Aqueous self-curing polymeric blends

In a process for producing an organic coating composition comprising the process steps of:

• polymerizing in water a monomer mixture comprising ethylenically unsaturated monomers comprising (a) alkylol acrylamide monomer, (b) ethylenically unsaturated functional monomer containing reactive functional groups selected from carboxyl, hydroxyl, amine, or amide functional monomers, and (c) other ethylenically unsaturated monomer to provide a self-curing water dispersed polymer;
• and
• mixing said self-curing water dispersed polymer with an epoxy-acrylic graft copolymer and a phosphated polymer to provide a water-dispersed composition of a blend of polymers comprising between 1% and 99% of said self-curing polymer, between 1% and 70% of said epoxy-acrylic graft copolymer, and 0% to 50% phosphated polymer.

The process in claim 47 wherein a portion of the functional groups on said functional monomer reacts with a portion of the functional groups on said alkylol acrylamide monomer.

In a process for producing an organic coating composition, comprising the steps of:

• providing a mixture comprising on a weight basis between 40% and 90% of a self-curing latex polymer between 1% and 30% of epoxy-acrylic copolymer mixture comprising epoxy resin, epoxy-acrylic graft copolymer, and ungrafted addition polymer, and between 0% and 30% epoxy phosphate resin;
• wherein the self-curing latex polymer is produced by polymerizing monomers comprising (a) alkylol acrylamide monomer, (b) functional monomer containing reactive functional groups selected from carboxyl, hydroxyl, amine, or amide functional monomers, and (c) other ethylenic monomer in a two-step process by first copolymerizing first stage monomer and then copolymerizing second stage mononer, wherein said alkylol acrylamide is a second stage monomer copolymerized in the second step to preferentially orientate alkylol acrylamide groups of said alkylol acrylamide monomer on the surface portion of the latex polymer particles, whereby said latex can be heat cured and self cross-linking by cross-linking said alkylol acrylamide groups with said functional groups.

In a process for producing an organic coating composition comprising the process steps of:

• polymerizing in water a monomer mixture comprising ethylenically unsaturated monomers comprising (a) alkyl modified acrylamide monomer derived from alkylol acrylamide monomer, (b) ethylenically unsaturated functional monomer containing reactive functional groups selected from carboxyl, hydroxyl, amine, or amide functional monomers, and (c) other ethylenically unsaturated monomer to provide a self-curing water dispersed polymer;
• and
• mixing said self-curing water dispersed polymer with an epoxy-acrylic graft copolymer and a phosphated polymer to provide a water-dispersed composition of a blend of polymers comprising between 1% and 99% of said self-curing polymer, between 1% and 70% of said epoxy-acrylic graft copolymer, and 0% to 50% phosphated polymer.