Aqueous thermoset coatings utilizing titanium chelate curing agents

Claim 2

A THERMOSETTING COATING COMPOSITION COMPRISING A. A WATER SOLUBLE OR WATER DISPERSIBLE POLYMER OF A HYDROXYALKYL ACRRYLATE OR METHACRYLATE WHEREIN THE HYDROXYALKYL GROUP CONTAINS 2 TO 4 CARBON ATOMS AND WHEREIN THE POLYMER IS

Claim 3

AN INHERENTLY WATER SOLUBLE POLYMER WHICH HAS A WEIGHT AVERAGE MOLECULAR WEIGHT OF LESS THAN 10,000 AND WHICH CONTAINS 10 TO 100% BY WEIGHT OF THE HYDROXYALKYL ACRYLATE OR METHACRYLATE AND 90 TO 0% BY WEIGHT OF A MONOMER COPOLYMERIZABLE THEREINWITH, SAID WEIGHT PERCENTAGES BEING BASED ON THE TOTAL WEIGHT OF POLYMER, OR

Claim 4

AN INHERENTLY WATER SOLUBLE POLYMER WHICH HAS A WEIGHT AVERAGE MOLECULAR WEIGHT OF LESS THAN 10,000 AND WHICH CONTAINS 10 TO 100% BY WEIGHT OF THE HYDROXYALKYL ACRYLATE OR METHACRYLATE AND 90 TO 0% BY WEIGHT OF A MONOMER COPOLYMERIZABLE THEREINWITH, SAID WEIGHT PERCENTAGES BEING BASED ON THE TOTAL WEIGHT OF POLYMER, OR

Claim 5

A POLYMER WHICH HAS SUFFICIENT ACID CONTENT TO BE WATER SOLUBLE OR WATER DISPERSIBLE WHEN SALTED WITH AN INORGANIC OR ORGANIC BASE, SAID POLYMER HAVING AN ACID VALUE OF AT LEAST 20 AND WHICH CONTAINS 10 TO 95% BY WEIGHT OF THE HYDROXYALKYL ACRYLATE OR METHACRYALTE, 5 TO 25% BY WEIGHT OF A POLYMERIZABLE ETHYLENICALLY UNSATURATED ACID OR A CARBOXYLIC ACID CONTAINING MERCAPTAN OR MIXTURE THEREOF AND 0 TO 85% BY WEIGHT OF A MONOMER COPOLYMERIZABLE THEREWITH, SAID WEIGHT PERCENTAGES BEING BASED ON THE TOTAL WEIGHT OF POLYMER; B. 0.5 TO 10% BY WEIGHT, BASED ON THE WEIGHT OF POLYMER, OF A TITANIUM CHELATE CATALYST; AND C. AN AQUEOUS SOLVENT OR AQUEOUS DISPERSANT WHEREIN SAID COATINGS COMPOSITION HAS A TOTAL SOLIDS CONTENT OF 25 TO 80% BY WEIGHT.

Claim 6

A POLYMER WHICH HAS SUFFICIENT ACID CONTENT TO BE WATER SOLUBLE OR WATER DISPERSIBLE WHEN SALTED WITH AN INORGANIC OR ORGANIC BASE, SAID POLYMER HAVING AN ACID VALUE OF AT LEAST 20 AND WHICH CONTAINS 10 TO 95% BY WEIGHT OF THE HYDROXYALKYL ACRYLATE OR METHACRYALTE, 5 TO 25% BY WEIGHT OF A POLYMERIZABLE ETHYLENICALLY UNSATURATED ACID OR A CARBOXYLIC ACID CONTAINING MERCAPTAN OR MIXTURE THEREOF AND 0 TO 85% BY WEIGHT OF A MONOMER COPOLYMERIZABLE THEREWITH, SAID WEIGHT PERCENTAGES BEING BASED ON THE TOTAL WEIGHT OF POLYMER; B. 0.5 TO 10% BY WEIGHT, BASED ON THE WEIGHT OF POLYMER, OF A TITANIUM CHELATE CATALYST; AND C. AN AQUEOUS SOLVENT OR AQUEOUS DISPERSANT WHEREIN SAID COATINGS COMPOSITION HAS A TOTAL SOLIDS CONTENT OF 25 TO 80% BY WEIGHT.

Claim 7

a polymer which has sufficient acid content to be water soluble or water dispersible when salted with an inorganic or organic base, said polymer having an acid value of at least 20 and which contains 10 to 95% by weight of the hydroxyalkyl acrylate or methacrylate, 5 to 25% by weight of a polymerizable ethylenically unsaturated acid or a carboxylic acid containing mercaptan or mixture thereof and 0 to 85% by weight of a monomer copolymerizable therewith, said weight percentages being based on the total weight of polymer; B. 0.5 to 10% by weight, based on the weight of polymer, of a titanium chelate catalyst; and C. an aqueous solvent or aqueous dispersant wherein said coatings composition has a total solids content of 25 to 80% by weight.

Claim 8

a polymer which has sufficient acid content to be water soluble or water dispersible when salted with an inorganic or organic base, said polymer having an acid value of at least 20 and which contains 10 to 95% by weight of the hydroxyalkyl acrylate or methacrylate, 5 to 25% by weight of a polymerizable ethylenically unsaturated acid or a carboxylic acid containing mercaptan or mixture thereof and 0 to 85% by weight of a monomer copolymerizable therewith, said weight percentages being based on the total weight of polymer; B. 0.5 to 10% by weight, based on the weight of polymer, of a titanium chelate catalyst; and C. an aqueous solvent or aqueous dispersant wherein said coatings composition has a total solids content of 25 to 80% by weight.

Claim 9

The composition of claim 1 wherein the other monomer copolymerizable therewith is an alkyl acrylate or methacrylate wherein the alkyl group is derived from a monohydric alcohol which contains 1 to 5 carbon atoms.

Claim 10

The composition of claim 2 wherein the polymer contains 10 to 60% by weight hydroxyalkyl acrylate or methacrylate, and at least one mol of the alkyl acrylate or methacrylate per mol of hydroxyalkyl acrylate or methacrylate.

Claim 11

The composition of claim 3 wherein the hydroxyalkyl acrylate is hydroxyethyl acrylate or hydroxypropyl acrylate and wherein the alkyl acrylate is methyl acrylate or ethyl acrylate.

Claim 12

The composition of claim 1 wherein the titanium chelate is triethanol amine titanate.

Claim 13

The composition of claim 1 wherein the weight average molecular weight of the inherently water soluble polymer is less than 5,000.

Claim 14

A PROCESS FOR FORMING A THERMOSET COATING ON A SUBSTRATE WHICH COMPRISES A. APPLYING TO A SUBSTRATE AND COATING COMPOSITION OF CLAIM 1; AND B. HEATING THE COATING AT A TEMPERATURE OF AT LEAST 250*F. FOR A TIME SUFFICIENT TO DRY THE COATING AND TO CROSSLINK IT BY ESTER INTERCHANGE BETWEEN THE ESTER GROUPS IN THE POLYMER.