| 摘要 |
Disclosed are compositions of crystalline propylene polymers comprising (by weight): A) 30-65% of a copolymer of propylene with a C4-C8 alpha -olefin, containing from 98 to 80% propylene; B) 35-70% of a copolymer of propylene with ethylene and optionally from 2 to 10% of a C4-C8 alpha -olefin, said copolymer containing 2 to 10% ethylene when the C4-C8 alpha -olefin is not present, and 0.5 to 5% ethylene when the C4-C8 alpha -olefin is present. y |
