| 摘要 |
<p>A composition consisting essentially of a) high impact styrene-butadiene graft copolymer or a mixture thereof with no more than about 55% styrene homopolymer, b) small proportions of polyethylene or polypropylene, and c) a block copolymer 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 polybutadiene 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 characterized by having a skin which is substantially enriched in polyolefin.</p> |
