公开(公告)号：US09683097B1

公开(公告)日：2017-06-20

申请号：US15214658

申请日：2016-07-20

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Jan Kalfus ,  Liang Li ,  Narayanaswami Dharmarajan ,  Felix M. Zacarias

IPC: E04D5/06 ,  C08J5/00 ,  C08L23/12

CPC classification number: C08L23/12 ,  C08J5/18 ,  C08J2323/12 ,  C08J2423/12 ,  C08L2314/02 ,  C08L2314/06 ,  E04D5/06 ,  C08L23/16

Abstract: A polymer blend comprising 10 to 90 parts by weight of a propylene-based polymer component having a weight average molecular weight of at least 200 kg·mol−1; and 20 to 80 parts by weight of a propylene-based elastomer component comprising structural units derived from propylene and at least one of ethylene and C4-C12 alpha-olefins having a weight average molecular weight in the range from 5 to 50 kg·mol−1, method for making a membrane comprising the same and roofing membrane comprising the same. The polymer blend is particularly suitable for making roofing membrane due to advantageous elastic modulus in broad temperature ranges.