Process for coagulating polymer lattices prepared in a true aqueous emulsion

Claim 1

A PROCESS FOR COAGULATING A STABLE LATEX OF A VINYL CHLORIDE POLYMER WHICH LATEX HAS A PH OF AT LEAST 7 AND HAS BEEN PREPARED BY POLYMERIZING THE SAID VINYL CHLORIDE IN A TRUE AQUEOUS EMULSION CONTAINING WATER, THE VINYL CHLORIDE AND, AS THE SOLE EMULSIFYING AGENT, FROM 0.5% TO 5% BY WEIGHT BASED ON THE WATER OF AN IONIC SURFACE ACTIVE AGENT WHICH IS ORGANIC SOLVENT STABLE AND ALKALI STABLE, WHICH COMPRISES ADDING TO THE SAID LATEX A COAGULATING AGENT OF THE GROUP CONSISTING OF ALCOHOLS CONTAINING FROM 3 TO 12 CARBON ATOMS, MIXTURES OF THE SAID ALCOHOLS WITH KETONES CONTAINING FROM 3 TO 12 CARBON ATOMS, AND MIXTURES OF THE SAID ALCOHOLS WITH LIQUID HYDROCARBONS WHEREIN THE SAID COAGULATING AGENT IS A LIQUID AT THE COAGULATING TEMPERATURE AND HAS A SOLUBILITY IN WATER AT THE COAGULATING TEMPERATURE VARYING FROM THE SOLUBILITY OF DIAMYL ETHER TO THE SOLUBILITY OF METHYL ETHYL KETONE AT THE COAGULATING TEMPERATURE AND THE SOLUBILITY OF THE POLYMER IN THE SAID COAGULATING AGENT AT THE COAGULATING TEMPERATURE DOES NOT EXCEED THAT OF THE SOLUBILITY OF THE POLYMER IN METHYL ETHYL KETONE AT THE COAGULATING TEMPERATURE, IN AN AMOUNT WHICH IS SUFFICIENT TO FORM A SEPARATING ORGANIC PHASE AND HEATING THE MIXTURE OF AQUEOUS DISPERSION AND ADDED COAGULATING AGENT AT A TEMPERATURE AT LEAST ABOUT 50* C. TO BRING ABOUT THE COAGULATION OF THE DISPERSED POLYMER.