Uniform ethylene/vinyl acetate/n-methylol acrylamide terpolymer dispersions

Abstract

Abstract A UNIFORM ETHYLENE/VINYL/N-METHYLOL ACRYLAMIDE TERPOLYMER IS PROVIDED. A LATEX COATING COMPOSITION COMPRISING AN AQUEOUS MEDIUM HAVING THE TERPOLYMER COLLOIDALLY SUSPENDED THEREIN IS PROVIDED. A COATED TEXTILE FABRIC HAVING A COATING COMPRISING THE TERPOLYMER IS PROVIDED. AND AN IMPROVEMENT IN THE PROCESS FOR PREPARING AN ETHYLEN/VINYL ACETATE-N-METHYLOL ACRYLAMIDE TERPOLYMER WHEREIN THE MONOMERS ARE COPOLYMERIZED IN AN AQUEOUS DISPERSION SYSTEM UNDER ETHYLENE PRESSURE IS PROVIDED. THE IMPROVEMENT COMPRISES MAINTAINING THE LEVEL OF UNREACTED VINYL ACETATE MONOMER IN THE AQUEOUS DISPERSION SYSTEM AT ABOUT 5-25 WEIGHT PERCENT BASED ON THE TOTAL WEIGHT OF THE SYSTEM AT A GIVEN TIME DURING A SUBSTANTIAL PORTION OF THE POLYMERIZATION, CONTINUOUSLY ADDING N-METHYLOL ACRYAMIDE AND VINYL ACETATE TO THE AQUEOUS DISPERSION SYSTEM IN A SUBSTANTIALLY CONSTANT RATIO AND AT A RATE SUBSTANTIALLY THE SAME AS THE RATE OF POLYMERIZATION AND CONTINUOUSLY ADDING N-METHYLOL ACRYLAMIDE AFTER COMPLETION OF VINYL ACETATE ADDITION IN ORDER TO FORM A TERPOLYMER HAVING A UNIFORM DISTRIBUTION OF THE NMETHYLOL ACRYLAMIDE. THE TERPOLYMER FORMED BY THE PROCESS OF THIS INVENTION HAS IMPROVED CURABILITY OVER PRIOR ART ETHYLENE/VINYL ACETATE/N-METHYLOL ACRYLAMIDE TERPOLYMERS AND ACCORDINGLY, PROVIDES SUPERIOR COATINGS FOR TEXTILE SUCH AS WOVEN FABRICS.

Inventors

• 👤 Aleksander Beresniewicz

Bibliographic Details