Vinyl resin plasticized with liquid copolymer of diolefin and nitrile

Claim 1

A COMPOSITION OF MATTER COMPRISING A MAJOR PROPORTION OF A RESIN SELECTED FROM THE GROUP CONSISTING OF POLYVINYL CHLORIDE, POLYVINYLIDENE CHLORIDE, VINYL CHLORIDE-VINYLIDENE CHLORIDE COPOLYMERS AND VINYL CHLORIDE-VINYL ACETATE COPOLYMERS, AND A MINOR PROPORTION OF A LIQUID, OILY COPOLYMER HAVING AN INTRINSIC VISCOSITY IN THE RANGE OF 0.05 TO 0.4, AND PREPARED BY POLYMERIZING AT A TEMPERATURE BETWEEN 10* C. AND 35* C. A MIXTURE OF A MAJOR PROPORTION OF A CONJUGATED DIOLEFIN OF FROM 4 TO 6 CARBON ATOMS PER MOLECULE AND A MINOR PROPORTION OF A NITRILE SELECTED FROM A GROUP CONSISTING OA CARYLONITRILE AND METHACRYLONITRILE IN AQUEOUS EMULSION IN THE PRESENCE OF FT LEAST 3 AND UP TO ABOUT 12 WEIGHT PERCENT, BASED ON THE MONOMERS, OF AN ALIPHATIC MERCAPTAN OF FROM 6 TO 16 CARBON ATOMS, AND CARRYING THE CONVERSION TO ABOUT 80 TO 90% OF THE MONOMERS, THE AMOUNT OF SAID LIQUID, OILY COPOLYMER PRESENT BEING SUFFICIENT TO EXERT A SUBSTANTIAL PLASTICIZING EFFECT UPON THE RESIN, AND SAID LIQUID, OILY COPOLYMER CONTAINING NO RUBBER-LIKE CONSTITUENTS AND HAVING NO RUBBER-LIKE PROPERTIES.