公开(公告)号：US20250101156A1

公开(公告)日：2025-03-27

申请号：US18975725

申请日：2024-12-10

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Peijun Jiang

IPC: C08F210/18 ,  C08F4/64 ,  C08F4/6592 ,  C08F210/16

Abstract: High molecular weight elastomers, such as ethylene-propylene-diene monomer (EPDM) polymers, are conventionally formulated with a post-polymerization oil extension to mitigate their high Mooney viscosity. Post-polymerization oil extension adds to processing costs and precludes use of polymerization facilities lacking oil extension capabilities. A low molecular weight polymer may be co-produced with a high molecular weight elastomer containing the same monomers, where the low molecular weight polymer may function in place of conventional oil extension. Polymerization methods may form a polyolefin blend comprising first and second polyolefins having a bimodal molecular weight distribution.