Polyvinyl acetate dispersion and method of making utilizing polyacrylic acid and monomer soluble and monomer insoluble catalyst

Claim 1

THE METHOD OF MAKING A SMOOTH, STABLE, SPRAYABLE AQUEOUS EMULSION OF A VINYL POLYMER OF MONOMERS INCLUDING AT LEAST A PREDOMINANT PROPORTION OF A VINYL ESTER OF A SHORT-CHAIN FATTY ACID HAVING 2-3 CARBON ATOMS CAPABLE OF FORMING A WATER-INSOLUBLE FILM AS HEREIN DESCRIBED WHEN DRIED IN THIN FILM FORM AT NORMAL ROOM TEMPERATURES, SAID METHOD COMPRISING HEATING AT A TEMPERATURE ABOVE ABOUT 45* C. AND BELOW THE BOILING POINT, A DISPERSION OF 100 PARTS BY WEIGHT OF VINYL ACETATE MONOMER IN AN AQUEOUS SOLUTION OF SOLUTES COMPRISING ABOUT 2-5 PARTS OF POLYMERIZED ACRYLIC ACID, SAID DISPERSION BEING ADJUSTED TO A PH OF AT LEAST ABOUT 3.5 AND NOT HIGHER THAN ABOUT 4.5 AND CONTAINING POLYMERIZATION CATALYSTS COMPRISING A PEROXIDE CATALYST SOLUBLE IN SAID MONOMER AND A WATER-SOLUBLE PERSULFATE CATALYST WHICH IS INSOLUBLE IN SAID MONOMER, IN A RATIO WITHIN THE RANGE OF ABOUT 1:1 TO ABOUT 10:1.

Claim 2

THE METHOD OF MAKING A SMOOTH, STABLE, SPRAYABLE AQUEOUS EMULSION OF A VINYL POLYMER OF MONOMERS INCLUDING AT LEAST A PREDOMINANT PROPORTION OF A VINYL ESTER OF A SHORT-CHAIN FATTY ACID HAVING 2-3 CARBON ATOMS CAPABLE OF FORMING A WATER-INSOLUBLE FILM AS HEREIN DESCRIBED WHEN DRIED IN THIN FILM FORM AT NORMAL ROOM TEMPERATURES, SAID METHOD COMPRISING HEATING AT A TEMPERATURE ABOVE ABOUT 45* C. AND BELOW THE BOILING POINT, A DISPERSION OF 100 PARTS BY WEIGHT OF VINYL ACETATE MONOMER IN AN AQUEOUS SOLUTION OF SOLUTES COMPRISING ABOUT 2-5 PARTS OF POLYMERIZED ACRYLIC ACID, SAID DISPERSION BEING ADJUSTED TO A PH OF AT LEAST ABOUT 3.5 AND NOT HIGHER THAN ABOUT 4.5 AND CONTAINING POLYMERIZATION CATALYSTS COMPRISING A PEROXIDE CATALYST SOLUBLE IN SAID MONOMER AND A WATER-SOLUBLE PERSULFATE CATALYST WHICH IS INSOLUBLE IN SAID MONOMER, IN A RATIO WITHIN THE RANGE OF ABOUT 1:1 TO ABOUT 10:1.