Polymerization inhibiting mixture of phenol and chlorine compound

Claim 1

A PROCESS FOR EXTENDING THE USEFUL FILM-FORMING LIFE OF AN EMULSION POLYMERIZATE COMPOSED PREDOMINANTLY OF A NORMALLY CRYSTALLINE VINYLIDENE CHLORIDE POLYMER WHICH EMULSION POLYMERIZATE NORMALLY IS CAPABLE OF DEPOSITING CONTINUOUS, COHERENT FILMS WHEN FRESH AND LOSES THAT ABILITY ON AGING, WHICH COMPRISES (1) PREPARING AN AQUEOUS LATEX BY EMULSION POLYMERIZATION OF A MONOMERIC MIXTURE OF VINYLIDENE CHLORIDE AND A POLYMERIZABLE COMONOMER, AND (2) TERMINATING THE POLYMERIZATION BETWEEN ABOUT 55 AND 90 PERCENT CONVERSION OF MONOMER TO POLYMER, BY ADDING TO THE EMULSION POLYMERIZATE LESS THAN ABOUT 1 WEIGHT PERCENT BASED ON THE POLYMER SOLIDS OF SAID EMULSION POLYMERIZATE OF A POLYMERIZATION INHIBITING AGENT CONSISTING ESSENTIALLY OF AN ADMIXTURE OF (A) BETWEEN ABOUT 0.00U AND ABOUT 0.015 WEIGHT PERCENT OF AT LEAST ONE COMPOUND SELEC TED FROM THE GROUP CONSISTING OF CHLORINE DIOXIDE AND ALKALI METAL CHLORITES, AND (B) AT LEAST ABOUT 0.02 WEIGHT PERCENT OF AT LEAST ONE PHENOLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHENOL, PARAMETHOXPHENOL AND HYDROQUINONE.