Aqueous self-curing polymeric blends

Claim 2

A water dispersed coating composition comprising on a polymer solids weight basis: between 5% and 99% of a self-curing water dispersed polymer comprising copolymerized ethylenically unsaturated alkylol acrylamide monomer, ethylenically unsaturated functional monomer containing reactive functional groups, and other ethylenically unsaturated monomer; between 1% and 70% epoxy-acrylic copolymer; and between 0% and 50% of a phosphated polymer.

Claim 3

A composition as claimed in claim 1, characterized in that said phosphated polymer is present in an amount of from 3 to 20% on a polymer solids weight basis.

Claim 4

A composition as claimed in either of the preceding claims, wherein the composition further comprises from 1 to 10% of an aminoplast resin on a polymer solids weight basis.

Claim 5

A composition as claimed in any one of the preceding claims, wherein the alkylol acrylamide component of the self curing water dispersed polymer is an alkylated alkylol acrylamide.

Claim 6

A composition according to any one of the preceding claims, wherein said functional monomer contains carboxyl, hydroxy, amino or amido groups.

Claim 7

A composition according to any one of the preceding claims, wherein the epoxy acrylic copolymer is a graft copolymer, in admixture with ungrafted polymer. epoxy resin and ungrafted acrylic admixture polymer.

Claim 8

A composition according to any one of the preceding claims, wherein said epoxy acrylic is a phosphated epoxy-acrylic polymer.

Claim 9

A composition according to any one of the preceding claims, wherein said epoxy acrylic copolymer is an epoxy acrylic ester copolymer.

Claim 10

A copolymer according to any one of the preceding claims, wherein said self curing-water dispersed polymer. was formed by copolymerization of its constituent unit in the presence of a phosphate or phosphoric acid.

Claim 11

A composition according to any one of the preceding claims, wherein a phosphated polymer is present and said phosphated polymer comprises an epoxy phosphate.

Claim 12

A composition according to any one of the preceding claims, wherein a phosphated polymer is present and is selected from a) phosphated resinous polyelectrolyte polymers produced by reacting ethylenically unsaturated monomers including carboxyl or hydroxyl monomer in water containing an ionizing agent, b) phosphated epoxidized oil c) phosphated epoxidized butadiene copolymer, d) polymer containing copolymerized phosphate monomer, e) phosphated polyester.

Claim 13

, A water dispersed coating composition containing a water dispersed self-curing polymer comprising copolymerized ethylenically unsaturated alkylol acrylamide monomer, ethylenically unsaturated functional monomer containing reactive functional groups, and other ethylenically unsaturated monomer, wherein the self-curing polymer contains phosphate.

Claim 14

, A water dispersed coating composition containing a water dispersed self-curing polymer comprising copolymerized ethylenically unsaturated alkylol acrylamide monomer, ethylenically unsaturated functional monomer containing reactive functional groups, and other ethylenically unsaturated monomer, wherein the self-curing polymer contains phosphate.

Claim 15

The composition in claim 12, wherein the phosphate is an alkyl phosphate ester monomer copolymerized with the other monomers.

Claim 16

A process for preparing a copolymer as claimed in any one of claims 1-10, which comprises polymerizing in water a monomer mixture comprising ethylenically unsaturated alkylol acrylamide monomer, ethylenically unsaturated functional monomer containing reactive functional groups, and other ethylenically unsaturated monomer to provide a self-curing water dispersed polymer; and mixing said self-curing water dispersed polymer with an epoxy-acrylic copolymer and optionally phosphated polymer to provide a water dispersed composition comprising between 1% and 99% of.said self-curing polymer, between 1% and 70% of said epoxy-acrylic copolymer, and 0% to 50% phosphated polymer.

Claim 17

A process according to claim 14, wherein the monomers for the self-curing polymers are polymerized in the presence of ionizing agent to produce a resinous polyelectrolyte water dispersed self-curing polymer.

Claim 18

A process according to either claim 14 or 15, wherein the alkylol acrylamide monomer is preferentially copolymerized on the surface portion of the self-curing water dispersed polymer.

Claim 19

A process according to any one of claims 14, 15 and 16 wherever the monomers are phosphated in the presence of a phosphate-surfactant.

Claim 20

The use of a composition according to any one of claims 1-13, which comprises spraying an application of said composition to a substrate and then heat curing to cross-link said functional groups with said alkylated acrylamide groups.

Claim 21

A composition according to any one of claims 1-6 wherein said epoxy'acrylic copolymer is quaternary- polymer.

Claim 22

A composition according to anyone of claims 1-6 wherein said epoxy acrylic copolymer is produced by reaction epoxy resin with a melamine graft copolymer mixture of melamine and acrylic copolymer in the presence of sufficient amine to produce a non-gelled epoxy-acrylic ester copolymer.