Polymerizing vinyl acetate in granular form

Claim 1

A PROCESS OF PREPARING POLYVINYL ACETATE IN GRANULAR FORM WHICH COMPRISES (A) DISPERSING VINYL ACETATE IN AN AQUEOUS MEDIUM CONTAINING, (1) AS EMULSIFYING AGENT, A MATERIAL OF THE GROUP CONSISTING OF (A) A POLYVINYL ALCOHOL THAT IS DERIVED FROM POLYVINYL ACETATE HAVING A VISCOSITY OF ABOUT 600-800 CENTIPOISES AT 20*C. IN A MOLAR BENZENE SOLUTION AND CONTAINS 15-30% ACETATE GROUPS BY WEIGHT CALCULATED AS POLYVINYL ACETATE; (B) A POLYVINYL ALCOHOL THAT IS DERIVED FROM POLYVINYL ACETATE HAVING A VISCOSITY OF 2-15 CENTIPOISES AT 20*C. IN A MOLAR BENZENE SOLUTION AND CONTAINS 30-45% ACETATE GROUPS BY WEIGHT CALCULATED AS POLYVINYL ACETATE, (C) A MIXTURE OF TWO POLYVINYL ALCOHOLS, ONE OF WHICH IS DERIVED FROM POLYVINYL ACETATE HAVING AVISCOSITY OF 40-80 CENTIPOISES AT 20*C. IN A MOLAR BENZENE SOLUTION AND CONTAINS 5-10% ACETATE GROUPS BY WEIGHT CALCULATED AS POLYVINYL ACETATE AND THE OTHER IS DERIVED FROM POLYVINYL ACETATE HAVING A VISCOSITY OF 2-15 CENTIPOISES AT 20*C. IN A MOLAR BENZENE SOLUTION AND CONTAINS 20-50% ACETATE GROUPS BY WEIGHT CALCULATED AS POLYVINYL ACETATE, (2) A PEROXIDE POLYMERIZATION CATALYST, AND (3) 0.05% TO 1.0%, BY WEIGHT OF THE TOTAL DISPERSION OF VINYL ACETATE AND AQUEOUS MEDIUM, OF A DISPERSING AGENT OF THE GROUP OF DISPERSING AGENTS MADE BY CONDENSING SULFONIC ACIDS OF AROMATIC HYDROCARBONS WITH FORMALDEHYDE AND NEUTRALIZING TO OBTAIN A SALT, SAID DISPERSING AGENT BEING ONE WHOSE 1% AQUEOUS SOLUTION HAS A SURFACE TENSION OF NOT LESS THAN ABOUT 50 DYNES/CM. AT 25*C., (B) HEATING AND AGITATING THE RESULTING MIXTURE TO POLYMERIZE THE VINYL ACETATE, AND (C) RECOVERING THE RESULTING GRANUALR POLYVINYL ACETATE.