Patent ID: 8227547
Filing Date: 2012-07-24
Classification: C08F,C08J,C08L

Abstract:
1. A foamable thermoplastic in-reactor polymer blend comprising: (a) a first propylene polymer component comprising 90 to 100 wt % propylene and from 0 to less than 10 wt % comonomer, said first propylene component having a Tm of 120° C. or more; (b) a second propylene polymer component comprising from 30 to 90 wt % propylene and 70 to 10 wt % comonomer, said second propylene polymer having an Mw of 30,000 g/mol or more, and said second propylene-containing polymer having a crystallinity different by at least 5% from the first polymer; and (c) from 0 to about 10 wt % based on the total material in the blend of foaming agent; wherein, prior to combination with the foaming agent, the polymer blend has: