Water-based epoxy acrylic coating compositions

Claim 2

A coating composition comprising an emulsion of a partially-solubilized polymeric binder in water, wherein the polymeric binder comprises: A. from about 25 to about 75 percent by weight of polymer solids of an acrylic interpolymer derived from an alkyl acrylate or methacrylate ester, an ethylenically unsaturated carboxylic acid and, optionally, at least one other copolymerizable ethylenically-unsaturated monomer, wherein at least part of the acid carboxylic groups have been iminated with an alkylenimine, wherein said interpolymer is partially solubilized with a solubilizing agent, and wherein said acrylic interpolymer prior to partial solubilization with said solubilizing agent has an acid number of from about 20 to about 100; and B. from about 25 to about 75 percent by weight of polymer solids of a high molecular weight epoxy resin having the structure: ##EQU5## wherein n is an integer sufficient to provide the resin with a molecular weight of at least about 20,000; R 1 is a divalent aromatic radical selected from the group consisting of bisphenol A, substituted bisphenol A, bisphenol F, and substituted bisphenol F; R 2 is a C 1 to C 5 alkyl; and R 3 , R 4 and R 5 are individually selected from the group consisting of hydrogen and a C 1 to C 5 alkyl.

Claim 3

The composition as recited in claim 1 wherein the polymeric binder comprises from about 50 to about 70 percent by weight of polymer solids of the acrylic interpolymer and from about 30 to about 50 percent by weight of polymer solids of the epoxy resin.

Claim 4

The composition as recited in claim 1 wherein the polymeric binder comprises 50 percent by weight of polymer solids of the acrylic interpolymer and 50 percent by weight of polymer solids of the epoxy resin.

Claim 5

The composition as recited in claim 1 wherein the alkyl acrylate is selected from the group consisting of ethyl, methyl, propyl, butyl, hexyl, ethylhexyl and lauryl acrylate.

Claim 6

The composition as recited in claim 1 wherein the alkyl methacrylate is selected from the group consisting of ethyl, methyl, propyl, butyl, hexyl, ethylhexyl, and lauryl methacrylate.

Claim 7

The composition as recited in claim 1 wherein the ethylenically unsaturated carboxylic acid is selected from the group consisting of acrylic, methacrylic, crotonic, 3-butenoic, angelic, and tiglic acid.

Claim 8

The composition as recited in claim 1 wherein the other ethylenically unsaturated monomer is selected from the group consisting of monoolefinic and diolefinic hydrocarbons, halogenated monoolefinic and diolefinic hydrocarbons, unsaturated esters of organic and inorganic acids, esters of unsaturated acids, organic nitriles, and organic amides.

Claim 9

The composition as recited in claim 1 wherein the other ethylenically unsaturated monomer is selected from the group consisting of styrene, vinyl toluene, acrylonitrile and methacrylonitrile.

Claim 10

The composition as recited in claim 1 wherein the alkylenimine is selected from the group consisting of ethylenimine, hydroxyethyl ethylenimine, and propylenimine.

Claim 11

The composition as recited in claim 1 wherein the epoxy resin has a molecular weight of from about 40,000 to about 60,000.

Claim 12

A water-based sealer composition comprising: A. an emulsion of a partially-solubilized polymeric binder in water, wherein the polymeric binder comprises: 1. from about 25 to about 75 percent by weight of polymer solids of an acrylic interpolymer derived from an alkyl acrylate or methacrylate ester, an ethylenically unsaturated carboxylic acid, and, optionally, at least one other copolymerizable ethylenically unsaturated monomer, wherein at least part of the acid carboxylic groups have been iminated with an alkylenimine, wherein said interpolymer is partially solubilized with a solubilizing agent, and wherein said acrylic interpolymer prior to partial solubilization with said solubilizing agent has an acid number of from about 25 to about 100; and 2. from about 25 to about 75 percent by weight of polymer solids of a high molecular weight epoxy resin having the structure: ##EQU6## wherein n is an integer sufficient to provide the resin with a molecular weight of at least about 20,000; R 1 is a divalent aromatic radical selected from the group consisting of bisphenol A, substituted bisphenol A, bis-phenol F, and substituted bisphenol F; R 2 is a C 1 to C 5 alkyl; and R 3 , R 4 , and R 5 are individually selected from the group consisting of hydrogen and a C 1 to C 5 alkyl.

Claim 13

A water-based sealer composition comprising: A. an emulsion of a partially-solubilized polymeric binder in water, wherein the polymeric binder comprises: 1. from about 25 to about 75 percent by weight of polymer solids of an acrylic interpolymer derived from an alkyl acrylate or methacrylate ester, an ethylenically unsaturated carboxylic acid, and, optionally, at least one other copolymerizable ethylenically unsaturated monomer, wherein at least part of the acid carboxylic groups have been iminated with an alkylenimine, wherein said interpolymer is partially solubilized with a solubilizing agent, and wherein said acrylic interpolymer prior to partial solubilization with said solubilizing agent has an acid number of from about 25 to about 100; and 2. from about 25 to about 75 percent by weight of polymer solids of a high molecular weight epoxy resin having the structure: ##EQU6## wherein n is an integer sufficient to provide the resin with a molecular weight of at least about 20,000; R 1 is a divalent aromatic radical selected from the group consisting of bisphenol A, substituted bisphenol A, bis-phenol F, and substituted bisphenol F; R 2 is a C 1 to C 5 alkyl; and R 3 , R 4 , and R 5 are individually selected from the group consisting of hydrogen and a C 1 to C 5 alkyl.

Claim 14

The sealer compostion as recited in claim 11 wherein the polymeric binder comprises from about 50 to about 70 percent by weight of polymer solids of the acrylic interpolymer and from about 30 to about 50 percent by weight of polymer solids of the epoxy resin.

Claim 15

The sealer composition as recited in claim 11 wherein the alkyl acrylate is selected from the group consisting of ethyl, methyl, propyl, butyl, hexyl, ethylhexyl, and lauryl acrylate.

Claim 16

The sealer composition as recited in claim 11 wherein the alkyl methacrylate is selected from the group consisting of ethyl, methyl, propyl, butyl, hexyl, ethylhexyl, and lauryl methacrylate.

Claim 17

The sealer composition as recited in claim 11 wherein the ethylenically unsaturated carboxylic acid is selected from the group consisting of acrylic, methacrylic, crotonic, 3-butenoic, angelic, and tiglic acid.

Claim 18

The sealer composition as recited in claim 11 wherein the other ethylenically unsaturated monomer is selected from the group consisting of monoolefinic and diolefinic hydrocarbons, halogenated monoolefinic and diolefinic hydrocarbons, unsaturated esters of organic and inorganic acids, esters of unsaturated acids, organic nitriles, and organic amides.

Claim 19

The sealer composition as recited in claim 11 wherein the other ethylenically unsaturated monomer is selected from the group consisting of styrene, vinyl toluene, acrylonitrile and methacrylonitrile.

Claim 20

The sealer composition as recited in claim 11 wherein the alkylenimine is selected from the group consisting of ethylenimine, N-hydroxyethyl ethylenimine and propylenimine.

Claim 21

The sealer composition as recited in claim 11 wherein the epoxy resin has a molecular weight of from about 40,000 to about 60,000.