公开(公告)号：WO2021011883A1

公开(公告)日：2021-01-21

申请号：PCT/US2020/042568

申请日：2020-07-17

Applicant: EXXONMOBIL CHEMICAL PATENTS INC.

Inventor： BAI, Zhifeng ,  LOYD, Scott, H. ,  DHARMARAJAN, Narayanaswami ,  ABMAYR, David, W., Jr. ,  ROHDE, Brian, J. ,  MANN, Jason, A.

IPC: C08L23/16 ,  C08F210/06 ,  C09J123/16

Abstract: An elastomeric composition suitable for use in belts like transmission belts may comprise: from 5 to 100 phr of a propylene-α-olefin-diene (PEDM) terpolymer comprising 80 wt% to 97.5 wt% propylene, 2.5 wt% to 20 wt% a-olefin, and 0.5 wt% to 10 wt% diene, said wt% based on the weight of the PEDM terpolymer, and wherein the PEDM terpolymer has (a) Mooney viscosity (ML(1+4)) of 1 MU to 60 MU, (b) melt flow rate of 0.5 g/min to 100 g/min, and (c) a weight average molecular weight to n-average molecular weight (Mw/Mn) ratio of 1.5 to 3.0; and from 60 to 95 phr of an ethylene-based copolymer comprising 0 wt% to 95 wt% ethylene, 0 wt% to 10 wt% of one or more dienes, and 5 wt% to 60 wt% C3 to C12 α-olefin, said wt% based on the total weight of the ethylene -based copolymer.