Vinyl acetate polymer latices, process for preparing same and paint compositions made therefrom

Claim 1

A PROCESS FOR PREPARING A VINYL ACETATE POLYMER LATEX WHICH COMPRISES SUBJECTING TO POLYMERIZING TEMPERATURE OF 120*F. TO 200*F. 100 PARTS OF POLYMERIZABLE MATERIAL SELECTED FROM THE GROUP CONSISTING OF VINYL ACETATE AND MIXTURE OF VINYL ACETATE WITH UP TO 40% OF SAID MIXTURE OF MATERIAL COPOLYMERIZABLE WITH VINYL ACETATE SELECTED FROM THE GROUP CONSISTING OF DIALKYL MALEATES AND DIALKYL FUMARATES HAVING TWO TO EIGHT CARBON ATOMS IN THE ALKYL RADICALS, VINYL ESTERS OF ALKANOIC ACIDS HAVING THREE TO EIGHT CARBON ATOMS IN THE ALKANOATE GROUP, AND ALKYL ESTERS OF ACRYLIC AND METHACRYLIC ACIDS HAVING ONE TO EIGHTEEN CARBON ATOMS IN THE ALKYL ESTERIFYING RADICAL, IN 60 TO 120 PARTS OF WATER CONTAINING 0.05 TO 0.75 PART OF ALKALI PERSULFATE, AND 1 TO 10 PARTS OF A POLYOXYETHYLENE-POLYOXYPROPYLENE GLYCOL IN WHICH THE POLYOXYPROPYLENE CHAIN HAS A MOLECULAR WEIGHT FROM 1500 TO 1800 AND THE POLYOXYETHYLENE CONTENT IS FROM 80 TO 90 PERCENT BY WEIGHT OF THE TOTAL MOLECULE.