IMPACT MODIFIER COMPOSITIONS FOR RIGID PVC COMPOSITIONS OF HYDROCARBON RUBBERS AND CHLORINATED POLYETHYLENE

摘要

The present invention is specifically directed to improved polyvinyl chloridecompositions having excellent impact strength. In particular, the impactresistant composition comprises a vinyl chloride polymer and 2-8 parts of animpact modifier composition comprising at least one ethylene/alpha-olefincopolymer and at least one chlorinated olefin polymer per 100 parts of thevinyl chloride polymer. Preferably the impact modifier composition comprisesless than 1 part of the ethylene/alpha-olefin copolymer and the ratio of saidcopolymer to the total modifier composition is less than 25%.