Patent ID: 6417275
Filing Date: 2002-07-09
Classification: C08L

Abstract:
A propylene-based copolymer composition comprising:10 to 60% by weight of a polymer component (A); and 40 to 90% by weight of a copolymer component (B), wherein said polymer composition is obtained by a two-stage polymerization process comprising a first producing the component (A) by polymerization and then producing the component (B) by polymerization, wherein said polymer component (A) comprises a polypropylene homopolymer and has an isotactic index of not less than 90%, and said copolymer component (B) comprises propylene and other &agr;-olefin having not more than 8 carbon atoms, and contains propylene and ethylene as essential components, said copolymer component containing cold xylene insolubles in an amount of from more than 20 to 70% by weight based on the weight of whole polymers, and cold xylene solubles in an amount of 10 to 60% by weight based on the weight of whole polymers, and said cold xylene solubles containing an &agr;-olefin other than propylene in an amount of less than 20% by weight.