JP6918083B2 - Aqueous resin composition for sealer - Google Patents

Description

The present invention relates to an aqueous resin composition for a sealer. More specifically, the present invention describes, for example, an aqueous resin composition for a sealer useful for a sealer used for an inorganic building material such as a ceramic building material and a method for producing the same, a sealer containing the aqueous resin composition for the sealer, and the said. The present invention relates to an inorganic substrate having a coating film consisting of a sealer.

In recent years, from the viewpoint of environmental protection, an aqueous undercoat coating composition containing a resin emulsion (see, for example, Patent Document 1) and an aqueous two-component undercoat coating composition containing a copolymer emulsion as a main component (for example, Patent Document 2). See) etc. have been proposed. In these undercoat coating compositions, since the coating film is formed by fusion of resin particles, it is necessary to use a large amount of a film-forming auxiliary when the glass transition temperature of the resin is high. However, when a large amount of the film-forming auxiliary is used, the blocking resistance is lowered by the film-forming auxiliary contained in the coating film, so that the coating film is easily damaged and the surface protection of the object to be coated becomes insufficient. Or it may spoil the aesthetics of the object to be coated.

As an aqueous coating composition having improved blocking resistance, an aqueous resin composition in which particles having a multilayer structure are dispersed has been proposed (see, for example, Patent Document 3). However, the water-based resin composition has the disadvantages of being inferior in film-forming property and water permeability of the coating film because it is necessary to raise the glass transition temperature of the shell portion of the particles in order to impart blocking resistance. be.

Therefore, in order to improve the blocking resistance, it is conceivable to increase the content of the inorganic filler in the water-based coating composition. However, when the content of the inorganic filler in the water-based coating composition is increased, the blocking resistance is improved, but the water permeability, impregnation adhesion, bending resistance and moisture permeability of the formed coating film are lowered. There is a drawback of doing.

Japanese Unexamined Patent Publication No. 2001-335735 Japanese Unexamined Patent Publication No. 2001-262053 Japanese Unexamined Patent Publication No. 2002-012816

The present invention has been made in view of the above-mentioned prior art, and is excellent in water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability even if the content of the inorganic filler is high. It is an object of the present invention to provide an inorganic base material having a water-based resin composition for a sealer, a sealer containing the water-based resin composition for a sealer, and a coating film comprising the sealer.

The present invention
(1) An aqueous resin composition used for a sealer, which contains emulsion particles having a plurality of resin layers, a polyoxyalkylene alkyl ether having an addition molar number of 2 to 80 oxyalkylene groups, and an inorganic filler. An aqueous resin composition for a sealer, which comprises an acetoxy group-containing monomer as a monomer component used as a raw material for an outer layer of emulsion particles.
(2) A method for producing an aqueous resin composition used for a sealer, which comprises emulsion particles having a plurality of resin layers, a polyoxyalkylene alkyl ether having an addition molar number of 2 to 80 oxyalkylene groups, and an inorganic filler. Production of an aqueous resin composition for a sealer, which comprises containing an acetoacetoxy group-containing monomer in a monomer component used as a raw material for an outer layer of emulsion particles when preparing an aqueous resin composition to be contained. Method,
(3) The present invention relates to a sealer containing the aqueous resin composition for a sealer according to the above (1), and (4) an inorganic base material having a coating film composed of the sealer according to the above (3).

According to the present invention, a water-based resin composition for a sealer, which is comprehensively excellent in water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability even if the content of the inorganic filler is high, the sealer. A sealer containing an aqueous resin composition for use and an inorganic base material having a coating film composed of the sealer are provided.

As described above, the aqueous resin composition for a sealer of the present invention is an aqueous resin composition used for a sealer, and is an emulsion particle, a polyoxyalkylene alkyl ether having 2 to 80 additional moles of an oxyalkylene group, and an inorganic substance. When the content of the inorganic filler in the total solid content of the polyoxyalkylene alkyl ether containing the filler and the number of added moles of the emulsion particles and the oxyalkylene group is 2 to 80 and the inorganic filler is 50 to 85% by mass. The inorganic filler is characterized by containing carbonate in a content of 80 to 100% by mass.

Since the water-based resin composition for a sealer of the present invention has the above-mentioned constituent requirements, it is comprehensive in water permeability resistance, blocking resistance, impregnation adhesion resistance, bending resistance and moisture permeability even if the content of the inorganic filler is high. Is excellent.

In the present invention, the "impregnation adhesion" means the property that the coating film is in close contact with the base material after the inorganic base material on which the coating film is formed is immersed in water.

Generally, in order to improve the blocking resistance of the coating film, it is considered to increase the content of the inorganic filler in the aqueous resin composition for a sealer. However, when the content of the inorganic filler in the water-based resin composition for a sealer is high, it is considered that the water permeability, impregnation adhesion, bending resistance and moisture permeability of the coating film may be lowered.

On the other hand, the aqueous resin composition for a sealer of the present invention contains a polyoxyalkylene alkyl ether having an addition molar number of 2 to 80 oxyalkylene groups and an inorganic filler, and adds emulsion particles and oxyalkylene groups. The content of the inorganic filler in the total solid content of the polyoxyalkylene alkyl ether having a molar number of 2 to 80 and the inorganic filler is 50 to 85% by mass, and the inorganic filler contains 80 to 100% by mass of carbonate. Since it is contained in terms of content, the content of the inorganic filler in the total solid content of the polyoxyalkylene alkyl ether having 2 to 80 moles of the emulsion particles and the oxyalkylene group and the inorganic filler is high. However, a coating film having overall excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability is formed.

Examples of the monomer component used as a raw material for emulsion particles include alkyl (meth) acrylate, hydroxyl group-containing (meth) acrylate, carboxyl group-containing monomer, aromatic monomer, nitrogen atom-containing monomer, and aceto. Examples thereof include an acetoxy group-containing monomer, an oxo group-containing monomer, a fluorine atom-containing monomer, an epoxy group-containing monomer, an ultraviolet-absorbing monomer, and an ultraviolet-stable monomer. , It is not limited to such an example. These monomers may be used alone or in combination of two or more.

In addition, in this specification, "(meth) acrylate" means "acrylate" or "methacrylate", and "(meth) acrylic" means "acrylic" or "methacrylic".

Examples of the alkyl (meth) acrylate include methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, tert-butyl (meth) acrylate, and sec-butyl (meth). Acrylate, 2-ethylhexyl (meth) acrylate, tridecyl (meth) acrylate, cyclohexyl (meth) acrylate, n-octyl (meth) acrylate, n-lauryl (meth) acrylate, 2- (acetoacetoxy) ethyl (meth) acrylate, etc. Examples thereof include alkyl (meth) acrylates having 1 to 18 carbon atoms in the ester group of the above, but the present invention is not limited to these examples. These monomers may be used alone or in combination of two or more.

The content of alkyl (meth) acrylate in all the monomer components used as the raw material of emulsion particles is a coating film with comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. From the viewpoint of forming the above, the content is preferably 5 to 35% by mass, more preferably 10 to 30% by mass. Further, the content of the alkyl (meth) acrylate having 1 to 4 carbon atoms of the alkyl group in the monomer component is comprehensively excellent in water permeability resistance, blocking resistance, impregnation adhesion resistance, bending resistance and moisture permeability. From the viewpoint of forming a coating film, it is preferably 5% by mass or less, more preferably 3% by mass or less, and further preferably 1% by mass or less.

Examples of the hydroxyl group-containing (meth) acrylate include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, and 4-hydroxy. Examples thereof include hydroxyl group-containing (meth) acrylates having 1 to 18 carbon atoms in the ester group such as butyl (meth) acrylate, but the present invention is not limited to these examples. These monomers may be used alone or in combination of two or more.

The content of hydroxyl group-containing (meth) acrylate in all monomer components used as a raw material for emulsion particles is a coating that is comprehensively excellent in water permeability, blocking resistance, impregnation adhesion, bending resistance, and moisture permeability. From the viewpoint of forming a film, it is preferably 0 to 5% by mass, more preferably 0 to 3% by mass.

Examples of the carboxyl group-containing monomer include carboxyl group-containing aliphatic monomers such as (meth) acrylic acid, maleic acid, fumaric acid, crotonic acid, itaconic acid, and maleic anhydride. The invention is not limited to such embodiments. These monomers may be used alone or in combination of two or more. Among these carboxyl group-containing monomers, acrylic acid, methacrylic acid, and the like, from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance, and moisture permeability. Itaconic acid is preferred, acrylic acid and methacrylic acid are more preferred.

The content of the carboxyl group-containing monomer in all the monomer components used as the raw material of the emulsion particles is a coating that is comprehensively excellent in water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. From the viewpoint of forming a film, it is preferably 0.1 to 10% by mass, more preferably 0.3 to 5% by mass.

Examples of the aromatic monomer include styrene-based monomers such as styrene, α-methylstyrene, p-methylstyrene, tert-methylstyrene, chlorostyrene and vinyltoluene, and aralkyl (meth) acrylate. However, the present invention is not limited to such an example. Examples of the aralkyl (meth) acrylate include benzyl (meth) acrylate, phenylethyl (meth) acrylate, methylbenzyl (meth) acrylate, and naphthylmethyl (meth) acrylate, which have an aralkyl group having 7 to 18 carbon atoms. Examples thereof include (meth) acrylate, but the present invention is not limited to such examples. These aromatic monomers may be used alone or in combination of two or more. Among these aromatic monomers, styrene-based monomers are preferable, and styrene is more preferable, from the viewpoint of forming a coating film having excellent water permeability.

The content of aromatic monomers in all the monomer components used as raw materials for emulsion particles is a coating that is comprehensively excellent in water permeability, blocking resistance, impregnation adhesion, bending resistance, and moisture permeability. From the viewpoint of forming a film, it is preferably 50 to 80% by mass, more preferably 55 to 75% by mass.

Examples of the nitrogen atom-containing monomer include (meth) acrylamide, diacetone (meth) acrylamide, N-monomethyl (meth) acrylamide, N-monoethyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide, and N. -N-propyl (meth) acrylamide, N-isopropyl (meth) acrylamide, methylenebis (meth) acrylamide, N-methylol (meth) acrylamide, N-butoxymethyl (meth) acrylamide, dimethylaminoethyl (meth) acrylamide, N, (Meta) acrylamide compounds such as N-dimethylaminopropyl (meth) acrylamide and diacetone (meth) acrylamide, nitrogen atom-containing (meth) acrylate compounds such as dimethylaminoethyl (meth) acrylate and diethylaminoethyl (meth) acrylate, N- Vinyl pyrrolidone, (meth) acrylamide, and the like can be mentioned, but the present invention is not limited to these examples. These nitrogen atom-containing monomers may be used alone or in combination of two or more. Among these nitrogen atom-containing monomers, the (meth) acrylamide compound and the (meth) acrylamide compound from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. (Meta) acrylonitrile is preferred, (meth) acrylamide, diacetone (meth) acrylamide and acrylonitrile are more preferred, and diacetone acrylamide and acrylonitrile are even more preferred.

The content of the nitrogen atom-containing monomer in all the monomer components used as the raw material of the emulsion particles is a coating that is comprehensively excellent in water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. From the viewpoint of forming a film, it is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, still more preferably 0.5% by mass or more, and has water permeability resistance, blocking resistance, impregnation adhesion, and the like. From the viewpoint of forming a coating film having overall excellent bending resistance and moisture permeability, it is preferably 10% by mass or less, more preferably 8% by mass or less, and further preferably 5% by mass or less.

Examples of the acetoxy group-containing monomer include the formula (I) :.

(In the formula, R ¹ is an alkyl group having 1 to 6 carbon atoms, and X ¹ and X ³ are independently represented by an oxygen atom or a sulfur atom or a group represented by the ^{formula: −N (R 2 ) − (R 2} is (Hydrogen atom or alkyl group having 1 to 6 carbon atoms), p is 0 or 1, X ² is an alkylene group having 1 to 12 carbon atoms or a cycloalkylene group having 3 to 12 carbon atoms, and Y is a substituent. Indicates a good vinyl group-containing group)
Examples thereof include acetoxy group-containing monomers represented by, but the present invention is not limited to these examples. When p is 0, X ² and Y are directly bonded.

R ¹ has an alkyl group having 1 to 6 carbon atoms, preferably 1 to 3 carbon atoms, from the viewpoint of forming a coating film having overall excellent water permeability, blocking resistance, impregnation adhesion and bending resistance. It is an alkyl group.

X ¹ and X ³ are independently oxygen atoms, sulfur atoms or formulas: -N from the viewpoint of forming a coating film having excellent water permeability, blocking resistance, impregnation adhesion and bending resistance. It is a group represented by (R ^{2 ) − (R 2} is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms), and p is 0 or 1. When p is 0, X ² and Y are directly bonded.

X ² is an alkylene group having 1 to 12 carbon atoms or a cycloalkylene having 3 to 12 carbon atoms from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion and bending resistance. A group, preferably an alkylene group having 1 to 8 carbon atoms, and more preferably an alkylene group having 1 to 4 carbon atoms.

Y is a vinyl group-containing group which may have a substituent from the viewpoint of forming a coating film having comprehensively excellent water permeability resistance, blocking resistance, impregnation adhesion resistance and bending resistance. Examples of the vinyl group-containing group which may have a substituent include the formula (II) :.

(In the formula, R ³ is a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon ^{atoms or an alkylthio group having 1 to 6 carbon atoms, R 4} is a hydrogen atom or a halogen atom, and q is 0 or 1).
Examples thereof include, but the present invention is not limited to such examples.

R ³ is a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms or an alkylthio group having 1 to 6 carbon atoms. R ⁴ is a hydrogen atom or a halogen atom. Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, an iodine atom and the like, but the present invention is not limited to these examples. In equation (II), when q is 0, the −C (R ³ ) group and (X ³ ) _p − are directly bonded.

Among the acetoxy group-containing monomers represented by the formula (I), the formula (III):

(In the formula, R ⁵ is a hydrogen atom or a methyl group, and r is an integer of 1 to 4)
The acetoxy group-containing monomer represented by the acetoxy group-containing monomer represented by is preferable.

Specific examples of the acetoacetoxy group-containing monomer include acetoacetoxymethyl (meth) acrylate, acetoacetoxyethyl (meth) acrylate, acetoacetoxypropyl (meth) acrylate, acetoacetoxybutyl (meth) acrylate, and allylacetacetate. , Acetacetamide ethyl (meth) acrylate, acetoxyacetic acid vinyl ether and the like, but the present invention is not limited to these examples. These monomers may be used alone or in combination of two or more.

Among the acetoacetoxy group-containing monomers, acetoacetoxymethyl (meth) acrylate and acetoacetoxy are used from the viewpoint of forming a coating film having overall excellent water permeability, blocking resistance, impregnation adhesion and bending resistance. Ethyl (meth) acrylate and allyl acetoacetate are preferred, and acetoacetoxyethyl (meth) acrylate and allyl acetoacetate are more preferred.

The content of the acetacetoxy group-containing monomer in all the monomer components used as the raw material of the emulsion particles is comprehensively excellent in water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. From the viewpoint of forming a coating film, it is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, still more preferably 0.5% by mass or more, and has water permeability resistance, blocking resistance, and impregnation adhesion. From the viewpoint of forming a coating film having overall excellent bending resistance and moisture permeability, it is preferably 10% by mass or less, more preferably 8% by mass or less, and further preferably 5% by mass or less.

In the present invention, from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability, an acetoxy group-containing monomer and a nitrogen atom-containing single amount It is preferable to use it together with the body. As described above, when the acetoxy group-containing monomer and the nitrogen atom-containing monomer are used in combination, an excellent effect of improving the bending resistance is exhibited due to the synergistic effect of the combined use of both.

The mass ratio of the acetoacetoxy group-containing monomer to the nitrogen atom-containing monomer (acetacetoxy group-containing monomer / nitrogen atom-containing monomer) is preferable from the viewpoint of improving the bending resistance of the coating film. It is 10/90 or more, more preferably 15/85 or more, further preferably 20/80 or more, still more preferably 25/75 or more, and preferably 90/10 or less from the viewpoint of improving the bending resistance of the coating film. , More preferably 85/15 or less, still more preferably 80/20 or less.

The total content of the acetacetoxy group-containing monomer and the nitrogen atom-containing monomer in all the monomer components used as the raw materials of the emulsion particles is water permeability resistance, blocking resistance, impregnation adhesion resistance, and bending resistance. From the viewpoint of forming a coating film having overall excellent properties and moisture permeability, it is preferably 0.2% by mass or more, more preferably 0.6% by mass or more, still more preferably 1% by mass or more, and has water permeability resistance. From the viewpoint of forming a coating film having overall excellent blocking resistance, impregnation adhesion, bending resistance and moisture permeability, it is preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably 10% by mass. It is as follows.

Examples of the oxo group-containing monomer include (di) ethylene glycol (methoxy) (meth) such as ethylene glycol (meth) acrylate, ethylene glycol methoxy (meth) acrylate, diethylene glycol (meth) acrylate, and diethylene glycol methoxy (meth) acrylate. ) Acrylate and the like, but the present invention is not limited to such examples. These monomers may be used alone or in combination of two or more.

The content of the oxo group-containing monomer in all the monomer components used as the raw material of the emulsion particles is a coating that is comprehensively excellent in water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. From the viewpoint of forming a film, it is preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass.

Examples of the fluorine atom-containing monomer include a fluorine atom-containing alkyl having 2 to 6 carbon atoms in an ester group such as trifluoroethyl (meth) acrylate, tetrafluoropropyl (meth) acrylate, and octafluoropentyl (meth) acrylate. Examples thereof include (meth) acrylate, but the present invention is not limited to such examples. These monomers may be used alone or in combination of two or more.

The content of the fluorine atom-containing monomer in all the monomer components used as the raw material of the emulsion particles is a coating that is comprehensively excellent in water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. From the viewpoint of forming a film, it is preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass.

Examples of the epoxy group-containing monomer include epoxy group-containing (meth) acrylates such as glycidyl (meth) acrylate, but the present invention is not limited to these examples.

The content of the epoxy group-containing monomer in all the monomer components used as the raw material of the emulsion particles is a coating that is comprehensively excellent in water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. From the viewpoint of forming a film, it is preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass.

Examples of the ultraviolet-absorbing monomer include benzotriazole-based ultraviolet-absorbing monomers and benzophenone-based ultraviolet-absorbing monomers, but the present invention is not limited to these examples. These monomers may be used alone or in combination of two or more.

Examples of the benzotriazole-based ultraviolet absorbing monomer include 2- [2'-hydroxy-5'-(meth) acryloyloxymethylphenyl] -2H-benzotriazole and 2- [2'-hydroxy-5'-. (Meta) acryloyloxyethylphenyl] -2H-benzotriazole, 2- [2'-hydroxy-5'-(meth) acryloyloxymethylphenyl] -5-tert-butyl-2H-benzotriazole, 2- [2' -Hydroxy-5'-(meth) acryloylaminomethyl-5'-tert-octylphenyl] -2H-benzotriazole, 2- [2'-hydroxy-5'-(meth) acryloyloxypropylphenyl] -2H-benzo Triazole, 2- [2'-hydroxy-5'-(meth) acryloyloxyhexylphenyl] -2H-benzotriazole, 2- [2'-hydroxy-3'-tert-butyl-5'-(meth) acryloyloxy Ethylphenyl] -2H-benzotriazole, 2- [2'-hydroxy-3'-tert-butyl-5'-(meth) acryloyloxyethylphenyl] -5-chloro-2H-benzotriazole, 2- [2' -Hydroxy-5'-tert-butyl-3'-(meth) acryloyloxyethylphenyl] -2H-benzotriazole, 2- [2'-hydroxy-5'-(meth) acryloyloxyethylphenyl] -5-chloro -2H-benzotriazole, 2- [2'-hydroxy-5'-(meth) acryloyloxyethylphenyl] -5-cyano-2H-benzotriazole, 2- [2'-hydroxy-5'-(meth) acryloyl Oxyethylphenyl] -5-tert-butyl-2H-benzotriazole, 2- [2'-hydroxy-5'-(β- (meth) acryloyloxyethoxy) -3'-tert-butylphenyl] -4-tert Examples thereof include -butyl-2H-benzotriazole, but the present invention is not limited to such examples. These benzotriazole-based ultraviolet absorbing monomers may be used alone or in combination of two or more.

Examples of the benzophenone-based ultraviolet absorbing monomer include 2-hydroxy-4- (meth) acryloyloxybenzophenone, 2-hydroxy-4- [2-hydroxy-3- (meth) acryloyloxy] propoxybenzophenone, 2-. Hydroxy-4- [2- (meth) acryloyloxy] ethoxybenzophenone, 2-hydroxy-4- [3- (meth) acryloyloxy-2-hydroxypropoxy] benzophenone, 2-hydroxy-3-tert-butyl-4- [2- (Meta) acryloyloxy] butoxybenzophenone and the like can be mentioned, but the present invention is not limited to such examples. These benzophenone-based ultraviolet absorbing monomers may be used alone or in combination of two or more.

The content of the UV-absorbing monomer in all the monomer components used as the raw material of the emulsion particles is a coating that is comprehensively excellent in water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. From the viewpoint of forming a film, it is preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass.

Examples of the ultraviolet stable monomer include 4- (meth) acryloyloxy-2,2,6,6-tetramethylpiperidine and 4- (meth) acryloylamino-2,2,6,6-tetramethylpiperidine. , 4- (Meta) acryloyloxy-1,2,2,6,6-pentamethylpiperidin, 4- (meth) acryloyl-1-methoxy-2,2,6,6-tetramethylpiperidine, 4-cyano- 4- (Meta) acryloyloxy-2,2,6,6-tetramethylpiperidine, 1- (meth) acryloyl-4- (meth) acryloylamino-2,2,6,6-tetramethylpiperidine, 4-croto Noylamino-2,2,6,6-tetramethylpiperidine, 4- (meth) acryloylamino-1,2,2,6,6-pentamethylpiperidine, 4-cyano-4- (meth) acryloylamino-2 , 2,6,6-tetramethylpiperidine, 4-crotonoyloxy-2,2,6,6-tetramethylpiperidine, 1- (meth) acryloyl-4-cyano-4- (meth) acryloylamino-2, Examples thereof include 2,6,6-tetramethylpiperidine, 1-crotonoyl-4-crotonoyloxy-2,2,6,6-tetramethylpiperidine, but the present invention is not limited to these examples. do not have. These ultraviolet-stable monomers may be used alone or in combination of two or more.

The content of the UV-stable monomer in all the monomer components used as the raw material of the emulsion particles is a coating that is comprehensively excellent in water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. From the viewpoint of forming a film, it is preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass.

The monomer component used in the present invention is an alkyl (meth) acrylate or a hydroxyl group from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. It is preferable to contain at least one selected from the group consisting of a (meth) acrylate, a carboxyl group-containing monomer, an aromatic monomer, a nitrogen atom-containing monomer and an acetoacetoxy group-containing monomer. ..

As a method of emulsion polymerization of the monomer component, for example, an emulsifier is dissolved in an aqueous medium containing water and a water-soluble organic solvent such as a lower alcohol such as methanol and a medium such as water, and a single amount is obtained under heating and stirring. Examples thereof include a method of dropping a body component and a polymerization initiator, a method of dropping a monomer component pre-emulsified with an emulsifier and water onto water or an aqueous medium, and the like. It is not limited. The amount of the medium may be appropriately set in consideration of the non-volatile content contained in the obtained resin emulsion.

In the present invention, when the monomer component is emulsion-polymerized, a polyoxyalkylene alkyl ether having an addition molar number of 2 to 80 oxyalkylene groups can be present.

It can be adjusted by forming emulsion particles and emulsion-polymerizing the monomer component. In the present invention, the monomer component can be emulsion-polymerized in the presence of the polyoxyalkylene alkyl ether, and the monomer component can be obtained after emulsion polymerization in the absence of the polyoxyalkylene alkyl ether. Polyoxyalkylene alkyl ether can be added to the resin emulsion. In the present invention, in any of these embodiments, it is possible to form a coating film having comprehensively excellent water permeability resistance, blocking resistance, impregnation adhesion resistance, bending resistance and moisture permeability. Among these aspects, emulsion polymerization of the monomer component in the presence of polyoxyalkylene alkyl ethers comprehensively further results in water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. It is preferable from the viewpoint of forming an excellent coating film.

Generally, in order to improve the blocking resistance of the coating film, it is considered to increase the content of the inorganic filler in the aqueous resin composition for a sealer. However, when the content of the inorganic filler in the water-based resin composition for a sealer is increased, it is considered that the water permeability, impregnation adhesion, bending resistance and moisture permeability of the coating film are lowered.

On the other hand, in the present invention, since the polyoxyalkylene alkyl ether and the inorganic filler containing 80 to 100% by mass of carbonate are used in combination, the moisture permeability is excellent and the water permeability is also excellent. It is possible to form a coating film having excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability.

As a typical example of a polyoxyalkylene alkyl ether having an addition molar number of 2 to 80 oxyalkylene groups, the addition molar number of the oxyalkylene group is 2 to 4 and the addition molar number of the oxyalkylene group is 2 to 80. , Polyoxyalkylene alkyl ether having an alkyl group having 1 to 18 carbon atoms and the like.

Suitable polyoxyalkylene alkyl ethers include, for example, formula (IV) :.

(In the formula, R ⁶ is an alkyl group ^{having 1 to 18 carbon atoms, R 7} is a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, R ⁸ is an alkylene group having 2 to 4 carbon atoms, and s is an integer of 2 to 80 carbon atoms. Show)
Examples thereof include polyoxyalkylene alkyl ethers represented by, but the present invention is not limited to these examples.

In formula (IV), R ⁶ is an alkyl group having 1 to 18 carbon atoms. R ⁶ is an alkyl group having 1 to 18 carbon atoms, preferably 2 carbon atoms, from the viewpoint of forming a coating film having overall excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. It is an alkyl group of ~ 13, more preferably an alkyl group having 3 to 8 carbon atoms.

In formula (IV), R ⁷ is a hydrogen atom or an alkyl group having 1 to 12 carbon atoms. R ⁷ is a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, preferably an alkyl group having 1 to 18 carbon atoms, from the viewpoint of forming a coating film having overall excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. It is a hydrogen atom or an alkyl group having 2 to 13 carbon atoms, more preferably a hydrogen atom or an alkyl group having 3 to 8 carbon atoms.

In formula (IV), R ⁸ is an alkylene group having 2 to 4 carbon atoms. R ⁸ has an alkylene group having 2 to 4 carbon atoms, preferably an alkylene group having 2 to 4 carbon atoms, from the viewpoint of forming a coating film having overall excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. It is 2 or 3 alkylene groups.

In formula (IV), s represents the number of moles of oxyalkylene group added and is an integer of 2-80. s is 2 or more, preferably 3 or more, more preferably 5 or more, and further, from the viewpoint of forming a coating film having overall excellent water permeability, blocking resistance, impregnation adhesion, bending resistance, and moisture permeability. It is preferably 10 or more, and is 80 or less, preferably 70 or less, more preferably 70 or less, from the viewpoint of forming a coating film having overall excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. It is 60 or less, more preferably 50 or less.

The oxyalkylene group contained in the polyoxyalkylene alkyl ether has 2 to 4 carbon atoms from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. It is an oxyalkylene group, and an oxyalkylene group having 2 or 3 carbon atoms is preferable. Examples of the oxyalkylene group include an oxyethylene group, an oxypropylene group, an oxybutylene group and the like, but the present invention is not limited to these examples. Among these oxyalkylene groups, an oxyethylene group and an oxypropylene group are preferable, and an oxyethylene group is more preferable.

The HLB (hydrophilic lipophilic balance) of the polyoxyalkylene alkyl ether is preferably 5 from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. It is ~ 25, more preferably 7-19, and even more preferably 10-19.

Polyoxyalkylene alkyl ethers are readily available commercially. Examples thereof are manufactured by Nippon Catalyst Co., Ltd., trade names: Softanol (registered trademark) 30, Softanol (registered trademark) 150, Softanol (registered trademark) 400, Softanol (registered trademark) 500, Kao Co., Ltd., Commodity. Names: Emargen® 1108, Emargen® 1118S-70, Emargen® 1350S-70, Emargen® 1150S-60, Emargen® 306, Emargen® 320, Emargen (registered trademark) 350, Emargen (registered trademark) 103, Emargen (registered trademark) 105, Emargen (registered trademark) 120, Emargen (registered trademark) 150, etc., but the present invention is limited to such examples. It's not a thing. These polyoxyalkylene alkyl ethers may be used alone or in combination of two or more.

The amount of polyoxyalkylene alkyl ether per 100 parts by mass of the monomer component is from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. It is preferably 0.1 part by mass or more, more preferably 0.3 part by mass or more, still more preferably 0.5 part by mass or more, and has water permeability resistance, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. From the viewpoint of forming an overall excellent coating film, it is preferably 10 parts by mass or less, more preferably 8 parts by mass or less, and further preferably 5 parts by mass or less.

In the present invention, the monomer component may be emulsion-polymerized in the presence of the polyoxyalkylene alkyl ether, or the monomer component may be emulsion-polymerized in the presence of the polyoxyalkylene alkyl ether and another emulsifier. Alternatively, the monomer component may be emulsion-polymerized in the presence of the other emulsifier, and the polyoxyalkylene alkyl ether may be added to the obtained resin emulsion. Among these aspects, a single amount in the presence of a polyoxyalkylene alkyl ether from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. It is preferred to emulsion-polymerize the body components or to emulsion-polymerize the monomeric components in the presence of polyoxyalkylene alkyl ethers and other emulsifiers.

Examples of emulsifiers other than polyoxyalkylene alkyl ether include anionic emulsifiers, nonionic emulsifiers, cationic emulsifiers, amphoteric emulsifiers, and polymer emulsifiers, and these emulsifiers may be used alone. Two or more types may be used in combination.

Examples of the anionic emulsifier include alkyl sulfate salts such as ammonium dodecyl sulfate and sodium dodecyl sulfate; alkyl sulfonate salts such as ammonium dodecyl sulfonate and sodium dodecyl sulfonate; alkylaryl sulfonate salts such as ammonium dodecylbenzene sulfonate and sodium dodecyl naphthalene sulfonate; Examples thereof include polyoxyethylene alkyl sulfate salts; polyoxyethylene alkyl aryl sulfate salts; dialkyl sulfosuccinates; aryl sulfonic acid-formalin condensates; fatty acid salts such as ammonium laurylate and sodium stearylate. It is not limited to illustrations only.

Examples of the nonionic emulsifier include polyoxyethylene alkylaryl ether, condensate of polyethylene glycol and polypropylene glycol, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, fatty acid monoglyceride, and condensate of ethylene oxide and aliphatic amine. However, the present invention is not limited to such an example.

Examples of the cationic emulsifier include alkylammonium salts such as dodecylammonium chloride, but the present invention is not limited to these examples.

Examples of the amphoteric emulsifier include betaine ester type emulsifiers, but the present invention is not limited to these examples.

Examples of the polymer emulsifier include poly (meth) acrylates such as sodium polyacrylate; polyvinyl alcohol; polyvinylpyrrolidone; and polyhydroxyalkyl (meth) acrylates such as polyhydroxyethyl acrylate; Examples thereof include polymers containing one or more types of monomers as copolymerization components, but the present invention is not limited to these examples.

Further, as the emulsifier, an emulsifier having a reactive group, that is, a so-called reactive emulsifier is preferable from the viewpoint of improving the mechanical stability of the emulsion particles when the emulsion particles and the inorganic filler are mixed, and it protects the environment. From the viewpoint, a non-nonylphenyl type emulsifier is preferable.

Examples of the reactive emulsifier include propenyl-alkylsulfosuccinate salt, (meth) acrylate polyoxyethylene sulfonate salt, and (meth) acrylate polyoxyethylene phosphonate salt [for example, manufactured by Sanyo Kasei Kogyo Co., Ltd., Product name: Eleminor RS-30, etc.], Polyoxyethylene alkylpropenylphenyl ether ammonium sulfate [for example, manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Product name: Aqualon HS-10, Aqualon BC-10, etc.], Allyloxymethylalkyloxy Alkoxyethylene sulfonate salt [for example, manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10, etc.], allyloxymethylnonylphenoxyethyl hydroxypolyoxyethylene sulfonate salt [for example, manufactured by ADEKA Co., Ltd., Product name: Adecaria soap SE-10, etc.], Allyloxymethylalkoxyethyl hydroxypolyoxyethylene sulfate ester salt [For example, manufactured by ADEKA Co., Ltd., Product name: Adecaria soap SR-10, SR-30, etc.], Bis (Polyoxyethylene polycyclic phenyl ether) methacrylated sulfonate salt [for example, manufactured by Nippon Emulsifier Co., Ltd., trade name: Antox MS-60, etc.], allyloxymethylalkoxyethyl hydroxypolyoxyethylene [for example, ADEKA Co., Ltd.] , Product name: Adecaria soap ER-20, etc.], Polyoxyethylene alkylpropenylphenyl ether [For example, manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Product name: Aqualon RN-20, etc.], Allyloxymethylnonylphenoxyethyl hydroxy Examples thereof include polyoxyethylene [for example, manufactured by ADEKA Co., Ltd., trade name: Adecaria Soap NE-10, etc.], but the present invention is not limited to such examples.

When the other emulsifier is used, per 100 parts by mass of the monomer component from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. It is preferable to adjust so that the total amount of the emulsifier in the above does not exceed 10 parts by mass.

Examples of the polymerization initiator include azobisisobutyronitrile, 2,2-azobis (2-methylbutyronitrile), 2,2-azobis (2,4-dimethylvaleronitrile), and 2,2-azobis (2,2-azobis). 2-Diaminopropane) Hydrochloride, azo compounds such as 4,4-azobis (4-cyanovaleric acid), 2,2-azobis (2-methylpropionamidine); persulfates such as potassium persulfate and ammonium persulfate; Examples thereof include peroxides such as hydrogen peroxide, benzoyl peroxide, parachlorobenzoyl peroxide, lauroyl peroxide, and ammonium peroxide, but the present invention is not limited to these examples. These polymerization initiators may be used alone or in combination of two or more.

The amount of the polymerization initiator per 100 parts by mass of the monomer component is preferably 0.01 part by mass or more, more preferably 0, from the viewpoint of increasing the polymerization rate and reducing the residual amount of the unreacted monomer component. It is .03 parts by mass or more, and is preferably 1 part by mass or less, more preferably 0.5 parts by mass or less, from the viewpoint of improving the water permeability of the formed coating film.

The method of adding the polymerization initiator is not particularly limited. Examples of the addition method include batch preparation, split preparation, continuous dropping and the like. Further, from the viewpoint of accelerating the end time of the polymerization reaction, a part of the polymerization initiator may be added into the flask before or after the completion of adding the monomer component into the reaction system.

In order to promote the decomposition of the polymerization initiator, for example, a reducing agent such as sodium bisulfite and a decomposition agent of the polymerization initiator such as a transition metal salt such as ferrous sulfate are added in an appropriate amount into the reaction system. May be good. Further, if necessary, an appropriate amount of a chain transfer agent such as a compound having a thiol group such as tert-dodecyl mercaptan, a pH buffer, a chelating agent, a film-forming aid and the like is added to the reaction system. May be added with.

The atmosphere when the monomer component is emulsion-polymerized is not particularly limited, but is preferably an inert gas such as nitrogen gas from the viewpoint of increasing the efficiency of the polymerization initiator.

The polymerization temperature at the time of emulsion polymerization of the monomer component is not particularly limited, but is usually preferably 50 to 100 ° C, more preferably 60 to 95 ° C. The polymerization temperature may be constant or may be changed during the polymerization reaction.

The polymerization time for emulsion polymerization of the monomer component is not particularly limited and may be appropriately set according to the progress of the polymerization reaction, but is usually about 2 to 9 hours.

By emulsion polymerization of the monomer component as described above, a resin emulsion containing emulsion particles can be obtained.

The emulsion particles contained in the resin emulsion may be composed of only one type of resin layer prepared by one-stage emulsion polymerization, and a plurality of resin layers prepared by multi-stage emulsion polymerization of monomer components. It may be composed of. Among these, it is preferable that the emulsion particles contained in the resin emulsion are composed of a plurality of resin layers from the viewpoint of achieving both the hardness of the coating film and the contradictory properties of the film-forming property.

When the emulsion particles have a plurality of resin layers, the number of resin layers constituting the emulsion particles is not particularly limited, but is comprehensively excellent in water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. From the viewpoint of forming a solid coating film, it is preferably 1 to 5 layers, more preferably 1 to 3 layers, still more preferably 2 or 3 layers, and even more preferably 3 layers. The emulsion particles have a three-layer structure of an inner layer, an intermediate layer and an outer layer from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. Of the monomer component used as a raw material for the intermediate layer and the monomer component used as a raw material for the outer layer, it is preferable that at least one of the monomer components contains an acetoxy group-containing monomer. .. Therefore, the acetoxy group-containing monomer may be contained only in the monomer component used as the raw material of the intermediate layer, and the acetoxy group-containing single amount may be contained only in the monomer component used as the raw material of the outer layer. The body may be contained, and the acetoxy group-containing monomer may be contained in both the monomer components used as the raw materials of the intermediate layer and the outer layer. In this case, the monomer component used as the raw material of the inner layer may not contain the acetoxy group-containing monomer. As the monomer component used for the polymer constituting the inner layer, the intermediate layer and the outer layer, for example, the same monomer component as the above-mentioned monomer component can be exemplified. The method and polymerization conditions for emulsion polymerization of the monomer components constituting the inner layer, the intermediate layer and the outer layer may be the same as the method and polymerization conditions for emulsion polymerization of the monomer components. Further, a resin layer made of another polymer is formed between the inner layer and the intermediate layer, between the intermediate layer and the outer layer, or on the surface of the outer layer, if necessary, within a range that does not hinder the object of the present invention. It may have been done.

The polymer constituting the emulsion particles may have a crosslinked structure. The weight average molecular weight of the polymer is preferably 100,000 or more, more preferably 300,000 or more, still more preferably 550,000 or more, and particularly preferably 600,000 or more, from the viewpoint of improving the water permeability of the coating film. The upper limit of the weight average molecular weight of the polymer is not particularly limited because it is difficult to measure the weight average molecular weight when it has a crosslinked structure, but when it does not have a crosslinked structure, the film-forming property is improved. From the viewpoint, it is preferably 5 million or less.

In this specification, the weight average molecular weight of the polymer is gel permeation chromatography [manufactured by Toso Co., Ltd., product number: HLC-8120GPC, column: TSKgel G-5000HXL and TSKgel GMHXL-L are used in series. ] Means the weight average molecular weight (in terms of polystyrene) measured using.

The glass transition temperature of the entire emulsion particles is preferably 0 ° C. or higher, more preferably 0 ° C. or higher, from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. It is 5 ° C. or higher, more preferably 10 ° C. or higher, and preferably 70 ° C. or lower from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. , More preferably 60 ° C. or lower, still more preferably 55 ° C. or lower.

In the present specification, the glass transition temperature of the polymer is the glass transition temperature of the homopolymer of the monomer used as the monomer component constituting the polymer, and the formula (V):
1 / Tg = Σ (Wm / Tgm) / 100 (V)
[In the formula, Wm indicates the content (% by mass) of the monomer m in the monomer component constituting the polymer, and Tgm indicates the glass transition temperature (absolute temperature: K) of the homopolymer of the monomer m. ]
It means the temperature obtained based on the Fox formula represented by.

In the present specification, the glass transition temperature of the polymer constituting the emulsion particles means the glass transition temperature obtained based on the formula (V) unless otherwise specified. For example, the glass transition temperature of the entire polymer constituting the emulsion particles having a plurality of resin layers corresponds to the mass fraction of each monomer in all the monomer components used in the multi-stage emulsion polymerization. It means the glass transition temperature obtained from the glass transition temperature of the homopolymer of the monomer. For monomers such as special monomers and polyfunctional monomers whose glass transition temperature is unknown, the total amount of the monomers whose glass transition temperature is unknown in the monomer component is the mass fraction. When it is 10% by mass or less, the glass transition temperature can be obtained by using only the monomer whose glass transition temperature is known. When the total amount of monomers whose glass transition temperature is unknown in the monomer component exceeds 10% by mass in terms of mass, the glass transition temperature of the polymer is determined by differential scanning calorimetry (DSC) or differential calorimetry. Obtained by (DTA), thermomechanical analysis (TMA), etc.

The glass transition temperature of the polymer can be easily adjusted by adjusting the composition of the monomer component. The composition of the monomer component used as a raw material of the polymer constituting the emulsion particles can be determined in consideration of the glass transition temperature of the polymer constituting the emulsion particles.

The glass transition temperature of the polymer is, for example, 100 ° C. for a styrene homopolymer, -70 ° C. for a 2-ethylhexyl acrylate homopolymer, 95 ° C. for an acrylic acid homopolymer, and a single weight of 2-hydroxyethyl methacrylate. 55 ° C for coalescence, 96 ° C for acrylonitrile homopolymer, 18 ° C for acetoacetoxyethyl methacrylate homopolymer, 77 ° C for diacetoneacrylamide homopolymer, 165 ° C for acrylamide homopolymer, allylacetoacetate The temperature of the homopolymer of is 28.3 ° C.

When the emulsion particles are composed of a plurality of resin layers, the solubility parameter of the polymer constituting the outer layer (hereinafter, also referred to as SP value) is higher than the SP value of the polymer constituting the inner layer. A high value is preferable from the viewpoint of improving the flexibility and film-forming property of the coating film. Further, the difference (absolute value) between the SP value of the polymer using the monomer component as a raw material and the SP value of the polymer constituting the outer layer is large from the viewpoint of forming a layer-separated structure in the emulsion particles. Is preferable.

The SP value is a value defined by the regular solution theory introduced by Hildebrand, and is also a measure of the solubility of a two-component solution. In general, substances having similar SP values tend to be easily mixed with each other. Therefore, the SP value is also a guide for determining the ease of mixing the solute and the solvent.

When the emulsion particles have a two-layer structure, the mass ratio of the polymer constituting the inner layer to the polymer constituting the outer layer (polymer constituting the inner layer / polymer constituting the outer layer) Is preferably 20/80 or more, more preferably 30/70 or more, from the viewpoint of forming a coating film having overall excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. From the viewpoint of forming a coating film having overall excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability, it is preferably 60/40 or less, more preferably 50/50 or less.

Further, when the emulsion particles have a three-layer structure, the inner layer of the emulsion particles is formed from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. The content of the polymer is preferably 10% by mass or more, more preferably 20% by mass or more, and the content of the polymer constituting the intermediate layer in the emulsion particles is preferably 20% by mass or more. More preferably, it is 30% by mass or more, and the content of the polymer constituting the outer layer in the emulsion particles is preferably 10% by mass or more, more preferably 20% by mass or more, and has water permeability resistance and blocking resistance. From the viewpoint of forming a coating film having overall excellent impregnation adhesion, bending resistance and moisture permeability, the content of the polymer constituting the inner layer in the emulsion particles is preferably 50% by mass or less, more preferably 40. The content of the polymer constituting the intermediate layer in the emulsion particles is preferably 60% by mass or less, more preferably 50% by mass or less, and the polymer constituting the outer layer in the emulsion particles. The content of the particles is preferably 50% by mass or less, more preferably 40% by mass or less.

The average particle size of the emulsion particles is preferably 50 nm or more, more preferably 100 nm or more from the viewpoint of improving the mechanical stability of the emulsion particles themselves, and preferably 300 nm or less from the viewpoint of improving the water resistance of the coating film. , More preferably 200 nm or less.

In the present specification, the average particle size of the emulsion particles is measured using a particle size distribution measuring device [Particle Sizing Systems, trade name: NICOMP Model 380] by a dynamic light scattering method. It means the volume average particle size obtained.

The non-volatile content in the resin emulsion is preferably 30% by mass or more, more preferably 35% by mass or more from the viewpoint of improving productivity, and preferably 70% by mass or less, more preferably from the viewpoint of improving handleability. It is 60% by mass or less.

For the non-volatile content in the resin emulsion, 1 g of the resin emulsion was weighed and dried in a hot air dryer at a temperature of 110 ° C. for 1 hour, and the obtained residue was used as the non-volatile content.
[Non-volatile content in resin emulsion (mass%)]
= ([Mass of residue] ÷ [Resin emulsion 1 g]) × 100 (VI)
Means the value obtained based on.

The minimum film-forming temperature of the resin emulsion is preferably 10 to 80 ° C. from the viewpoint of improving the film-forming property. The minimum film-forming temperature of the resin emulsion of the present invention can be adjusted, for example, by adjusting the glass transition temperature of the entire emulsion particle or the glass transition temperature of the outermost layer.

In the present specification, the minimum film forming temperature of the resin emulsion is such that the resin emulsion is coated on a glass plate placed on a thermal gradient tester with an applicator so as to have a thickness of 0.2 mm, and cracks are generated. It means the temperature when it occurs.

The aqueous resin composition for a sealer of the present invention contains an inorganic filler. In the present invention, the content of the inorganic filler in the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether having 2 to 80 additional moles of the oxyalkylene group, and the inorganic filler is 50 to 85% by mass. One is that carbonate is contained in the inorganic filler at a content of 80 to 100% by mass, and the monomer component used as a raw material for the emulsion particles contains an acetoacetoxy group-containing monomer. It has a big feature.

Generally, in order to improve the blocking resistance of the coating film, it is considered to increase the content of the inorganic filler in the aqueous resin composition for a sealer. However, when the content of the inorganic filler in the water-based resin composition for a sealer is increased, the blocking resistance is improved, but the water permeability, impregnation adhesion, bending resistance and moisture permeability of the formed coating film are improved. Will decrease.

On the other hand, in the aqueous resin composition for a sealer of the present invention, the inorganic filler in the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether having 2 to 80 additional moles of the oxyalkylene group, and the inorganic filler. The content is 50 to 85% by mass, and despite the high content of the inorganic filler in the water-based resin composition for sealers, water permeability resistance, blocking resistance, impregnation adhesion resistance, and bending resistance. In addition, it is possible to form a coating film having an overall excellent moisture permeability.

In the present invention, despite the fact that the water-based resin composition for a sealer contains an inorganic filler at a high content, water permeability resistance, blocking resistance, impregnation adhesion resistance, bending resistance and moisture permeability The overall excellent coating film is formed because the inorganic filler contains a carbonate in a content of 80 to 100% by mass and a polyoxyalkylene alkyl ether is used. ..

Examples of carbonates include alkali metal carbonates such as sodium carbonate, sodium hydrogen carbonate, potassium carbonate and potassium hydrogen carbonate; alkaline earth metal carbonates such as magnesium carbonate, calcium carbonate and barium carbonate; ammonium carbonate and ammonium hydrogen carbonate. However, the present invention is not limited to such examples. These carbonates may be used alone or in combination of two or more. Among these carbonates, alkali metal carbonates and alkaline earth metal carbonates are used from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. Salts are preferred, sodium carbonate, sodium hydrogen carbonate and calcium carbonate are more preferred, and calcium carbonate is even more preferred.

The content of carbonate in the inorganic filler is 80% by mass or more, preferably 80% by mass or more, from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. It is 85% by mass or more, more preferably 90% by mass or more, still more preferably 95% by mass or more, and the upper limit thereof is 100% by mass.

Examples of inorganic fillers other than carbonate include zinc oxide particles, aluminum oxide particles, magnesium oxide particles, beryllium oxide particles, calcium oxide particles, zirconium oxide particles, alumina particles, titanium dioxide particles, silica particles, and magnesium hydroxide particles. , Aluminum hydroxide particles, calcium silicate particles, aluminum silicate particles, silicon carbide particles, silicon nitride particles, boron nitride particles, calcium sulfate particles, barium sulfate particles, magnesium carbonate particles, glass particles, kaolin, talc, mica powder, metal particles , Carbon black and the like, but the present invention is not limited to such examples. These may be used alone or in combination of two or more.

Examples of the shape of the inorganic filler include spherical, fibrous, scaly, conical, crushed, planar, and indefinite shapes, but the present invention is not limited to these examples.

The content of the inorganic filler other than the carbonate in the inorganic filler is 20 mass from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. % Or less, preferably 15% by mass or less, more preferably 10% by mass or less, still more preferably 5% by mass or less, and the lower limit is 0% by mass.

The average particle size of the inorganic filler is preferably 0.3 μm or more, more preferably 0.3 μm or more, from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. Is 0.5 μm or more, more preferably 1 μm or more, and preferably 100 μm or less from the viewpoint of forming a coating film having comprehensively excellent water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. , More preferably 80 μm or less, still more preferably 50 μm or less.

The average particle size of the inorganic filler means the volume average particle size measured using a laser diffraction / scattering method particle size distribution measuring device [Beckman Coulter, product number: LS13320].

The content of the polyoxyalkylene alkyl ether having 2 to 80 additional moles of the emulsion particles and the oxyalkylene group and the inorganic filler in the total solid content of the inorganic filler is water permeability resistance, blocking resistance, and impregnation adhesion. From the viewpoint of forming a coating film having overall excellent bending resistance and moisture permeability, it is 50% by mass or more, preferably 55% by mass or more, more preferably 60% by mass or more, and has water permeability resistance and blocking resistance. From the viewpoint of forming a coating film having overall excellent impregnation adhesion, bending resistance and moisture permeability, it is 85% by mass or less, preferably 80% by mass or less, and more preferably 75% by mass or less. Further, the content of the emulsion particles, the polyoxyalkylene alkyl ether having 2 to 80 additional moles of the oxyalkylene group, and the emulsion particles in the total solid content of the inorganic filler is water permeability resistance, blocking resistance, and impregnation adhesion. From the viewpoint of forming a coating film having overall excellent properties, bending resistance and moisture permeability, it is 15% by mass or more, preferably 20% by mass or more, more preferably 25% by mass or more, and has water permeability resistance and blocking resistance. From the viewpoint of forming a coating film having overall excellent properties, impregnation adhesion, bending resistance and moisture permeability, the content is 50% by mass or less, preferably 45% by mass or less, and more preferably 40% by mass or less.

When the polyoxyalkylene alkyl ether is not used in the emulsion polymerization of the monomer component, the aqueous resin composition for a sealer of the present invention is, for example, a resin emulsion containing emulsion particles, an inorganic filler, or the like. It can be easily prepared by mixing a polyoxyalkylene alkyl ether and, if necessary, an additive. The order in which these components are mixed is arbitrary, and for example, these components may be mixed together.

The sealer of the present invention may be composed only of the aqueous resin composition for a sealer of the present invention, and may be prepared by adding an additive to the aqueous resin composition for a sealer, if necessary.

Additives include, for example, dispersants, defoamers, thickeners, rheology control agents, foaming agents, plasticizers, wetting agents, anti-blocking agents, anti-aging agents, preservatives, anti-polymerization agents, anti-static agents, etc. Examples thereof include UV absorbers, UV stabilizers, silane coupling agents, flame retardants, leveling agents, plasticizers, dyes, pigments, antioxidants, etc., but the present invention is not limited to these examples. These additives may be used alone or in combination of two or more. Since the amount of the additive used in the sealer varies depending on the type of the additive, it is preferable to appropriately adjust the amount according to the type of the additive.

The sealer of the present invention obtained as described above exhibits excellent effects of excellent moisture permeability and water permeability, and has water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. Since it is generally excellent, it can be suitably used as an undercoating agent applied to the front surface or the back surface of an inorganic building material.

Inorganic substrates generally have water absorbency in many cases. The aqueous resin composition for a sealer of the present invention can be suitably used for an inorganic base material having water absorption as described above. Examples of the inorganic base material include ceramic-based base materials and metal-based base materials. Ceramic base materials are used, for example, in applications such as roof tiles and outer wall materials. For the ceramic base material, an inorganic filler, a fibrous material, etc. are added to a water-hardening adhesive material which is a raw material of an inorganic cured product, the obtained mixture is molded, and the obtained molded product is cured and cured. Obtained by. Examples of the inorganic base material include flexible board, calcium silicate board, gypsum slag perlite board, wood piece cement board, precast concrete board, ALC board, gypsum board and the like.

In general, an inorganic base material has a property of being easily deteriorated because water easily permeates the inside thereof. Therefore, an undercoating agent called a sealer is applied to the front surface and the back surface of the inorganic base material. .. Further, the surface of the inorganic base material is usually coated with a topcoat paint in order to impart a desired design. Of these, the sealer of the present invention can be suitably used as an undercoating agent.

Examples of the method for applying the sealer of the present invention to an inorganic substrate include a spray coating method, a roll coating method, a brush coating method, a trowel coating method, a bar coating method, a die coating method, a comma coating method, a gravure coating method, and a kiss coating method. , Spin coat method, dip coat method, curtain coat method, doctor blade coat method, knife coat method, air knife coat method, micro gravure coat method, offset gravure coat method, lip coat method, etc. , It is not limited to such an example. Among these methods, the sealer of the present invention can also be suitably used for the roll coating method.

The sealer of the present invention may be coated by itself in one layer, or may be coated by overcoating in two or more layers. When coating by overcoating two or more layers, only a part of the layers may be formed by the sealer of the present invention, or all the layers may be formed by the sealer of the present invention.

The thickness of the coating film after drying, which is formed on the surface of the inorganic substrate and is made of the sealer of the present invention, is not particularly limited, but is usually preferably about 0.5 to 200 μm, more preferably about 1 to 150 μm. be.

Next, the present invention will be described in more detail based on Examples, but the present invention is not limited to such Examples. In the following examples, "parts" means "parts by mass" unless otherwise specified.

Production example 404.9 parts of deionized water, dispersant [manufactured by Kao Co., Ltd., trade name: Demor EP] 20 parts, dispersant [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Disccoat N-14] 16 .7 parts, antifoaming agent [manufactured by Sannopco Co., Ltd., trade name: Nopco 8034L] 5.0 parts, calcium carbonate [heavy calcium carbonate, manufactured by Maruo Calcium Co., Ltd., R heavy coal, average particle size: 7. 4 μm] 1000 parts and 6 parts of thickener [Nippon Catalyst Co., Ltd., trade name: Acryset WR-503A] are mixed under stirring with a dispersion, and then aged by stirring at ^{3000 min -1 for 30 minutes.} This was carried out and filtered through a wire mesh of 100 mesh (JIS mesh, the same applies hereinafter) to obtain a calcium carbonate paste having a non-volatile content of 70% by mass. The non-volatile content of the calcium carbonate paste was determined by the same method as the non-volatile content of the resin emulsion.

Example 1
96.7 parts of deionized water was placed in a flask equipped with a dropping funnel, a stirrer, a nitrogen gas introduction tube, a thermometer and a reflux condenser.

In the dropping funnel, 32.6 parts of deionized water, 16.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], formula (IV) as a polyoxyalkylene alkyl ether. A 25% aqueous solution of a polyoxyalkylene alkyl ether represented by (R ⁶ is an alkyl group having 6 carbon atoms, R ⁷ is an alkyl group having 5 carbon atoms, R ⁸ is an alkylene group having 2 carbon atoms, and s is 15). A pre-emulsifier for dropping was prepared consisting of 0 part, 72.5 parts of styrene, 23.5 parts of 2-ethylhexyl acrylate, 2.0 parts of acrylic acid, 0.5 part of 2-hydroxyethyl methacrylate and 1.5 parts of acrylonitrile. ..

Of the obtained pre-emulsion for dropping, 5.0 parts were added into the flask, the temperature was raised to 80 ° C. while gently blowing nitrogen gas, and 1.4 parts of a 3.5% ammonium persulfate aqueous solution was added into the flask. Was added to and emulsion polymerization was started.

Next, the rest of the pre-emulsion for dropping, 8.6 parts of a 3.5% ammonium persulfate aqueous solution and 6.0 parts of a 2.5% sodium hydrogen sulfite aqueous solution were dropped into the flask over 240 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 120 minutes.

Then, 25% aqueous ammonia was added, and the pH [measured at 23 ° C. using HORIBA, Ltd., product number: F-23, the same applies hereinafter] was adjusted to 8 to complete the emulsion polymerization reaction. The obtained reaction mixture was cooled to room temperature and then filtered through a 300 mesh wire mesh to obtain a resin emulsion having a non-volatile content of 40.0% by mass.

The glass transition temperature of the entire emulsion particles contained in the resin emulsion obtained above was 38.4 ° C. The average particle size of the emulsion particles was 110 nm.

Next, while dispersing 100 parts of the resin emulsion obtained above with a homodisper at 1000 min ^-1 , 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate [JNC (JNC)) as a film-forming aid. Co., Ltd., product number: CS-12] was added to the resin emulsion so that the film forming temperature was 0 ° C. to obtain a mixture.

The calcium carbonate paste was added to the mixture obtained above so that the amount of the calcium carbonate paste obtained in the production example was 60% by mass of the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether and the calcium carbonate paste. Is added, and an appropriate amount of diluted water and an appropriate amount of silicone-based defoaming agent [manufactured by Sannopco Co., Ltd., trade name: SN Deformer 777] are added to the mixture so that the non-volatile content becomes 50% by mass, and then BM. Use a type viscous meter [manufactured by Tokyo Keiki Co., Ltd.] to apply a thickener [manufactured by ADEKA Co., Ltd., trade name: Adecanol UH-420] so that the viscosity at 25 ° C. at a ^{rotation speed of 30 min -1 becomes 2000 mPa · s.} The mixture was added to the mixture and stirred at a rotation speed of 1000 ^{min -1} for 15 minutes to obtain an aqueous resin composition for a sealer.

Example 2
96.7 parts of deionized water was placed in a flask equipped with a dropping funnel, a stirrer, a nitrogen gas introduction tube, a thermometer and a reflux condenser.

In the dropping funnel, 32.6 parts of deionized water, a polyoxyalkylene alkyl ether represented by the formula (IV) as a polyoxyalkylene alkyl ether (R ⁶ is an alkyl group having 6 carbon atoms, R ⁷ is an alkyl group having 5 carbon atoms). , R ⁸ is an alkylene group having 2 carbon atoms, s is 40) 25% aqueous solution 16.0 parts, styrene 72.5 parts, 2-ethylhexyl acrylate 23.5 parts, acrylic acid 2.0 parts, 2- A dropping preemulsion consisting of 0.5 part of hydroxyethyl methacrylate and 1.5 parts of acrylonitrile was prepared.

Of the obtained pre-emulsion for dropping, 5.0 parts were added into the flask, the temperature was raised to 80 ° C. while gently blowing nitrogen gas, and 1.4 parts of a 3.5% ammonium persulfate aqueous solution was added into the flask. Was added to and emulsion polymerization was started.

Next, the rest of the pre-emulsion for dropping, 8.6 parts of a 3.5% ammonium persulfate aqueous solution and 6.0 parts of a 2.5% sodium hydrogen sulfite aqueous solution were dropped into the flask over 240 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 120 minutes.

Then, 25% aqueous ammonia was added to adjust the pH to 8, and the emulsion polymerization reaction was completed. The obtained reaction mixture was cooled to room temperature and then filtered through a 300 mesh wire mesh to obtain a resin emulsion having a non-volatile content of 40.0% by mass.

The glass transition temperature of the entire emulsion particles contained in the resin emulsion obtained above was 38.4 ° C. The average particle size of the emulsion particles was 110 nm.

Next, while dispersing 100 parts of the resin emulsion obtained above with a homodisper at 1000 min ^-1 , 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate [JNC (JNC)) as a film-forming aid. Co., Ltd., product number: CS-12] was added to the resin emulsion so that the film forming temperature was 0 ° C. to obtain a mixture.

The calcium carbonate paste was added to the mixture obtained above so that the amount of the calcium carbonate paste obtained in the production example was 60% by mass of the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether and the calcium carbonate paste. Is added, and an appropriate amount of diluted water and an appropriate amount of silicone-based defoaming agent [manufactured by Sannopco Co., Ltd., trade name: SN Deformer 777] are added to the mixture so that the non-volatile content becomes 50% by mass, and then BM. Use a type viscous meter [manufactured by Tokyo Keiki Co., Ltd.] to apply a thickener [manufactured by ADEKA Co., Ltd., trade name: Adecanol UH-420] so that the viscosity at 25 ° C. at a ^{rotation speed of 30 min -1 becomes 2000 mPa · s.} The mixture was added to the mixture and stirred at a rotation speed of 1000 ^{min -1} for 15 minutes to obtain an aqueous resin composition for a sealer.

Example 3
96.7 parts of deionized water was placed in a flask equipped with a dropping funnel, a stirrer, a nitrogen gas introduction tube, a thermometer and a reflux condenser.

In the dropping funnel, 32.6 parts of deionized water, 16.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], formula (IV) as a polyoxyalkylene alkyl ether. A 25% aqueous solution of a polyoxyalkylene alkyl ether represented by (R ⁶ is an alkyl group having 6 carbon atoms, R ⁷ is an alkyl group having 5 carbon atoms, R ⁸ is an alkylene group having 2 carbon atoms, and s is 40). .0 parts, styrene 73.0 parts, 2-ethylhexyl acrylate 23.0 parts, acrylic acid 2.0 parts, 2-hydroxyethyl methacrylate 0.5 parts, acrylonitrile 0.5 parts and acetoacetoxyethyl methacrylate 1.0 parts A pre-emulsion for dropping was prepared.

Of the obtained pre-emulsion for dropping, 5.0 parts were added into the flask, the temperature was raised to 80 ° C. while gently blowing nitrogen gas, and 1.4 parts of a 3.5% ammonium persulfate aqueous solution was added into the flask. Was added to and emulsion polymerization was started.

Next, the rest of the pre-emulsion for dropping, 8.6 parts of a 3.5% ammonium persulfate aqueous solution and 6.0 parts of a 2.5% sodium hydrogen sulfite aqueous solution were dropped into the flask over 240 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 120 minutes.

Then, 25% aqueous ammonia was added to adjust the pH to 8, and the emulsion polymerization reaction was completed. The obtained reaction mixture was cooled to room temperature and then filtered through a 300 mesh wire mesh to obtain a resin emulsion having a non-volatile content of 40.0% by mass.

The glass transition temperature of the entire emulsion particles contained in the resin emulsion obtained above was 38.8 ° C. The average particle size of the emulsion particles was 110 nm.

Next, while dispersing 100 parts of the resin emulsion obtained above with a homodisper at 1000 min ^-1 , 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate [JNC (JNC)) as a film-forming aid. Co., Ltd., product number: CS-12] was added to the resin emulsion so that the film forming temperature was 0 ° C. to obtain a mixture.

The calcium carbonate paste was added to the mixture obtained above so that the amount of the calcium carbonate paste obtained in the production example was 60% by mass of the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether and the calcium carbonate paste. Is added, and an appropriate amount of diluted water and an appropriate amount of silicone-based defoaming agent [manufactured by Sannopco Co., Ltd., trade name: SN Deformer 777] are added to the mixture so that the non-volatile content becomes 50% by mass, and then BM. Use a type viscous meter [manufactured by Tokyo Keiki Co., Ltd.] to apply a thickener [manufactured by ADEKA Co., Ltd., trade name: Adecanol UH-420] so that the viscosity at 25 ° C. at a ^{rotation speed of 30 min -1 becomes 2000 mPa · s.} The mixture was added to the mixture and stirred at a rotation speed of 1000 ^{min -1} for 15 minutes to obtain an aqueous resin composition for a sealer.

Example 4
90.4 parts of deionized water was charged in a flask equipped with a dropping funnel, a stirrer, a nitrogen gas introduction tube, a thermometer and a reflux condenser.

In the dropping funnel, 12 parts of deionized water, 8.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], represented by the formula (IV) as a polyoxyalkylene alkyl ether. 16.0 aqueous 25% aqueous solution of polyoxyalkylene alkyl ether (R ⁶ is an alkyl group having 6 carbon atoms, R ⁷ is an alkyl group having 5 carbon atoms, R ⁸ is an alkylene group having 2 carbon atoms, and s is 15). A dropping preemulsifier consisting of 32.3 parts of styrene and 7.7 parts of 2-ethylhexyl acrylate was prepared.

Of the obtained pre-emulsion for dropping, 2.0 parts was added into the flask, the temperature was raised to 80 ° C. while gently blowing nitrogen gas, and 1.4 parts of a 3.5% ammonium persulfate aqueous solution was added into the flask. Was added to and polymerization was started.

Next, the rest of the pre-emulsion for dropping, 2.9 parts of a 3.5% ammonium persulfate aqueous solution and 2.0 parts of a 2.5% sodium hydrogen sulfite aqueous solution were dropped into the flask over 90 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 60 minutes.

Then, 30.9 parts of deionized water, 8.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], 30.0 parts of styrene, 2-ethylhexyl acrylate 24. Second-stage pre-aqueous solution consisting of 0 parts, 3.5 parts acrylic acid, 0.5 parts 2-hydroxyethyl methacrylate, 1.0 part diacetone acrylamide and 1.0 part acetoacetoxyethyl methacrylate, 3.5% excess 2.9 parts of an aqueous ammonium sulfate solution and 2.0 parts of a 2.5% aqueous sodium hydrogen sulfite solution were added dropwise into the flask over 90 minutes. After completion of the dropping, the mixture was maintained at a temperature of 80 ° C. for 60 minutes, 25% aqueous ammonia was added, the pH was adjusted to 8, and the emulsion polymerization reaction was completed. The obtained reaction mixture was cooled to room temperature and then filtered through a 300 mesh wire mesh to obtain a resin emulsion having a non-volatile content of 40.0% by mass.

The glass transition temperature of the entire emulsion particles contained in the resin emulsion obtained above was 20.6 ° C. The average particle size of the emulsion particles was 150 nm.

Next, while dispersing 100 parts of the resin emulsion obtained above with a homodisper at 1000 min ^-1 , 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate [JNC (JNC)) as a film-forming aid. Co., Ltd., product number: CS-12] was added to the resin emulsion so that the film forming temperature was 0 ° C. to obtain a mixture.

The calcium carbonate paste was added to the mixture obtained above so that the amount of the calcium carbonate paste obtained in the production example was 68% by mass of the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether and the calcium carbonate paste. Is added, and an appropriate amount of diluted water and an appropriate amount of silicone-based defoaming agent [manufactured by Sannopco Co., Ltd., trade name: SN Deformer 777] are added to the mixture so that the non-volatile content becomes 50% by mass, and then BM. Use a type viscous meter [manufactured by Tokyo Keiki Co., Ltd.] to apply a thickener [manufactured by ADEKA Co., Ltd., trade name: Adecanol UH-420] so that the viscosity at 25 ° C. at a ^{rotation speed of 30 min -1 becomes 2000 mPa · s.} The mixture was added to the mixture and stirred at a rotation speed of 1000 ^{min -1} for 15 minutes to obtain an aqueous resin composition for a sealer.

Example 5
90.4 parts of deionized water was charged in a flask equipped with a dropping funnel, a stirrer, a nitrogen gas introduction tube, a thermometer and a reflux condenser.

In the dropping funnel, 12 parts of deionized water, 8.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], 32.3 parts of styrene and 2-ethylhexyl acrylate 7. A dropping preemulsion consisting of 7 parts was prepared.

Of the obtained pre-emulsion for dropping, 2.0 parts was added into the flask, the temperature was raised to 80 ° C. while gently blowing nitrogen gas, and 1.4 parts of a 3.5% ammonium persulfate aqueous solution was added into the flask. Was added to and polymerization was started.

Next, the rest of the pre-emulsion for dropping, 2.9 parts of a 3.5% ammonium persulfate aqueous solution and 2.0 parts of a 2.5% sodium hydrogen sulfite aqueous solution were dropped into the flask over 90 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 60 minutes.

Then, 30.9 parts of deionized water, 8.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], represented by the formula (IV) as a polyoxyalkylene alkyl ether. 16.0 aqueous 25% aqueous solution of polyoxyalkylene alkyl ether (R ⁶ is an alkyl group having 6 carbon atoms, R ⁷ is an alkyl group having 5 carbon atoms, R ⁸ is an alkylene group having 2 carbon atoms, and s is 15). 30.0 parts of styrene, 24.0 parts of 2-ethylhexyl acrylate, 3.5 parts of acrylic acid, 0.5 part of 2-hydroxyethyl methacrylate, 1.0 part of diacetoneacrylamide and 1.0 part of acetoacetoxyethyl methacrylate A second-stage preemulsion comprising 2.9 parts of a 3.5% aqueous ammonium persulfate solution and 2.0 parts of a 2.5% aqueous sodium hydrogen sulfite solution were added dropwise into the flask over 90 minutes. After completion of the dropping, the mixture was maintained at a temperature of 80 ° C. for 60 minutes, 25% aqueous ammonia was added, the pH was adjusted to 8, and the emulsion polymerization reaction was completed. The obtained reaction mixture was cooled to room temperature and then filtered through a 300 mesh wire mesh to obtain a resin emulsion having a non-volatile content of 40.0% by mass.

The glass transition temperature of the entire emulsion particles contained in the resin emulsion obtained above was 20.6 ° C. The average particle size of the emulsion particles was 150 nm.

Next, while dispersing 100 parts of the resin emulsion obtained above with a homodisper at 1000 min ^-1 , 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate [JNC (JNC)) as a film-forming aid. Co., Ltd., product number: CS-12] was added to the resin emulsion so that the film forming temperature was 0 ° C. to obtain a mixture.

The calcium carbonate paste was added to the mixture obtained above so that the amount of the calcium carbonate paste obtained in the production example was 68% by mass of the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether and the calcium carbonate paste. Is added, and an appropriate amount of diluted water and an appropriate amount of silicone-based defoaming agent [manufactured by Sannopco Co., Ltd., trade name: SN Deformer 777] are added to the mixture so that the non-volatile content becomes 50% by mass, and then BM. Use a type viscous meter [manufactured by Tokyo Keiki Co., Ltd.] to apply a thickener [manufactured by ADEKA Co., Ltd., trade name: Adecanol UH-420] so that the viscosity at 25 ° C. at a ^{rotation speed of 30 min -1 becomes 2000 mPa · s.} The mixture was added to the mixture and stirred at a rotation speed of 1000 ^{min -1} for 15 minutes to obtain an aqueous resin composition for a sealer.

Example 6
90.4 parts of deionized water was charged in a flask equipped with a dropping funnel, a stirrer, a nitrogen gas introduction tube, a thermometer and a reflux condenser.

In the dropping funnel, 12 parts of deionized water, 8.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], represented by the formula (IV) as a polyoxyalkylene alkyl ether. 16.0 aqueous 25% aqueous solution of polyoxyalkylene alkyl ether (R ⁶ is an alkyl group having 6 carbon atoms, R ⁷ is an alkyl group having 5 carbon atoms, R ⁸ is an alkylene group having 2 carbon atoms, and s is 40). A dropping preemulsifier consisting of 32.3 parts of styrene and 7.7 parts of 2-ethylhexyl acrylate was prepared.

Of the obtained pre-emulsion for dropping, 2.0 parts was added into the flask, the temperature was raised to 80 ° C. while gently blowing nitrogen gas, and 1.4 parts of a 3.5% ammonium persulfate aqueous solution was added into the flask. Was added to and polymerization was started.

Next, the rest of the pre-emulsion for dropping, 2.9 parts of a 3.5% ammonium persulfate aqueous solution and 2.0 parts of a 2.5% sodium hydrogen sulfite aqueous solution were dropped into the flask over 90 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 60 minutes.

Then, 30.9 parts of deionized water, 8.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], 30.0 parts of styrene, 2-ethylhexyl acrylate 24. Second-stage pre-aqueous solution consisting of 0 parts, 3.5 parts acrylic acid, 0.5 parts 2-hydroxyethyl methacrylate, 1.0 part diacetone acrylamide and 1.0 part acetoacetoxyethyl methacrylate, 3.5% excess 2.9 parts of an aqueous ammonium sulfate solution and 2.0 parts of a 2.5% aqueous sodium hydrogen sulfite solution were added dropwise into the flask over 90 minutes. After completion of the dropping, the mixture was maintained at a temperature of 80 ° C. for 60 minutes, 25% aqueous ammonia was added, the pH was adjusted to 8, and the emulsion polymerization reaction was completed. The obtained reaction mixture was cooled to room temperature and then filtered through a 300 mesh wire mesh to obtain a resin emulsion having a non-volatile content of 40.0% by mass.

The glass transition temperature of the entire emulsion particles contained in the resin emulsion obtained above was 20.6 ° C. The average particle size of the emulsion particles was 150 nm.

Next, while dispersing 100 parts of the resin emulsion obtained above with a homodisper at 1000 min ^-1 , 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate [JNC (JNC)) as a film-forming aid. Co., Ltd., product number: CS-12] was added to the resin emulsion so that the film forming temperature was 0 ° C. to obtain a mixture.

The calcium carbonate paste was added to the mixture obtained above so that the amount of the calcium carbonate paste obtained in the production example was 68% by mass of the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether and the calcium carbonate paste. Is added, and an appropriate amount of diluted water and an appropriate amount of silicone-based defoaming agent [manufactured by Sannopco Co., Ltd., trade name: SN Deformer 777] are added to the mixture so that the non-volatile content becomes 50% by mass, and then BM. Use a type viscous meter [manufactured by Tokyo Keiki Co., Ltd.] to apply a thickener [manufactured by ADEKA Co., Ltd., trade name: Adecanol UH-420] so that the viscosity at 25 ° C. at a ^{rotation speed of 30 min -1 becomes 2000 mPa · s.} The mixture was added to the mixture and stirred at a rotation speed of 1000 ^{min -1} for 15 minutes to obtain an aqueous resin composition for a sealer.

Example 7
90.4 parts of deionized water was charged in a flask equipped with a dropping funnel, a stirrer, a nitrogen gas introduction tube, a thermometer and a reflux condenser.

In the dropping funnel, 12 parts of deionized water, 8.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], 32.3 parts of styrene and 2-ethylhexyl acrylate 7. A dropping preemulsion consisting of 7 parts was prepared.

Of the obtained pre-emulsion for dropping, 2.0 parts was added into the flask, the temperature was raised to 80 ° C. while gently blowing nitrogen gas, and 1.4 parts of a 3.5% ammonium persulfate aqueous solution was added into the flask. Was added to and polymerization was started.

Next, the rest of the pre-emulsion for dropping, 2.9 parts of a 3.5% ammonium persulfate aqueous solution and 2.0 parts of a 2.5% sodium hydrogen sulfite aqueous solution were dropped into the flask over 90 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 60 minutes.

Then, 30.9 parts of deionized water, 8.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], represented by the formula (IV) as a polyoxyalkylene alkyl ether. 16.0 aqueous 25% aqueous solution of polyoxyalkylene alkyl ether (R ⁶ is an alkyl group having 6 carbon atoms, R ⁷ is an alkyl group having 5 carbon atoms, R ⁸ is an alkylene group having 2 carbon atoms, and s is 40). 30.0 parts of styrene, 24.0 parts of 2-ethylhexyl acrylate, 3.5 parts of acrylic acid, 0.5 part of 2-hydroxyethyl methacrylate, 1.0 part of diacetoneacrylamide and 1.0 part of acetoacetoxyethyl methacrylate A second-stage preemulsion comprising 2.9 parts of a 3.5% aqueous ammonium persulfate solution and 2.0 parts of a 2.5% aqueous sodium hydrogen sulfite solution were added dropwise into the flask over 90 minutes. After completion of the dropping, the mixture was maintained at a temperature of 80 ° C. for 60 minutes, 25% aqueous ammonia was added, the pH was adjusted to 8, and the emulsion polymerization reaction was completed. The obtained reaction mixture was cooled to room temperature and then filtered through a 300 mesh wire mesh to obtain a resin emulsion having a non-volatile content of 40.0% by mass.

The glass transition temperature of the entire emulsion particles contained in the resin emulsion obtained above was 20.6 ° C. The average particle size of the emulsion particles was 150 nm.

Next, while dispersing 100 parts of the resin emulsion obtained above with a homodisper at 1000 min ^-1 , 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate [JNC (JNC)) as a film-forming aid. Co., Ltd., product number: CS-12] was added to the resin emulsion so that the film forming temperature was 0 ° C. to obtain a mixture.

The calcium carbonate paste was added to the mixture obtained above so that the amount of the calcium carbonate paste obtained in the production example was 68% by mass of the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether and the calcium carbonate paste. Is added, and an appropriate amount of diluted water and an appropriate amount of silicone-based defoaming agent [manufactured by Sannopco Co., Ltd., trade name: SN Deformer 777] are added to the mixture so that the non-volatile content becomes 50% by mass, and then BM. Use a type viscous meter [manufactured by Tokyo Keiki Co., Ltd.] to apply a thickener [manufactured by ADEKA Co., Ltd., trade name: Adecanol UH-420] so that the viscosity at 25 ° C. at a ^{rotation speed of 30 min -1 becomes 2000 mPa · s.} The mixture was added to the mixture and stirred at a rotation speed of 1000 ^{min -1} for 15 minutes to obtain an aqueous resin composition for a sealer.

Example 8
189 parts of deionized water was charged in a flask equipped with a dropping funnel, a stirrer, a nitrogen gas introduction tube, a thermometer and a reflux condenser.

A dropping funnel consisting of 10.3 parts of deionized water, 4.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon BC-10] and 30.0 parts of styrene. An emulsion was prepared.

Of the obtained pre-emulsion for dropping, 1.5 parts was added into the flask, the temperature was raised to 80 ° C. while gently blowing nitrogen gas, and 1.4 parts of a 3.5% ammonium persulfate aqueous solution was added into the flask. Was added to and polymerization was started.

Next, the rest of the pre-emulsion for dropping, 2.9 parts of a 3.5% ammonium persulfate aqueous solution and 2.0 parts of a 2.5% sodium hydrogen sulfite aqueous solution were dropped into the flask over 90 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 60 minutes.

Then, 11.8 parts of deionized water, 6.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], represented by the formula (IV) as a polyoxyalkylene alkyl ether. A 25% aqueous solution of a polyoxyalkylene alkyl ether (R ⁶ is an alkyl group having 6 carbon atoms, R ⁷ is an alkyl group having 5 carbon atoms, R ⁸ is an alkylene group having 2 carbon atoms, and s is 40). Second-stage preemulsifier consisting of 19.5 parts of styrene, 19.5 parts of 2-ethylhexyl acrylate and 1.0 part of acrylic acid, 2.9 parts of 3.5% aqueous ammonium persulfate solution and 2.5% hydrogen sulfite. 2.0 parts of an aqueous sodium solution was added dropwise into the flask over 90 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 60 minutes.

Next, 17.8 parts of deionized water, 6.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Product name: Aqualon BC-10], 6.0 parts of a 25% aqueous solution, polyoxyalkylene alkyl ether represented by the formula (IV) as a polyoxyalkylene alkyl ether (R ⁶ is an alkyl group having 6 carbon atoms, R ⁷ is a carbon The alkyl group of number 5, R ⁸ is an alkylene group having 2 carbon atoms, and s indicates 40), 8.0 parts of a 25% aqueous solution, 15.0 parts of styrene, 8.5 parts of 2-ethylhexyl acrylate, and 2. A third-stage preemulsifier consisting of 0 parts, 3.0 parts of acrylonitrile and 1.5 parts of acetoacetoxyethyl methacrylate, 2.9 parts of 3.5% ammonium persulfate aqueous solution and 2.0 parts of 2.5% sodium hydrogen sulfite aqueous solution. Was dropped into the flask over 90 minutes. After completion of the dropping, the mixture was maintained at a temperature of 80 ° C. for 60 minutes, 25% aqueous ammonia was added, the pH was adjusted to 8, and the emulsion polymerization reaction was completed. The obtained reaction mixture was cooled to room temperature and then filtered through a 300 mesh wire mesh to obtain a resin emulsion having a non-volatile content of 40.0% by mass.

The glass transition temperature of the entire emulsion particles contained in the resin emulsion obtained above was 27.9 ° C. The average particle size of the emulsion particles was 150 nm.

Next, while dispersing 100 parts of the resin emulsion obtained above with a homodisper at 1000 min ^-1 , 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate [JNC (JNC)) as a film-forming aid. Co., Ltd., product number: CS-12] was added to the resin emulsion so that the film forming temperature was 0 ° C. to obtain a mixture.

The calcium carbonate paste was added to the mixture obtained above so that the amount of the calcium carbonate paste obtained in the production example was 68% by mass of the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether and the calcium carbonate paste. Is added, and an appropriate amount of diluted water and an appropriate amount of silicone-based defoaming agent [manufactured by Sannopco Co., Ltd., trade name: SN Deformer 777] are added to the mixture so that the non-volatile content becomes 50% by mass, and then BM. Use a type viscous meter [manufactured by Tokyo Keiki Co., Ltd.] to apply a thickener [manufactured by ADEKA Co., Ltd., trade name: Adecanol UH-420] so that the viscosity at 25 ° C. at a ^{rotation speed of 30 min -1 becomes 2000 mPa · s.} The mixture was added to the mixture and stirred at a rotation speed of 1000 ^{min -1} for 15 minutes to obtain an aqueous resin composition for a sealer.

Example 9
189 parts of deionized water was charged in a flask equipped with a dropping funnel, a stirrer, a nitrogen gas introduction tube, a thermometer and a reflux condenser.

A dropping funnel consisting of 10.3 parts of deionized water, 4.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon BC-10] and 30.0 parts of styrene. An emulsion was prepared.

Of the obtained pre-emulsion for dropping, 1.5 parts was added into the flask, the temperature was raised to 80 ° C. while gently blowing nitrogen gas, and 1.4 parts of a 3.5% ammonium persulfate aqueous solution was added into the flask. Was added to and polymerization was started.

Next, the rest of the pre-emulsion for dropping, 2.9 parts of a 3.5% ammonium persulfate aqueous solution and 2.0 parts of a 2.5% sodium hydrogen sulfite aqueous solution were dropped into the flask over 90 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 60 minutes.

Then, 11.8 parts of deionized water, 6.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], represented by the formula (IV) as a polyoxyalkylene alkyl ether. A 25% aqueous solution of a polyoxyalkylene alkyl ether (R ⁶ is an alkyl group having 6 carbon atoms, R ⁷ is an alkyl group having 5 carbon atoms, R ⁸ is an alkylene group having 2 carbon atoms, and s is 15). Second-stage preemulsifier consisting of 19.5 parts of styrene, 19.5 parts of 2-ethylhexyl acrylate and 1.0 part of acrylic acid, 2.9 parts of 3.5% aqueous ammonium persulfate solution and 2.5% hydrogen sulfite. 2.0 parts of an aqueous sodium solution was added dropwise into the flask over 90 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 60 minutes.

Next, 17.8 parts of deionized water, 6.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Product name: Aqualon BC-10], 6.0 parts of a 25% aqueous solution, polyoxyalkylene alkyl ether represented by the formula (IV) as a polyoxyalkylene alkyl ether (R ⁶ is an alkyl group having 6 carbon atoms, R ⁷ is a carbon The alkyl group of number 5, R ⁸ is an alkylene group having 2 carbon atoms, and s indicates 15), 8.0 parts of a 25% aqueous solution, 15.0 parts of styrene, 8.5 parts of 2-ethylhexyl acrylate, and 2. A third-stage preemulsifier consisting of 0 parts, 3.0 parts of acrylonitrile and 1.5 parts of acetoacetoxyethyl methacrylate, 2.9 parts of 3.5% ammonium persulfate aqueous solution and 2.0 parts of 2.5% sodium hydrogen sulfite aqueous solution. Was dropped into the flask over 90 minutes. After completion of the dropping, the mixture was maintained at a temperature of 80 ° C. for 60 minutes, 25% aqueous ammonia was added, the pH was adjusted to 8, and the emulsion polymerization reaction was completed. The obtained reaction mixture was cooled to room temperature and then filtered through a 300 mesh wire mesh to obtain a resin emulsion having a non-volatile content of 40.0% by mass.

The glass transition temperature of the entire emulsion particles contained in the resin emulsion obtained above was 27.9 ° C. The average particle size of the emulsion particles was 150 nm.

Next, while dispersing 100 parts of the resin emulsion obtained above with a homodisper at 1000 min ^-1 , 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate [JNC (JNC)) as a film-forming aid. Co., Ltd., product number: CS-12] was added to the resin emulsion so that the film forming temperature was 0 ° C. to obtain a mixture.

The calcium carbonate paste was added to the mixture obtained above so that the amount of the calcium carbonate paste obtained in the production example was 68% by mass of the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether and the calcium carbonate paste. Is added, and an appropriate amount of diluted water and an appropriate amount of silicone-based defoaming agent [manufactured by Sannopco Co., Ltd., trade name: SN Deformer 777] are added to the mixture so that the non-volatile content becomes 50% by mass, and then BM. Use a type viscous meter [manufactured by Tokyo Keiki Co., Ltd.] to apply a thickener [manufactured by ADEKA Co., Ltd., trade name: Adecanol UH-420] so that the viscosity at 25 ° C. at a ^{rotation speed of 30 min -1 becomes 2000 mPa · s.} The mixture was added to the mixture and stirred at a rotation speed of 1000 ^{min -1} for 15 minutes to obtain an aqueous resin composition for a sealer.

Example 10
189 parts of deionized water was charged in a flask equipped with a dropping funnel, a stirrer, a nitrogen gas introduction tube, a thermometer and a reflux condenser.

A dropping funnel consisting of 10.3 parts of deionized water, 4.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon BC-10] and 30.0 parts of styrene. An emulsion was prepared.

Of the obtained pre-emulsion for dropping, 1.5 parts was added into the flask, the temperature was raised to 80 ° C. while gently blowing nitrogen gas, and 1.4 parts of a 3.5% ammonium persulfate aqueous solution was added into the flask. Was added to and polymerization was started.

Next, the rest of the pre-emulsion for dropping, 2.9 parts of a 3.5% ammonium persulfate aqueous solution and 2.0 parts of a 2.5% sodium hydrogen sulfite aqueous solution were dropped into the flask over 90 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 60 minutes.

Then, 11.8 parts of deionized water, 6.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], represented by the formula (IV) as a polyoxyalkylene alkyl ether. 16.0 aqueous 25% aqueous solution of polyoxyalkylene alkyl ether (R ⁶ is an alkyl group having 6 carbon atoms, R ⁷ is an alkyl group having 5 carbon atoms, R ⁸ is an alkylene group having 2 carbon atoms, and s is 40). Second-stage preemulsifier consisting of 19.5 parts of styrene, 19.5 parts of 2-ethylhexyl acrylate and 1.0 part of acrylic acid, 2.9 parts of 3.5% aqueous ammonium persulfate solution and 2.5% hydrogen sulfite. 2.0 parts of an aqueous sodium solution was added dropwise into the flask over 90 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 60 minutes.

Next, 17.8 parts of deionized water, 6.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aquaron KH-10], emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Product name: Aqualon BC-10] 25% aqueous solution 6.0 parts, styrene 15.0 parts, 2-ethylhexyl acrylate 8.5 parts, acrylic acid 2.0 parts, acrylonitrile 3.0 parts and acetacetoxyethyl methacrylate 1 A third-stage preemulsion consisting of .5 parts, 2.9 parts of a 3.5% aqueous ammonium persulfate solution and 2.0 parts of a 2.5% aqueous sodium hydrogen sulfite solution were added dropwise into the flask over 90 minutes. After completion of the dropping, the mixture was maintained at a temperature of 80 ° C. for 60 minutes, 25% aqueous ammonia was added, the pH was adjusted to 8, and the emulsion polymerization reaction was completed. The obtained reaction mixture was cooled to room temperature and then filtered through a 300 mesh wire mesh to obtain a resin emulsion having a non-volatile content of 40.0% by mass.

The glass transition temperature of the entire emulsion particles contained in the resin emulsion obtained above was 27.9 ° C. The average particle size of the emulsion particles was 150 nm.

Next, while dispersing 100 parts of the resin emulsion obtained above with a homodisper at 1000 min ^-1 , 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate [JNC (JNC)) as a film-forming aid. Co., Ltd., product number: CS-12] was added to the resin emulsion so that the film forming temperature was 0 ° C. to obtain a mixture.

The calcium carbonate paste was added to the mixture obtained above so that the amount of the calcium carbonate paste obtained in the production example was 68% by mass of the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether and the calcium carbonate paste. Is added, and an appropriate amount of diluted water and an appropriate amount of silicone-based defoaming agent [manufactured by Sannopco Co., Ltd., trade name: SN Deformer 777] are added to the mixture so that the non-volatile content becomes 50% by mass, and then BM. Use a type viscous meter [manufactured by Tokyo Keiki Co., Ltd.] to apply a thickener [manufactured by ADEKA Co., Ltd., trade name: Adecanol UH-420] so that the viscosity at 25 ° C. at a ^{rotation speed of 30 min -1 becomes 2000 mPa · s.} The mixture was added to the mixture and stirred at a rotation speed of 1000 ^{min -1} for 15 minutes to obtain an aqueous resin composition for a sealer.

Example 11
189 parts of deionized water was charged in a flask equipped with a dropping funnel, a stirrer, a nitrogen gas introduction tube, a thermometer and a reflux condenser.

A dropping funnel consisting of 10.3 parts of deionized water, 4.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon BC-10] and 30.0 parts of styrene. An emulsion was prepared.

Of the obtained pre-emulsion for dropping, 1.5 parts was added into the flask, the temperature was raised to 80 ° C. while gently blowing nitrogen gas, and 1.4 parts of a 3.5% ammonium persulfate aqueous solution was added into the flask. Was added to and polymerization was started.

Next, the rest of the pre-emulsion for dropping, 2.9 parts of a 3.5% ammonium persulfate aqueous solution and 2.0 parts of a 2.5% sodium hydrogen sulfite aqueous solution were dropped into the flask over 90 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 60 minutes.

After that, 11.8 parts of deionized water, 6.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], 19.5 parts of styrene, 2-ethylhexyl acrylate 19. A second-stage preemulsion consisting of 5 parts and 1.0 part of acrylic acid, 2.9 parts of a 3.5% ammonium persulfate aqueous solution and 2.0 parts of a 2.5% sodium bisulfite aqueous solution were placed in a flask over 90 minutes. Dropped. After completion of the dropping, the temperature was maintained at 80 ° C. for 60 minutes.

Next, 17.8 parts of deionized water, 6.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Product name: Aqualon BC-10], 6.0 parts of a 25% aqueous solution, polyoxyalkylene alkyl ether represented by the formula (IV) as a polyoxyalkylene alkyl ether (R ⁶ is an alkyl group having 6 carbon atoms, R ⁷ is a carbon Alkyl group of number 5, R ⁸ is an alkylene group having 2 carbon atoms, s indicates 40) 25% aqueous solution of 16.0 parts, styrene 15.0 parts, 2-ethylhexyl acrylate 8.5 parts, acrylic acid 2. A third-stage preemulsifier consisting of 0 parts, 3.0 parts of acrylonitrile and 1.5 parts of acetoacetoxyethyl methacrylate, 2.9 parts of 3.5% ammonium persulfate aqueous solution and 2.0 parts of 2.5% sodium hydrogen sulfite aqueous solution. Was dropped into the flask over 90 minutes. After completion of the dropping, the mixture was maintained at a temperature of 80 ° C. for 60 minutes, 25% aqueous ammonia was added, the pH was adjusted to 8, and the emulsion polymerization reaction was completed. The obtained reaction mixture was cooled to room temperature and then filtered through a 300 mesh wire mesh to obtain a resin emulsion having a non-volatile content of 40.0% by mass.

The glass transition temperature of the entire emulsion particles contained in the resin emulsion obtained above was 27.9 ° C. The average particle size of the emulsion particles was 150 nm.

Next, while dispersing 100 parts of the resin emulsion obtained above with a homodisper at 1000 min ^-1 , 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate [JNC (JNC)) as a film-forming aid. Co., Ltd., product number: CS-12] was added to the resin emulsion so that the film forming temperature was 0 ° C. to obtain a mixture.

The calcium carbonate paste was added to the mixture obtained above so that the amount of the calcium carbonate paste obtained in the production example was 68% by mass of the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether and the calcium carbonate paste. Is added, and an appropriate amount of diluted water and an appropriate amount of silicone-based defoaming agent [manufactured by Sannopco Co., Ltd., trade name: SN Deformer 777] are added to the mixture so that the non-volatile content becomes 50% by mass, and then BM. Use a type viscous meter [manufactured by Tokyo Keiki Co., Ltd.] to apply a thickener [manufactured by ADEKA Co., Ltd., trade name: Adecanol UH-420] so that the viscosity at 25 ° C. at a ^{rotation speed of 30 min -1 becomes 2000 mPa · s.} The mixture was added to the mixture and stirred at a rotation speed of 1000 ^{min -1} for 15 minutes to obtain an aqueous resin composition for a sealer.

Example 12
96.7 parts of deionized water was placed in a flask equipped with a dropping funnel, a stirrer, a nitrogen gas introduction tube, a thermometer and a reflux condenser.

In the dropping funnel, 32.6 parts of deionized water, 16.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], formula (IV) as a polyoxyalkylene alkyl ether. 16.0 parts of a 25% aqueous solution of a polyoxyalkylene alkyl ether represented by (R ⁶ is an alkyl group having 11 carbon atoms, R ⁷ is a hydrogen atom, R ^{8 is an alkylene group having 2 carbon atoms, and s is 50).} A dropping pre-emulsifier consisting of 72.5 parts of styrene, 23.5 parts of 2-ethylhexyl acrylate, 2.0 parts of acrylic acid, 0.5 part of 2-hydroxyethyl methacrylate and 1.5 parts of acrylonitrile was prepared.

Of the obtained pre-emulsion for dropping, 5.0 parts were added into the flask, the temperature was raised to 80 ° C. while gently blowing nitrogen gas, and 1.4 parts of a 3.5% ammonium persulfate aqueous solution was added into the flask. Was added to and emulsion polymerization was started.

Next, the rest of the pre-emulsion for dropping, 8.6 parts of a 3.5% ammonium persulfate aqueous solution and 6.0 parts of a 2.5% sodium hydrogen sulfite aqueous solution were dropped into the flask over 240 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 120 minutes.

Then, 25% aqueous ammonia was added to adjust the pH to 8, and the emulsion polymerization reaction was completed. The obtained reaction mixture was cooled to room temperature and then filtered through a 300 mesh wire mesh to obtain a resin emulsion having a non-volatile content of 40.0% by mass.

The glass transition temperature of the entire emulsion particles contained in the resin emulsion obtained above was 38.4 ° C. The average particle size of the emulsion particles was 110 nm.

Next, while dispersing 100 parts of the resin emulsion obtained above with a homodisper at 1000 min ^-1 , 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate [JNC (JNC)) as a film-forming aid. Co., Ltd., product number: CS-12] was added to the resin emulsion so that the film forming temperature was 0 ° C. to obtain a mixture.

The calcium carbonate paste was added to the mixture obtained above so that the amount of the calcium carbonate paste obtained in the production example was 60% by mass of the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether and the calcium carbonate paste. Is added, and an appropriate amount of diluted water and an appropriate amount of silicone-based defoaming agent [manufactured by Sannopco Co., Ltd., trade name: SN Deformer 777] are added to the mixture so that the non-volatile content becomes 50% by mass, and then BM. Use a type viscous meter [manufactured by Tokyo Keiki Co., Ltd.] to apply a thickener [manufactured by ADEKA Co., Ltd., trade name: Adecanol UH-420] so that the viscosity at 25 ° C. at a ^{rotation speed of 30 min -1 becomes 2000 mPa · s.} The mixture was added to the mixture and stirred at a rotation speed of 1000 ^{min -1} for 15 minutes to obtain an aqueous resin composition for a sealer.

Example 13
96.7 parts of deionized water was placed in a flask equipped with a dropping funnel, a stirrer, a nitrogen gas introduction tube, a thermometer and a reflux condenser.

In the dropping funnel, 32.6 parts of deionized water, 16.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], formula (IV) as a polyoxyalkylene alkyl ether. A 25% aqueous solution of a polyoxyalkylene alkyl ether represented by (R ⁶ is an alkyl group having 6 carbon atoms, R ⁷ is an alkyl group having 5 carbon atoms, R ⁸ is an alkylene group having 2 carbon atoms, and s is 40). From 0.0 parts, 73.0 parts of styrene, 23.0 parts of 2-ethylhexyl acrylate, 2.0 parts of acrylic acid, 0.5 parts of 2-hydroxyethyl methacrylate, 0.5 parts of acrylonitrile and 1.0 part of allylacetacetate. A pre-emulsion for dropping was prepared.

Of the obtained pre-emulsion for dropping, 5.0 parts were added into the flask, the temperature was raised to 80 ° C. while gently blowing nitrogen gas, and 1.4 parts of a 3.5% ammonium persulfate aqueous solution was added into the flask. Was added to and emulsion polymerization was started.

Next, the rest of the pre-emulsion for dropping, 8.6 parts of a 3.5% ammonium persulfate aqueous solution and 6.0 parts of a 2.5% sodium hydrogen sulfite aqueous solution were dropped into the flask over 240 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 120 minutes.

Then, 25% aqueous ammonia was added to adjust the pH to 8, and the emulsion polymerization reaction was completed. The obtained reaction mixture was cooled to room temperature and then filtered through a 300 mesh wire mesh to obtain a resin emulsion having a non-volatile content of 40.0% by mass.

The glass transition temperature of the entire emulsion particles contained in the resin emulsion obtained above was 38.9 ° C. The average particle size of the emulsion particles was 110 nm.

Next, while dispersing 100 parts of the resin emulsion obtained above with a homodisper at 1000 min ^-1 , 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate [JNC (JNC)) as a film-forming aid. Co., Ltd., product number: CS-12] was added to the resin emulsion so that the film forming temperature was 0 ° C. to obtain a mixture.

The calcium carbonate paste was added to the mixture obtained above so that the amount of the calcium carbonate paste obtained in the production example was 60% by mass of the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether and the calcium carbonate paste. Is added, and an appropriate amount of diluted water and an appropriate amount of silicone-based defoaming agent [manufactured by Sannopco Co., Ltd., trade name: SN Deformer 777] are added to the mixture so that the non-volatile content becomes 50% by mass, and then BM. Use a type viscous meter [manufactured by Tokyo Keiki Co., Ltd.] to apply a thickener [manufactured by ADEKA Co., Ltd., trade name: Adecanol UH-420] so that the viscosity at 25 ° C. at a ^{rotation speed of 30 min -1 becomes 2000 mPa · s.} The mixture was added to the mixture and stirred at a rotation speed of 1000 ^{min -1} for 15 minutes to obtain an aqueous resin composition for a sealer.

Comparative Example 1
96.7 parts of deionized water was placed in a flask equipped with a dropping funnel, a stirrer, a nitrogen gas introduction tube, a thermometer and a reflux condenser.

In the dropping funnel, 32.6 parts of deionized water, 8.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon BC-10], 72.5 parts of styrene, 2-ethylhexyl acrylate. A dropping preemulsion consisting of 23.5 parts, 2.0 parts of acrylic acid, 0.5 parts of 2-hydroxyethyl methacrylate and 1.5 parts of acrylonitrile was prepared.

Of the obtained pre-emulsion for dropping, 5.0 parts were added into the flask, the temperature was raised to 80 ° C. while gently blowing nitrogen gas, and 1.4 parts of a 3.5% ammonium persulfate aqueous solution was added into the flask. Was added to and emulsion polymerization was started.

Next, the rest of the pre-emulsion for dropping, 8.6 parts of a 3.5% ammonium persulfate aqueous solution and 6.0 parts of a 2.5% sodium hydrogen sulfite aqueous solution were dropped into the flask over 240 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 120 minutes.

Then, 25% aqueous ammonia was added to adjust the pH to 8, and the emulsion polymerization reaction was completed. The obtained reaction mixture was cooled to room temperature and then filtered through a 300 mesh wire mesh to obtain a resin emulsion having a non-volatile content of 40.0% by mass.

The glass transition temperature of the entire emulsion particles contained in the resin emulsion obtained above was 38.2 ° C. The average particle size of the emulsion particles was 110 nm.

Next, while dispersing 100 parts of the resin emulsion obtained above with a homodisper at 1000 min ^-1 , 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate [JNC (JNC)) as a film-forming aid. Co., Ltd., product number: CS-12] was added to the resin emulsion so that the film forming temperature was 0 ° C. to obtain a mixture.

The calcium carbonate paste was added to the mixture obtained above so that the amount of the calcium carbonate paste obtained in the production example was 68% by mass of the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether and the calcium carbonate paste. Is added, and an appropriate amount of diluted water and an appropriate amount of silicone-based defoaming agent [manufactured by Sannopco Co., Ltd., trade name: SN Deformer 777] are added to the mixture so that the non-volatile content becomes 50% by mass, and then BM. Use a type viscous meter [manufactured by Tokyo Keiki Co., Ltd.] to apply a thickener [manufactured by ADEKA Co., Ltd., trade name: Adecanol UH-420] so that the viscosity at 25 ° C. at a ^{rotation speed of 30 min -1 becomes 2000 mPa · s.} The mixture was added to the mixture and stirred at a rotation speed of 1000 ^{min -1} for 15 minutes to obtain an aqueous resin composition for a sealer.

Comparative Example 2
96.7 parts of deionized water was placed in a flask equipped with a dropping funnel, a stirrer, a nitrogen gas introduction tube, a thermometer and a reflux condenser.

In the dropping funnel, 32.6 parts of deionized water, 32.0 parts of 25% aqueous solution of emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon BC-10], 72.5 parts of styrene, 2-ethylhexyl acrylate. A dropping preemulsion consisting of 23.5 parts, 2.0 parts of acrylic acid, 0.5 parts of 2-hydroxyethyl methacrylate and 1.5 parts of acrylonitrile was prepared.

Of the obtained pre-emulsion for dropping, 5.0 parts were added into the flask, the temperature was raised to 80 ° C. while gently blowing nitrogen gas, and 1.4 parts of a 3.5% ammonium persulfate aqueous solution was added into the flask. Was added to and emulsion polymerization was started.

Next, the rest of the pre-emulsion for dropping, 8.6 parts of a 3.5% ammonium persulfate aqueous solution and 6.0 parts of a 2.5% sodium hydrogen sulfite aqueous solution were dropped into the flask over 240 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 120 minutes.

Then, 25% aqueous ammonia was added to adjust the pH to 8, and the emulsion polymerization reaction was completed. The obtained reaction mixture was cooled to room temperature and then filtered through a 300 mesh wire mesh to obtain a resin emulsion having a non-volatile content of 40.0% by mass.

The glass transition temperature of the entire emulsion particles contained in the resin emulsion obtained above was 38.2 ° C. The average particle size of the emulsion particles was 110 nm.

Next, while dispersing 100 parts of the resin emulsion obtained above with a homodisper at 1000 min ^-1 , 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate [JNC (JNC)) as a film-forming aid. Co., Ltd., product number: CS-12] was added to the resin emulsion so that the film forming temperature was 0 ° C. to obtain a mixture.

The calcium carbonate paste was added to the mixture obtained above so that the amount of the calcium carbonate paste obtained in the production example was 68% by mass of the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether and the calcium carbonate paste. Is added, and an appropriate amount of diluted water and an appropriate amount of silicone-based defoaming agent [manufactured by Sannopco Co., Ltd., trade name: SN Deformer 777] are added to the mixture so that the non-volatile content becomes 50% by mass, and then BM. Use a type viscous meter [manufactured by Tokyo Keiki Co., Ltd.] to apply a thickener [manufactured by ADEKA Co., Ltd., trade name: Adecanol UH-420] so that the viscosity at 25 ° C. at a ^{rotation speed of 30 min -1 becomes 2000 mPa · s.} The mixture was added to the mixture and stirred at a rotation speed of 1000 ^{min -1} for 15 minutes to obtain an aqueous resin composition for a sealer.

Comparative Example 3
96.7 parts of deionized water was placed in a flask equipped with a dropping funnel, a stirrer, a nitrogen gas introduction tube, a thermometer and a reflux condenser.

In the dropping funnel, 32.6 parts of deionized water, 16.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], formula (IV) as a polyoxyalkylene alkyl ether. A 25% aqueous solution of a polyoxyalkylene alkyl ether represented by (R ⁶ is an alkyl group having 6 carbon atoms, R ⁷ is an alkyl group having 5 carbon atoms, R ⁸ is an alkylene group having 2 carbon atoms, and s is 15). A pre-emulsifier for dropping was prepared consisting of 0 part, 72.5 parts of styrene, 23.5 parts of 2-ethylhexyl acrylate, 2.0 parts of acrylic acid, 0.5 part of 2-hydroxyethyl methacrylate and 1.5 parts of acrylonitrile. ..

Of the obtained pre-emulsion for dropping, 5.0 parts were added into the flask, the temperature was raised to 80 ° C. while gently blowing nitrogen gas, and 1.4 parts of a 3.5% ammonium persulfate aqueous solution was added into the flask. Was added to and emulsion polymerization was started.

Next, the rest of the pre-emulsion for dropping, 8.6 parts of a 3.5% ammonium persulfate aqueous solution and 6.0 parts of a 2.5% sodium hydrogen sulfite aqueous solution were dropped into the flask over 240 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 120 minutes.

Then, 25% aqueous ammonia was added to adjust the pH to 8, and the emulsion polymerization reaction was completed. The obtained reaction mixture was cooled to room temperature and then filtered through a 300 mesh wire mesh to obtain a resin emulsion having a non-volatile content of 40.0% by mass.

The glass transition temperature of the entire emulsion particles contained in the resin emulsion obtained above was 38.4 ° C. The average particle size of the emulsion particles was 110 nm.

Next, while dispersing 100 parts of the resin emulsion obtained above with a homodisper at 1000 min ^-1 , 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate [JNC (JNC)) as a film-forming aid. Co., Ltd., product number: CS-12] was added to the resin emulsion so that the film forming temperature was 0 ° C. to obtain a mixture.

After adding an appropriate amount of diluted water and an appropriate amount of silicone-based defoamer [manufactured by Sannopco Co., Ltd., trade name: SN Deformer 777] to the mixture obtained above so that the non-volatile content is 35% by mass, BM Use a type viscometer [manufactured by Tokyo Keiki Co., Ltd.] to apply a thickener [manufactured by ADEKA Corporation, trade name: Adecanol UH-420] so that the viscosity at 25 ° C. at a ^{rotation speed of 30 min -1 becomes 2000 mPa · s.} The mixture was added and stirred at a rotation speed of 1000 ^{min -1} for 15 minutes to obtain an aqueous resin composition for a sealer.

Comparative Example 4
96.7 parts of deionized water was placed in a flask equipped with a dropping funnel, a stirrer, a nitrogen gas introduction tube, a thermometer and a reflux condenser.

In the dropping funnel, 32.6 parts of deionized water, 16.0 parts of a 25% aqueous solution of an emulsifier [manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name: Aqualon KH-10], formula (IV) as a polyoxyalkylene alkyl ether. A 25% aqueous solution of a polyoxyalkylene alkyl ether represented by (R ⁶ is an alkyl group having 6 carbon atoms, R ⁷ is an alkyl group having 5 carbon atoms, R ⁸ is an alkylene group having 2 carbon atoms, and s is 15). A pre-emulsifier for dropping was prepared consisting of 0 part, 72.5 parts of styrene, 23.5 parts of 2-ethylhexyl acrylate, 2.0 parts of acrylic acid, 0.5 part of 2-hydroxyethyl methacrylate and 1.5 parts of acrylonitrile. ..

Of the obtained pre-emulsion for dropping, 5.0 parts were added into the flask, the temperature was raised to 80 ° C. while gently blowing nitrogen gas, and 1.4 parts of a 3.5% ammonium persulfate aqueous solution was added into the flask. Was added to and emulsion polymerization was started.

Next, the rest of the pre-emulsion for dropping, 8.6 parts of a 3.5% ammonium persulfate aqueous solution and 6.0 parts of a 2.5% sodium hydrogen sulfite aqueous solution were dropped into the flask over 240 minutes. After completion of the dropping, the temperature was maintained at 80 ° C. for 120 minutes.

Then, 25% aqueous ammonia was added to adjust the pH to 8, and the emulsion polymerization reaction was completed. The obtained reaction mixture was cooled to room temperature and then filtered through a 300 mesh wire mesh to obtain a resin emulsion having a non-volatile content of 40.0% by mass.

The glass transition temperature of the entire emulsion particles contained in the resin emulsion obtained above was 38.4 ° C. The average particle size of the emulsion particles was 110 nm.

Next, while dispersing 100 parts of the resin emulsion obtained above with a homodisper at 1000 min ^-1 , 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate [JNC (JNC)) as a film-forming aid. Co., Ltd., product number: CS-12] was added to the resin emulsion so that the film forming temperature was 0 ° C. to obtain a mixture.

The calcium carbonate paste is added to the mixture obtained above so that the amount of the calcium carbonate paste obtained in the production example is 30% by mass of the total solid content of the emulsion particles, the polyoxyalkylene alkyl ether and the calcium carbonate paste. Is added, and an appropriate amount of diluted water and an appropriate amount of silicone-based defoaming agent [manufactured by Sannopco Co., Ltd., trade name: SN Deformer 777] are added to the mixture so that the non-volatile content becomes 50% by mass, and then BM. Use a type viscous meter [manufactured by Tokyo Keiki Co., Ltd.] to apply a thickener [manufactured by ADEKA Co., Ltd., trade name: Adecanol UH-420] so that the viscosity at 25 ° C. at a ^{rotation speed of 30 min -1 becomes 2000 mPa · s.} The mixture was added to the mixture and stirred at a rotation speed of 1000 ^{min -1} for 15 minutes to obtain an aqueous resin composition for a sealer.

Next, the aqueous resin composition for a sealer obtained in each Example or Comparative Example was allowed to stand in an atmosphere of 25 ° C. for 24 hours, and then the aqueous resin composition for a sealer was subjected to a slate plate using a sponge roll coater [Japan]. ^{A test plate was obtained by applying an amount of 60 g / m 2 to} a test panel (manufactured by Test Panel Co., Ltd., thickness: 15 mm) and drying at 100 ° C. for 10 minutes with a hot air dryer. Using the test plate obtained above, the physical properties of the water-based resin composition for sealer obtained above are water permeability resistance, blocking resistance, impregnation adhesion, bending resistance and moisture permeability based on the following methods. I checked it. The results are shown in Table 1.

<Water permeability>
A funnel (diameter: 10 cm) is placed on the coating film formed on the test plate, and the contact area between the two is sealed with a silicone-based bath bond [manufactured by Konishi Co., Ltd.] to comply with the "funnel method" specified in JIS K5400. According to this, the amount of water reduction after 24 hours was measured, and the water permeability was evaluated based on the following evaluation criteria.
(Evaluation criteria)
20 points: Water reduction amount ^{less than 0.03 mL / cm 2} 10 points: Water reduction amount 0.03 mL / cm ² or more and less than 0.10 mL / cm ² 0 points: Water reduction amount 0.10 mL / cm ² or more

<Blocking resistance>
After leaving the two test plates (7 x 15 cm) in an atmosphere of 60 ° C. for 1 hour, the surfaces on which the coating film of each test piece is formed are overlapped with each other, and a load of ^{100 g / cm 2 is applied on the surfaces.} After being hung and allowed to stand at a temperature of 60 ° C. for 24 hours in that state, each test plate was separated, the state of the coating film surface was visually observed, and evaluation was made based on the following evaluation criteria.
(Evaluation criteria)
20 points: There is no resistance when peeling off the coating films.
10 points: There is resistance when the coating films are peeled off, but there is no peeling after peeling.
0 point: There is resistance when the coating films are peeled off from each other, and peeling occurs after the peeling.

<Immersion adhesion>
The side surface and the back surface of the test piece other than the surface on which the coating film is formed are sealed with a silicone-based bath bond, immersed in 100 g of ion-exchanged water at 25 ° C. for 24 hours, and then the test plate is pulled out of the water to form a test plate. After removing the water adhering to the surface, the coating film of the test piece is cut with a cutter knife so that 100 2 mm square grids are formed, and cellophane adhesive tape [manufactured by Nichiban Co., Ltd., product number: CT405AP-18] was attached to this grid, a peeling test was conducted in accordance with JIS K5600, the number of remaining grids was counted, and evaluation was performed based on the following evaluation criteria.
(Evaluation criteria)
20 points: 90% or more of the remaining grids 10 points: 70% or more of the remaining grids and less than 90% 0 points: 70% or more of the remaining grids

<Bending resistance>
The aqueous resin composition for a sealer obtained above is applied to a polypropylene plate [manufactured by Nippon Test Panel Co., Ltd.] with a sponge roll coater so that the thickness of the coating film after drying is 250 μm, and then an atmosphere of 25 ° C. It was dried by allowing it to stand in it for 24 hours. Then, the coating film is peeled off from the polypropylene plate, cut into a size of 3 cm × 3 cm, immersed in 100 g of ion-exchanged water at 25 ° C. for 24 hours, then pulled out of the water and dried at 150 ° C. for 1 hour. To obtain a coating film for evaluation of bending resistance.

With the protractor placed along the coating film for evaluation of bending resistance obtained above, while bending the coating film, the morphology of the bent portion of the coating film was visually observed, and cracks occurred during the bending. In that case, the angle at that time was measured and evaluated based on the following evaluation criteria.
(Evaluation criteria)
20 points: No cracks occur even when the coating film is bent to 150 degrees or more.
10 points: No cracks occur when the coating film is bent 90 degrees or more and less than 150 degrees, but cracks occur when the coating film is bent 150 degrees or more.
0 point: Cracks occur when the coating film is bent below 90 degrees.

<Moisture permeability>
A moisture permeable cup (diameter: 10 cm) is placed on the coating film formed on the test plate, the contact part between the two is sealed with a silicone-based bath bond [manufactured by Konishi Co., Ltd.], and the "cup method" specified in JIS Z0208 is used. After being left in the air at 25 ° C. and 90% relative humidity for 24 hours, the moisture permeability was determined, and the moisture permeability was evaluated based on the following evaluation criteria.
(Evaluation criteria)
20 points: moisture permeability is 45g / m ² · 24h or more 10 points: moisture permeability is 35g / m ² · 24h or more 45g / m ² · 24h less than 0 point: moisture permeability is 35 g / m less than ² · 24h

〔comprehensive evaluation〕
Comprehensive evaluation was performed by totaling the evaluation scores for each test item. The water-based resin composition for a sealer, which has at least one evaluation of 0 points in the physical property evaluation, is unacceptable.

From the results shown in Table 1, all of the water-based resin compositions for sealers obtained in each example are excellent in water permeability, blocking resistance, impregnation adhesion, bending resistance and moisture permeability. It can be seen that a coating film is formed.

The water-based resin composition for a sealer of the present invention is useful for an undercoat material called a sealer applied to the front surface or the back surface of an inorganic building material such as a ceramic base material, and is used for factory coating, that is, in a factory. It can be suitably used as an undercoat paint used when painting an inorganic base material on a line.

Claims (10)

An aqueous resin composition used for a sealer, which is an emulsion particle having a plurality of resin layers, formula (IV):

(In the formula, R ⁶ is an alkyl group ^{having 1 to 18 carbon atoms, R 7} is a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, R ⁸ is an alkylene group having 2 to 4 carbon atoms, and s is an integer of 2 to 80 carbon atoms. Show)
In represented containing polyoxyalkylene alkyl ether and the inorganic filler Ru, monomer component in the equation to be used as a raw material for the outer layer of the emulsion particles (III):

(In the formula, R ⁵ is a hydrogen atom or a methyl group, and r is an integer of 1 to 4)
The acetoacetoxy group-containing monomer represented by is contained, and the amount of polyoxyalkylene alkyl ether per 100 parts by mass of all the monomer components used as the raw material of the emulsion particles is 0.1 to 10 parts by mass. The content of the acetoacetoxy group-containing monomer in all the monomer components used as the raw material of the emulsion particles is 0.1 to 10% by mass, and the emulsion particles, the polyoxyalkylene alkyl ether, and the inorganic filler sealer aqueous resin composition content of the inorganic filler and wherein 50 to 85% by mass Rukoto in total solids of the. A group in which all the monomer components used as raw materials for emulsion particles are alkyl (meth) acrylate, hydroxyl group-containing (meth) acrylate, carboxyl group-containing monomer, aromatic monomer, and nitrogen atom-containing monomer. The aqueous resin composition for a sealer according to claim 1, which is a monomer component containing at least one selected monomer. The aqueous resin composition for a sealer according to claim 1 or 2, wherein the monomer component used as a raw material for the outer layer of the emulsion particles contains a nitrogen atom-containing monomer. The aqueous resin composition for a sealer according to claim 2 or 3, wherein the nitrogen atom-containing monomer is at least one nitrogen atom-containing monomer selected from the group consisting of a (meth) acrylamide compound and (meth) acrylonitrile. .. A method for producing an aqueous resin composition used for a sealer, which comprises emulsion particles having a plurality of resin layers, formula (IV):

(In the formula, R ⁶ is an alkyl group ^{having 1 to 18 carbon atoms, R 7} is a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, R ⁸ is an alkylene group having 2 to 4 carbon atoms, and s is an integer of 2 to 80 carbon atoms. Show)
In the time of preparing the aqueous resin composition containing a polyoxyalkylene alkyl ether and the inorganic filler is Ru represented, the monomer component in the equation to be used as a raw material for the outer layer of the emulsion particles (III):

(In the formula, R ⁵ is a hydrogen atom or a methyl group, and r is an integer of 1 to 4)
The amount of polyoxyalkylene alkyl ether per 100 parts by mass of all the monomer components used as a raw material for emulsion particles is adjusted to 0.1 to 10 parts by mass by containing the acetoacetoxy group-containing monomer represented by. , The content of the acetoacetoxy group-containing monomer in all the monomer components used as the raw material of the emulsion particles is adjusted to 0.1 to 10% by mass, and the emulsion particles, the polyoxyalkylene alkyl ether, and the inorganic filler are adjusted. method for producing a sealer aqueous resin composition content of the inorganic filler in the total solid content, characterized that you adjusted to 50 to 85% by weight of the. A group in which all the monomer components used as raw materials for emulsion particles are alkyl (meth) acrylate, hydroxyl group-containing (meth) acrylate, carboxyl group-containing monomer, aromatic monomer, and nitrogen atom-containing monomer. The method for producing an aqueous resin composition for a sealer according to claim 5, which is a monomer component containing at least one selected monomer. The method for producing an aqueous resin composition for a sealer according to claim 5 or 6, wherein the monomer component used as a raw material for the outer layer of the emulsion particles contains a nitrogen atom-containing monomer. The aqueous resin composition for a sealer according to claim 6 or 7, wherein the nitrogen atom-containing monomer is at least one nitrogen atom-containing monomer selected from the group consisting of a (meth) acrylamide compound and (meth) acrylonitrile. Manufacturing method. A sealer containing the aqueous resin composition for a sealer according to any one of claims 1 to 4. An inorganic base material having a coating film comprising the sealer according to claim 9.