公开(公告)号：US10479845B2

公开(公告)日：2019-11-19

申请号：US15500941

申请日：2015-09-11

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Leming Gu ,  Stephen T. Dalpe ,  Mauritz Kelchtermans ,  Sunny Jacob ,  John A. Clark ,  Michael F. McDonald, Jr. ,  Torri L. Rose

IPC: C08F8/22 ,  C08K5/13 ,  C08K5/134 ,  C08L23/28 ,  C08F210/10 ,  C08F210/12 ,  C08F236/08 ,  C08K5/3435

Abstract: This invention relates to a method of preparing a brominated elastomer having a stabilized Mooney viscosity. The method includes polymerizing isomonoolefins and at least one polymerizable unit to obtain an elastomer/polymer; brominating the elastomer/polymer to form a brominated elastomer effluent; neutralizing the brominated elastomer effluent to form a neutralized effluent; volatizing off the hydrocarbon solvent; and recovering a brominated elastomer. In at least one point of the process, preferably prior to any significant temperature change in the brominated polymer, a Mooney stabilizer is added into the system. Portions of the Mooney stabilizer may be added at multiple points into the process.

公开(公告)号：US20170226238A1

公开(公告)日：2017-08-10

申请号：US15500941

申请日：2015-09-11

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Leming Gu ,  Stephen T. Dalpe ,  Mauritz Kelchtermans ,  Sunny Jacob ,  John A. Clark ,  Michael F. McDonald ,  Torri L. Rose

IPC: C08F8/22

CPC classification number: C08F8/22 ,  C08F2810/50 ,  C08K5/13 ,  C08K5/134 ,  C08K5/3435 ,  C08F210/12 ,  C08F210/10 ,  C08F236/08 ,  C08L23/28

Abstract: This invention relates to a method of preparing a brominated elastomer having a stabilized Mooney viscosity. The method includes polymerizing isomonoolefins and at least one polymerizable unit to obtain an elastomer/polymer; brominating the elastomer/polymer to form a brominated elastomer effluent; neutralizing the brominated elastomer effluent to form a neutralized effluent; volatizing off the hydrocarbon solvent; and recovering a brominated elastomer. In at least one point of the process, preferably prior to any significant temperature change in the brominated polymer, a Mooney stabilizer is added into the system. Portions of the Mooney stabilizer may be added at multiple points into the process.