Patent ID: 6710130
Filing Date: 2004-03-23
Classification: C08J,C08L

Abstract:
A propylene polymer composition obtained by melt-kneading a polymer mixture comprising an olefin multi-stage polymer (B) below and an ethylene polymer (A) below in an amount from 0.01 to 5.0 parts by weight relative to 100 parts by weight of the polymer (B),and having a melt flow rate (MFR (T), unit: dg/min) of 0.1 to 100 dg/min and satisfying the following formula (1) for melt tension (MS, unit:cN) at 190Â° C. and the MFR (T): 1.2âˆ’0.23Ã—Log(MFR(T))>Log(MS)>0.91âˆ’0.23 Log(MFR(T))â€ƒâ€ƒ(1), [1] ethylene polymer (A), having an intrinsic viscosity of from 15 to 100 dl/g measured in tetralin at 135Â° C., [2] olefin multi-stage polymer (B), obtained by; producing a propylene polymer (I) in a polymerization step (I) to a range of from 30 to 95% by weight of the olefin multi-stage polymer, followed by producing an olefin polymer (II) in a subsequent polymerization step (II) to a range of from 5 to 70% by weight of the olefin multi-stage polymer.