IMPROVED HETEROPHASIC POLYPROPYLENE

摘要

The present invention relates to a composition comprising: a heterophasic polypropylene containing i) a matrix phase of a propylene homopolymer and/or a propylene copolymer with up to 3 wt.% of ethylene and/or at least one C4-C8 α-olefin, the wt.% based on the weight of the copolymer and ii) a disperse phase of an ethylene - C3 - C8 α-olefin copolymer, wherein the ethylene content is at least 40 wt.% based on the weight of the ethylene - C3 - C8 α-olefin copolymer, one or more of a compatibiliser, wherein the compatibiliser is i) a non-aromatic polyester having an average M/E ratio of at least 10 and/or ii) a block copolymer comprising a polypropylene block and a polyester block, said polyester being a non-aromatic polyester and having an average M/E ratio of at least 10, wherein M is the number of backbone carbon atoms in the polyester, not including the carbonyl carbons and E is the number of ester groups in the polyester.