Thermoplastic segmented copolymer rubber compsn. - contg. an aromatic polycarbonate, has improved thermal and mechanical properties

摘要

Polymer mixtures are claimed contg. (1) 99-1 wt % >=1 segmented copolymer comprising partially or fully hydrogenated alternating segments A and B in which the segments A are hard blocks of a vinylaromatic cpd. with a Tg of 20 degrees C and the segments B are soft blocks of a conjugated diene with a Tg of 0 degree C, and (2) 1-99 wt % linear aromatic polycarbonates contg. >=50% structural units in which X = 1-5C alkylene or alkylidene gp. Prods. are thermplastic rubbers having improved thermal resistance, higher abrasion resistance better tear resistance and improved resistance to oxygen and ozone compared to the segmented copolymer without the polycarbonate.