Vinylidene and vinyl chloride copolymer

Claim 2

IN A PROCESS FOR PROCUCTION OF A COPOLYMER OF VINYLIDENE CHLORIDE AND VINYL CHLORIDE OF SUBSTANTIALLY HOMOGENEOUS COMPOSITION WHEREIN A MIXTURE CONTAINING 60 TO 40% OF MONOMERIC VINYLIDENE CHLORIDE AND 40 TO 60% OF MONOMERIC VINYL CHLORIDE IS SUBJECTED TO POLYMERIZING CONDITIONS IN AQUEOUS EMULSION, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE POLYMERIZATION AT A TEMPERAATURE BETWEEN 20 AND 40 * C. AND AT A PRESSURE MAINTAINED BETWEEFN 27 TO 30 P.S.I.G. WHILE CONTINOUSLY ADDING ONLY VINYLIDENE CHLORIDE FROM WHICH THE DISSOLVED GASES ARE REMOVED PRIOR TO ITS INTRODUCTION INTO THE POLYMERIZATION VESSEL TO MAINTAIN THE PRESSURE CONSTANT AND TO MAINTAIN THE RATIO OF VINYLIDENE CHLORIDE MONOMER TO VINYL CHLORIDE MONOMER CONSTANT AND STOPPING THE POLYMERIZATION AFTER AT LEAST 80% OF THE MONOMERS HAVE BEEN POLYMERIZED.

Claim 3

A COMPOSITION OF MATTER CONTAINING 6 TO 10% OF DIBUTYL SEBACATE AND A COPOLYMER OF VINYLIDENE CHLORIDE AND VINYL CHLORIDE PREPARED BY SUBJECTING A MIXTURE CONTAINING 60 TO 40% OF MONOMERIC VINYLIDENE CHLORIDE AND 40 TO 60% OF MONOMERIC VINYL CHLORIDE TO POLYMERIZING CONDITIONS IN AQUEOUS EMULSION, SAID POLYMERIZATION HAVING BEEN CARRIED OUT AT A TEMPERATURE BETWEEN 20 AND 40* C.AND AT A PRESSURE MAINTAINED BETWEEN 27 AND 30 P.S.I.G. WHILE CONTINOUSLY ADDING ONLY VINYL CHLORIDE FROM WHICH THE DISSOLVED GASES WERE REMOVED PRIOR TO ITS INTRODUCTION INTO THE POLYMERIZATION VESSEL TO MAINTAIN THE PRESSURE CONSTANT AND TO MAINTAIN THE RATIO OF VINYLIDENE CHLORIDE MONOMER TO VINYL CHLORIDE MONOMER CONSTANT AND STOPPING THE POLYMERIZATION AFTER AT LEAST 80% OF THE MONOMERS HAVE BEEN POLYMERIZED, SAID COPOLYMER HAVING A MELTING POINT OF 118 TO 122* C.,SAID COMPOSITION BEING CHARACTERIZED BY THE PROPERTY THAT IT CAN BE FORMED INTO FILM HAVING A TENSILE STRENGTH OF 10,000 TO 12,000 P.S.I., A CLARITY OF 1 TO 3% HAZE, A HEAT SHRINKAGE OF 50 TO 70% AT 205*F. AND A 10*F. MODOLUS OF 100,000 TO 300,000.

Claim 4

A COMPOSITION OF MATTER CONTAINING 6 TO 10% OF DIBUTYL SEBACATE AND A COPOLYMER OF VINYLIDENE CHLORIDE AND VINYL CHLORIDE PREPARED BY SUBJECTING A MIXTURE CONTAINING 60 TO 40% OF MONOMERIC VINYLIDENE CHLORIDE AND 40 TO 60% OF MONOMERIC VINYL CHLORIDE TO POLYMERIZING CONDITIONS IN AQUEOUS EMULSION, SAID POLYMERIZATION HAVING BEEN CARRIED OUT AT A TEMPERATURE BETWEEN 20 AND 40* C.AND AT A PRESSURE MAINTAINED BETWEEN 27 AND 30 P.S.I.G. WHILE CONTINOUSLY ADDING ONLY VINYL CHLORIDE FROM WHICH THE DISSOLVED GASES WERE REMOVED PRIOR TO ITS INTRODUCTION INTO THE POLYMERIZATION VESSEL TO MAINTAIN THE PRESSURE CONSTANT AND TO MAINTAIN THE RATIO OF VINYLIDENE CHLORIDE MONOMER TO VINYL CHLORIDE MONOMER CONSTANT AND STOPPING THE POLYMERIZATION AFTER AT LEAST 80% OF THE MONOMERS HAVE BEEN POLYMERIZED, SAID COPOLYMER HAVING A MELTING POINT OF 118 TO 122* C.,SAID COMPOSITION BEING CHARACTERIZED BY THE PROPERTY THAT IT CAN BE FORMED INTO FILM HAVING A TENSILE STRENGTH OF 10,000 TO 12,000 P.S.I., A CLARITY OF 1 TO 3% HAZE, A HEAT SHRINKAGE OF 50 TO 70% AT 205*F. AND A 10*F. MODOLUS OF 100,000 TO 300,000.