Patent ID: 6048932
Filing Date: 2000-04-11
Classification: C08L

Abstract:
An impact resistant polystyrene composition which comprises:5 to 97% by weight of (a) a styrenic polymer having syndiotactic configuration selected from the group consisting of polystyrene, poly(alkylstyrene), poly(halogenated styrene), poly(halogenated alkylstyrene), poly(alkoxystyrene), poly(vinyl benzoate) and hydrogenated polymers thereof;2 to 95% by weight of (b) at least one rubber selected from the group consisting of polyolefin, natural rubber, modified natural rubber, polybutadiene, polyisoprene, neoprene, hydrogenated styrene/butadiene/styrene block copolymer (SEBS), styrene/isoprene styrene block copolymer (SIS), hydrogenated styrene/isoprene/styrene block copolymer (SEPS) ethylene/propylene rubber (EPM) and ethylene/propylene/diene rubber (EPDM);0.5 to 10% by weight of (c) at least one rubber selected from the group consisting of maleic anhydride-modified SEBS, epoxy-modified SEBS, styrene/butadiene block copolymer (SBR) and styrene/butadiene/styrene block copolymer (SBS), said component (c) having a micro-phase separation temperature of up to 180.degree. C. when diluted with dioctyl phthalate to a solution with a concentration of 60% by weight; and0.5 to 5% by weight of a (d) poly(phenylene ether).