts by mass, antifoaming agent 0.1 part by mass, wetting agent 0.1 part by mass, thickener 0.03 Part by mass, 5 parts by mass of 2,2,4-trimethyl-1,3-pentanediol monobutyrate as a film-forming aid, and 1 part by mass of propylene glycol as an antifreeze agent. The composition of solution B as glycidoxysilane was 2.5 parts by mass of 3-glycidoxypropyltriethoxysilane and 2.5 parts by mass of 3-glycidoxypropyltrimethoxysilane as silane coupling agents.
After mixing liquid A and liquid B, the coating composition was applied to the substrate after 20 hours at room temperature, and after 6 minutes at room temperature, heated in a thermostatic bath at 90 ° C. for 6 minutes. And left as a test body for 3 days.
As a result of the test, the chemical resistance test is ○ except for aromatic solvents (toluene and xylene) (toluene and xylene is △), the water resistance test is ○, the hot water adhesion test is ○, the surface active hot water resistance As for the property test, both the detergent A and the detergent B were Δ, and the heat resistance test was ○.

(Example 8)
The composition of the liquid A as a mixed liquid of the synthetic resin and colloidal silica of Example 8 was an acrylic resin colloidal silica composite emulsion produced by dropping colloidal silica when polymerizing the synthetic resin (non-volatile content: 43% by mass. Acrylic resin 21% by mass, colloidal silica 22% by mass, the same as that used in Example 4.) 100 parts by mass, antifoaming agent 0.1 part by mass, wetting agent 0.1 part by mass, thickener 0.03 The content was 3 parts by mass, 3 parts by mass of dipropylene glycol monobutyl ether as a film-forming aid, and 1 part by mass of propylene glycol as an antifreeze agent. The composition of solution B as glycidoxysilane was 2 parts by mass of 3-glycidoxypropylmethyldiethoxysilane and 4 parts by mass of 3-glycidoxypropyltriethoxysilane as silane coupling agents.
After mixing liquid A and liquid B, the coating composition was applied to the substrate after 12 hours at room temperature, and after 9 minutes at room temperature, the sample was left in a constant temperature bath at 20 ° C. for 6 hours. It was.
As a result of the test, the chemical resistance test is ○ except for aromatic solvents (toluene, xylene, nitrobenzene) and cyclohexane (△ for toluene, xylene, nitrobenzene, cyclohexane), ○ for water resistance test, The test was ◯, the surface active hot water resistance test was △ for both detergents A and B, and the heat resistance test was ◯.

Example 9
The composition of the liquid A as a mixed liquid of the synthetic resin and colloidal silica of Example 9 was an acrylic resin colloidal silica composite emulsion produced by dropping colloidal silica when the synthetic resin was polymerized (non-volatile content: 43% by mass. Acrylic resin 21% by mass, colloidal silica 22% by mass, the same as that used in Example 4.) 100 parts by mass, antifoaming agent 0.1 part by mass, wetting agent 0.1 part by mass, thickener 0.03 The content was 3 parts by mass of propylene glycol monobutyl ether as a film forming aid, and 0.5 parts by mass of ethylene glycol as an antifreeze agent. The composition of the liquid B as glycidoxysilane was as follows: 1 part by mass of 3-glycidoxypropylmethyldiethoxysilane as a silane coupling agent, 3 parts by mass of 3-glycidoxypropyltriethoxysilane, 3-glycidoxy The amount was 4 parts by mass of propyltrimethoxysilane.
After mixing A liquid and B liquid, after 7 hours at room temperature, the coating composition was applied to the substrate, and after 20 minutes at room temperature, heated in a thermostatic bath at 80 ° C. for 10 minutes. And left as a test body for 5 days.
As a result of the test, the chemical resistance test is ○ for all chemicals, the water resistance test is ○, the warm water resistant adhesion test is ○, the surface active warm water resistant test is both detergent A and detergent B, The heat resistance test was ○.

(Example 10)
The composition of the liquid A as a mixed liquid of the synthetic resin and colloidal silica in Example 10 was an acrylic resin colloidal silica composite emulsion (non-volatile content: 43% by mass) produced by dropping colloidal silica when the synthetic resin was polymerized. Acrylic resin 21% by mass, colloidal silica 22% by mass, the same as that used in Example 4.) 100 parts by mass, antifoaming agent 0.1 part by mass, wetting agent 0.1 part by mass, thickener 0.03 The content was 3 parts by mass of propylene glycol monobutyl ether as a film-forming aid, and 0.3 parts by mass of propylene glycol as an antifreeze agent. The composition of the liquid B as glycidoxysilane was such that 0.8 part by mass of 3-glycidoxypropylmethyldiethoxysilane as a silane coupling agent, 0.5 part by mass of 3-glycidoxypropyltriethoxysilane, 3 -Glycidoxypropyl trimethoxysilane 0.7 mass part.
After mixing A liquid and B liquid, after 4 hours at room temperature, the coating composition was applied to the substrate, and after 10 minutes at room temperature, heated in a constant temperature bath at 40 ° C. for 60 minutes, The test specimen was left for 1 week.
As a result of the test, the chemical resistance test is ○ for all chemicals, the water resistance test is ○, the warm water resistant adhesion test is ○, the surface active warm water resistant test is both detergent A and detergent B, The heat resistance test was ○.

(Example 11)
The composition of the liquid A as a mixed liquid of the synthetic resin and colloidal silica of Example 11 was 100 parts by mass of an acrylic silicone copolymer resin emulsion (non-volatile content 47% by mass) as a synthetic resin, 60 parts by mass of colloidal silica, defoaming 0.1 part by weight of the agent, 0.1 part by weight of the wetting agent, 0.03 part by weight of the thickening agent, 5 parts by weight of 2,2,4-trimethyl-1,3-pentanediol monobutyrate as a film-forming aid In addition, 0.1 parts by mass of ethylene glycol as an antifreeze was used. The composition of the liquid B as glycidoxysilane is 1 part by mass of 3-glycidoxypropylmethyldiethoxysilane as a silane coupling agent and 1 part by mass of 3-glycidoxypropyltriethoxysilane as a silane coupling agent. , 1 part by mass of 3-glycidoxypropyltrimethoxysilane.
After mixing liquid A and liquid B, after 5 hours have elapsed, the coating composition is applied to the substrate, left at room temperature for 8 minutes, heated in a constant temperature bath at 20 ° C. for 360 minutes, and then at room temperature. The test specimen was left for 1 month.
As a result of the test, the chemical resistance test is ○ for all chemicals, the water resistance test is ○, the warm water resistant adhesion test is ○, the surface active hot water test is ○ for both detergent a and detergent b, The heat resistance test was ○.

(Example 12)
The composition of the liquid A as a mixed liquid of the synthetic resin and colloidal silica of Example 12 is 100 parts by mass of an acrylic styrene copolymer resin emulsion (non-volatile content 50% by mass) as a synthetic resin, 32 parts by mass of colloidal silica, defoaming 0.1 part by weight of the agent, 0.1 part by weight of the wetting agent, 0.03 part by weight of the thickening agent, 7 parts by weight of 2,2,4-trimethyl-1,3-pentanediol monobutyrate as a film-forming aid In addition, 0.7 parts by mass of ethylene glycol as a defrosting agent was used. The composition of solution B as glycidoxysilane was 3 parts by mass of 3-glycidoxypropyltrimethoxysilane as a silane coupling agent.
After mixing the liquid A and the liquid B, 100 hours later, the coating agent composition was applied to the substrate, and immediately heated in a constant temperature bath at 100 ° C. for 10 minutes to obtain a test specimen.
As a result of the test, the chemical resistance test is ○ except for aromatic solvents (toluene, xylene, nitrobenzene) and cyclohexane (△ for toluene, xylene, nitrobenzene, cyclohexane), ○ for water resistance test, The test was ◯, the surface active hot water resistance test was △ for both detergents A and B, and the heat resistance test was ◯.

(Example 13)
The composition of the liquid A as a mixed liquid of the synthetic resin and colloidal silica of Example 13 is 100 parts by mass of an acrylic polyol resin as a synthetic resin, 85 parts by mass of colloidal silica, 0.1 part by mass of an antifoaming agent, and a wetting agent 0. 0.1 part by mass and 0.03 part by mass of thickener. The composition of solution B as glycidoxysilane was 4 parts by mass of 3-glycidoxypropylmethyldiethoxysilane as a silane coupling agent.
After mixing liquid A and liquid B, after 240 hours have passed, 5 parts by weight of isocyanate is mixed, and the coating composition is immediately applied to the substrate. After 60 minutes at room temperature, in a thermostatic bath at 70 ° C. The specimen was heated for 12 minutes.
As a result of the test, the chemical resistance test is ○ except for aromatic solvents (toluene, xylene) and cyclohexane (toluene, xylene, cyclohexane is △), the water resistance test is ○, the hot water resistance test is ○, In the surface active warm water resistance test, both detergent A and detergent B were Δ, and the heat resistance test was ○.

(Example 14)
The composition of the liquid A as a mixed liquid of the synthetic resin and colloidal silica of Example 14 is 100 parts by mass of chlorinated polyolefin resin as a synthetic resin, 155 parts by mass of colloidal silica, 0.1 part by mass of an antifoaming agent, and a wetting agent. 0.1 mass part and 0.03 mass part of thickener were used. The composition of the liquid B as glycidoxysilane was 5 parts by mass of 3-glycidoxypropyltriethoxysilane and 5 parts by mass of 3-glycidoxypropyltrimethoxysilane as silane coupling agents.
After mixing the liquid A and the liquid B, the coating composition was applied to the substrate after 55 hours had elapsed, and after 30 minutes at room temperature, it was heated in a thermostatic bath at 70 ° C. for 12 minutes to obtain a test specimen.
As a result of the test, the chemical resistance test is ○ except for aromatic solvents (toluene, xylene) and cyclohexane (toluene, xylene is Δ), the water resistance test is ○, the hot water resistance test is ○, the interface resistance The active hot water test was Δ for both detergent A and detergent B, and the heat resistance test was ○.

(Comparative Example 1)
The composition of the liquid A as a mixed liquid of the synthetic resin and colloidal silica of Comparative Example 1 was an acrylic resin colloidal silica composite emulsion produced by dropping colloidal silica when the synthetic resin was polymerized (non-volatile content: 43% by mass. Acrylic resin 21% by mass, colloidal silica 22% by mass, the same as that used in Example 4.) 100 parts by mass, antifoaming agent 0.1 part by mass, wetting agent 0.1 part by mass, thickener 0.03 The content was 3 parts by mass of propylene glycol monobutyl ether as a film-forming aid, and 0.3 parts by mass of propylene glycol as an antifreeze agent. Glycidoxysilane was not used.
A coating composition composed only of the liquid A was applied to the substrate, and after 9 minutes at room temperature, it was heated in a constant temperature bath at 20 ° C. for 360 minutes, and then left at room temperature for 1 month to obtain a test specimen.
As a result of the test, the chemical resistance test was performed on toluene, xylene, ethyl acetate, cyclohexanone, acetone, acetonitrile, trichloroethylene, dichloroethane, nitrobenzene, dimethylformamide × 10% sulfuric acid aqueous solution, 10% hydrochloric acid aqueous solution, 10% sodium hydroxide aqueous solution. Methanol, ethanol △ 10% acetic acid aqueous solution ○, water resistance test ○, warm water resistant adhesion test ×, surface active hot water resistance test × for detergent a, detergent b ×, heat resistance The sex test was x.

(Comparative Example 2)
The composition of the liquid A as a mixed liquid of the synthetic resin of Comparative Example 2 and colloidal silica is 100 parts by mass of an acrylic resin emulsion (nonvolatile content 45% by mass, the same as that used in Example 1) as the synthetic resin. Colloidal silica 50 parts by mass, defoamer 0.1 part by mass, wetting agent 0.1 part by mass, thickener 0.03 part by mass, 2,2,4-trimethyl-1,3- as a film-forming aid 5 parts by mass of pentanediol monobutyrate and 1 part by mass of propylene glycol as an antifreeze agent were used. The composition of solution B as glycidoxysilane was 8 parts by mass of 3-methacryloxypropylmethyldiethoxysilane as a silane coupling agent.
After mixing A liquid and B liquid, after 55 hours, the coating composition was applied to the substrate, left at room temperature for 30 minutes, and then heated in a constant temperature bath at 70 ° C. for 12 minutes. did.
As a result of the test, the chemical resistance test was performed on toluene, xylene, ethyl acetate, cyclohexanone, acetone, acetonitrile, trichloroethylene, dichloroethane, nitrobenzene, dimethylformamide × 10% sulfuric acid aqueous solution, 10% hydrochloric acid aqueous solution, 10% sodium hydroxide aqueous solution. △ for other chemicals, ○ for water resistance test, x for hot water adhesion test, x for surface active hot water resistance test for both detergent A and detergent b, △ for heat resistance test It was.

(Comparative Example 3)
The composition of the liquid A as a mixed liquid of the synthetic resin and colloidal silica of Comparative Example 3 was an acrylic resin colloidal silica composite emulsion produced by dropping colloidal silica when the synthetic resin was polymerized (non-volatile content: 43% by mass. Acrylic resin 21% by mass, colloidal silica 22% by mass, the same as that used in Example 4.) 100 parts by mass, antifoaming agent 0.1 part by mass, wetting agent 0.1 part by mass, thickener 0.03 The content was 3 parts by mass of 2,2,4-trimethyl-1,3-pentanediol monobutyrate as a film-forming aid, and 0.3 parts by mass of propylene glycol as an antifreeze agent. The composition of solution B as glycidoxysilane was 3 parts by mass of 3-aminopropyltrimethoxysilane as a silane coupling agent.
After mixing A liquid and B liquid, after 7 hours at room temperature, the coating composition was applied to the substrate, and after 20 minutes at room temperature, heated in a thermostatic bath at 80 ° C. for 10 minutes. And left as a test body for 5 days.
As a result of the test, the chemical resistance test was performed on toluene, xylene, ethyl acetate, cyclohexanone, acetone, acetonitrile, trichloroethylene, dichloroethane, nitrobenzene, dimethylformamide × 10% sulfuric acid aqueous solution, 10% hydrochloric acid aqueous solution, 10% sodium hydroxide aqueous solution. △ for other chemicals, △ for water resistance test, × for hot water adhesion test, × for surface active hot water test for both detergent A and detergent B, heat resistance test △ It was.

(Comparative Example 4)
The composition of the liquid A as a mixed liquid of the synthetic resin of Comparative Example 4 and colloidal silica is 100 parts by mass of an acrylic resin emulsion (nonvolatile content: 45% by mass, the same as that used in Example 1) as the synthetic resin. Without colloidal silica, 0.1 parts by weight of antifoaming agent, 0.1 parts by weight of wetting agent, 0.03 parts by weight of thickener, 5 parts by weight of propylene glycol monobutyl ether as a film-forming aid, propylene glycol as a defrosting agent The amount was 1 part by mass. The composition of the liquid B as glycidoxysilane is 7 parts by mass of 3-glycidoxypropylmethyldiethoxysilane, 7 parts by mass of 3-glycidoxypropyltriethoxysilane, and 3-glycidoxy as a silane coupling agent. The amount was 7 parts by mass of propyltrimethoxysilane.
After mixing liquid A and liquid B, after 1 hour has elapsed, the coating composition is applied to the substrate, left at room temperature for 15 minutes, and then heated in a thermostatic bath at 80 ° C. for 30 minutes. did.
As a result of the test, the chemical resistance test was performed on toluene, xylene, ethyl acetate, cyclohexanone, acetone, acetonitrile, trichloroethylene, dichloroethane, nitrobenzene, dimethylformamide × 10% sulfuric acid aqueous solution, 10% hydrochloric acid aqueous solution, 10% sodium hydroxide aqueous solution. △ for other chemicals, ○ for water resistance test, x for hot water adhesion test, x for surface active hot water resistance test for both detergent A and detergent b, △ for heat resistance test It was.

Claims (7)

A coating agent composition containing a synthetic resin, colloidal silica, and a silane coupling agent, wherein the silane coupling agent contains glycidoxysilane. The coating agent composition according to claim 1, wherein the content of colloidal silica with respect to 100 parts by mass of the synthetic resin is 50 to 200 parts by mass, and the content of glycidoxysilane is 5 to 50 parts by mass. object. The said glycidoxy silane contains glycidoxy ethoxysilane and glycidoxy methoxysilane, The coating agent composition of Claim 1 or Claim 2 characterized by the above-mentioned. 4. The coating agent composition according to claim 1, wherein the content of glycidoxymethoxysilane with respect to 100 parts by mass of glycidoxyethoxysilane is 25 to 75 parts by mass. The glycidoxyethoxysilane is 3-glycidoxypropylmethyldiethoxysilane or 3-glycidoxypropyltriethoxysilane or both, and the glycidoxymethoxysilane is 3-glycidoxypropyltrimethoxy It is a silane, The coating agent composition of Claims 1-4 characterized by the above-mentioned. The content of 3-glycidoxypropyltriethoxysilane with respect to 100 parts by mass of 3-glycidoxypropylmethyldiethoxysilane is 50 to 150 parts by mass, and the content of 3-glycidoxypropyltrimethoxysilane is 70. It is -130 mass parts, The coating agent composition of Claims 1-5 characterized by the above-mentioned. A coating characterized in that glycidoxysilane is mixed with the mixture of synthetic resin and colloidal silica immediately before the coating agent composition according to claim 1 is applied to an object to be coated. To use the agent composition.