Impact resistant polystyrene/polyolefin compositions and...

Details Impact resistant polystyrene/polyolefin compositions and... Impact resistant polystyrene/polyolefin compositions and...

C - Chemistry, Metallurgy

08

L

400/3033

C08L 53/02 (2006.01) C08L 25/06 (2006.01) C08L 51/00 (2006.01) C08L 51/04 (2006.01) C08L 23/04 (2006.01)

Patent

CA 1127341

ABSTRACT IMPACT RESISTANT POLYSTYRENE/POLYOLEFIN COMPOSITIONS AND GREASE RESISTANT ARTICLES FORMED THEREFROM A composition consisting essentially of a) high impact styrene-butadiene, graft copolymer or a mixture thereof with no more than about 55% by weight styrene homopolymer, b) small proportions of polyethylene or polypropylene, and c) a block co- polymer X-Y-X, in which each X is a polystyrene block of about 5,000 to 10,000 molecular weight and Y is a hydrogenated poly- butadiene block of 25,000 to 50,000 molecular weight, is suitable for the moulding of shaped articles which are resistant to attack by fatty substances and chemicals, and which have impact resistance comparable to high impact polystyrene. The articles are charac- terized by having a skin which is substantlally enriched in poly- olefin.

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