| 摘要 |
Elastoplastic polyolefin composition comprising, in percent by weight: A) 10-50 % of a copolymer of propylene with one or more comonomer(s) selected from ethylene and CH2=CHR alpha-olefins where R is a 2-8 carbon alkyl, which copolymer contains from 1 to 8% of comonomer(s); B) 50-90 % of a copolymer of ethylene and (i) propylene or (ii) CH2=CHR alpha-olefins, where R is a 2-8 carbon alkyl radical,or (iii) a combination thereof, optionally with minor amounts o f a diene, containing from 57 to 80 % of ethylene; wherein the weight ratio B/XS of the content B of copolymer component (B) to the fraction XS soluble in xylene at room temperature, both referred to the total weight of (A) + (B), is of 1.5 or less, and the intrinsic [Q] viscosity of the said XS fraction is of 3 dl/g or more.
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