Patent ID: 7300960
Filing Date: 2007-11-27
Classification: B60R,C08J,C08L

Abstract:
1. A polypropylene resin expanded particle comprising as a base resin a polypropylene polymer comprising: a structural unit containing 100 to 85 mole % derived from propylene and 0 to 15 mole % derived from ethylene and/or alpha-olefin having 4 to 20 carbons; and as measured by 13C-NMR, the content of position irregularity units formed by 2,1-insertions of propylene monomer units with respect to all propylene insertions is 0.5% to 2.0% and the content of the position irregularity units formed by 1,3-insertion of propylene monomer units with respect to all propylene insertions is 0.005% to 0.4%.