Blends comprising polyvinyl chloride, polymethyl methacrylate and a stabilizer

Claim 1

A STABLE HOMOGENOUS BLEND CONSISTING ESSENTIALLY OF POLYVINYL CHLORIDE, AND AT LEAST ONE ACRYLIC RESIN OF THE CLASS CONSISTING OF COPOLYMERS OF METHY METHACRYLATE AND LOWER ALKYL ACRYLATES AND METHYL METHOCRYLATE HOMOPOLYMER, SAID ACRYLIC RESIN HAVING AN INTERREST VISOSITY OF 0.3 TO 0.6, WHEN SAID ACRYLIC RESIN IS A COPODYMEN, THE AMOUNT OF LOWER ALKYL ACRYLATE IN SAID COPOLYMER BEING 0.02 TO 25% BY WEIGHT OF THE COPOLYMER, THE AMOUNT OF POLYVINYL CHLORIDE IN SAID BLEND BEING FROM 50 TO 80 PARTS BY WEIGHT PER 100 PARTS OF RESIN, THE AMOUNT OF ACRYLIC RESIN IN SAID BLEND BEING FROM 20 TO 50 PARTS BY WEIGHT PER 100 PARTS OF RESIN, WHEN SAID ACRYLIC RESIN CONTAINS LESS THAN ABOUT 5% LOWER ALKYL ACRYLATES, SAID ACRYLIC RESIN CONTAINING AT LEAST ONE BIVALENT SULFER COMPOUND HAVING THE FORMULA R1-S-R2 WHERE R1 IS AN ORGANIC RADICAL CONTAINING 1 TO 20 CARBON ATOMS AND R2 IS SELECTED FROM CLASS CONSISTING OF HYDROGEN AND ORGANIC RADICALS HAVING 1 TO 20 CARBON ATOMS, SAID BIVALENT SULFUR COMPOUND BEING PRESENT IN SAID ACRYLIC RESIN IN AN AMOUNT SUCH THAT THE SULFUR CONTENT OF SAID ACRYLIC RESIN IS .1 TO 2% BY WEIGHT OF THE ACRYLIC RESIN, SAID BEING STABILIZED WITH AT LEAST ONE DEHYDROCHLORINATION INHIBITOR SELECTED FROM THE CLASS CONSISTING OF DIALKYL TIN MERCAPTIDES, DIALKYL TIN CARBOXYLATES, AND DIALKYL TIN ALKOXIDES, HAVING 1 TO 10 CARBON ATOMS IN EACH ALKYL GROUP, FATTY ACID SALT OF A METAL OF THE CLASS CONSISTING OF ZINC, LEAD CADMIUM, AND STRONTIUM HAVING 7 TO 24 CARBON ATOMS, BARIUM PHENOLATES, DIALKYL ZINC MERCAPTIDES HAVING 1 TO 10 CARBON ATOMS IN EACH ALKYL GROUP, EPOXIDIZED OILS HAVING 10 TO 100 CARBON ATOMS AND AN OXIRANE OXYGEN CONTENT 5 TO 10% BY WEIGHT OF THE OIL, DIGLYCIDYL ETHERS OF POLYHYDRIC PHENOLS HAVING 17 TO 50 CARBON ATOMS, 3:4 EPOXY 6-METHYI-CYCLOHEXYL METHYL 3:4 EPOXY 6-METHYL CYCLOHEXANE CARBOXYLATE, ALKYL PHOSPHIES HAVING 1-20 CARBON ATOMS AND TRIPHENYL PHOSPHITE, IN THE AMOUNT OF .5 TO 4% BY WEIGHT OF THE BLEND, SAID BLEND HAVING A VISCOSITY RANGE OF 10,000 TO 50,000 POISES AT 180*C. AT A SHEAR RATE OF 100 SEC.**1 AND A VISCOSITY RANGE OF 3,000 TO 8,000 POISES AT 180*C. AT A SHEAR RATE OF 1,000 SEC.**1.