Patent ID: 6800711
Filing Date: 2004-10-05
Classification: C08F,C08L

Abstract:
A branched polyolefin havinga main chain of a polymer of ethylene or a copolymer of ethylene with at least one comonomer selected from the group consisting of &agr;-olefins having from 4 to 20 carbon atoms, cyclic olefins and styrenes, and side chains of a propylene homopolymer or a copolymer of propylene with at least one comonomer selected from the group consisting of ethylene, &agr;-olefins having from 4 to 20 carbon atoms, cyclic olefins and styrenes, wherein the side chains have an isotactic triad fraction of not smaller than 80%, said fraction indicating the stereospecificity of the propylene-bonding site in the side chains; wherein an ethylene content of said main chain exceeds 50 mol %; and wherein a propylene content of said side chain is 50 mol % or more.