Rigid shock-resistant vinyl halide polymer compositions

Claim 1

AN IMPROVED, SHOCK-RESISTANT, PROCESSABLE, RIGID, THERMOPLASTIC COMPOSITION COMPRISING AN INTIMATE MIXTURE OF (1) A RIGID VINYL HALIDE POLYMER OF A MONOMER MIXTURE COMPRISED PREDOMINATELY OF A VINYL HALIDE AND LESSER AMOUNTS OF OTHER MONOOLEFINIC MONOMERS, (2) A HARD, TOUGH, RESINOUS POLYMER OF A PREDOMINATELY MONOOLEFINIC MIXTURE COMPRISING 50 TO 90 WEIGHT PERCENT OF A MONOMER SELECTED FROM THE CLASS CONSISTING OF STYRENE, ALKYL STYRENES, HALOSTYRENES AND ALKOXYSTYRENES AND 10 TO 50 WEIGHT PERCENT OF A MONOMER SELECTED FROM THE CLASS CONSISTING OF ACRYLONITRILE, METHACRYLONITRILE AND CHLOROACRYLONITRILE, (3) A RUBBERY INTERPOLYMER OF A MONOMER MIXTURE COMPRISING 50 TO 90 WEIGHT PERCENT OF A 1,3BUTADIENE HYDROCARBON, 5 TO 30 WEIGHT PERCENT OF AN ACRYLONITRILE AND 5 TO 30 WEIGHT PERCENT OF AT LEAST ONE OTHER MONOOLEFINIC MONOMER COPOLYMERIZABLE WITH THE 1,3-BUTADIENE HYDROCARBON AND THE ACRYLONITRILE, AND (4) INORGANIC WATER-INSOLUBLE POLYVALENT METAL COMPOUNDS, SAID METAL SELECTED FROM GROUPS IV AND VIII OF THE PERIODIC TABLE, AND SAID COMPOSITION CONTAINING ESSENTIALLY FROM 1 TO 40 WEIGHT PARTS OF (2) BASED ON 100 WEIGHT PARTS OF (1), 1 TO 30 WEIGHT PARTS OF (3) BASED ON 100 WEIGHT PARTS OF (1) AND (2), AND 5 TO 40 WEIGHT PARTS OF (4) BASED ON 100 WEIGHT PARTS OF (1), (2) AND (3).