公开(公告)号：US11041035B2

公开(公告)日：2021-06-22

申请号：US16289918

申请日：2019-03-01

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： John R. Hagadorn ,  Jo Ann M. Canich ,  Jingwen Zhang ,  Peijun Jiang ,  Britni J. Brobey

IPC: C08F2/38 ,  C08F4/643 ,  C08F4/642 ,  C08F210/06 ,  C08F236/20 ,  C08F210/16 ,  C08F10/02 ,  C08F2/00 ,  C08K5/01 ,  C08F4/64 ,  C08F4/659 ,  C08K5/56

Abstract: The present disclosure provides methods for producing an olefin polymer including: i) contacting alpha-olefin with a first catalyst system comprising a first non-metallocene catalyst, a first activator, and a reversible chain transfer agent to form a first polymer; ii) contacting the first polymer with a coupling agent in the presence of a catalyst, an activator; and iii) obtaining a second polymer. The present disclosure further provides polymers having a g′vis value from about 0.4 to about 0.8 and a vinyl unsaturation content of 0.8 or greater vinyls/1000 carbons, and preferably low gel content.

公开(公告)号：US11479625B2

公开(公告)日：2022-10-25

申请号：US16978233

申请日：2019-03-07

Applicant: EXXONMOBIL CHEMICAL PATENTS INC.

Inventor： Jingwen Zhang ,  John R. Hagadorn ,  Jo Ann M. Canich ,  Peijun Jiang ,  Britni J. Brobey ,  Maksim Shivokhin

IPC: C10L1/16 ,  C08F210/18 ,  C10M143/02 ,  C10M169/04 ,  C10N20/00 ,  C10N30/00 ,  C10N20/02 ,  C10N20/04 ,  C10N30/02

Abstract: In some embodiments, ethylene-propylene branched copolymers are synthesized with pyridyldiamido catalysts and a chain transfer agent, and their performance as viscosity modifiers in oil are detailed. In some embodiments, the present disclosure provides for ethylene-propylene branched copolymers having a shear thinning onset of less than about 0.01 rad/s and an HTHS value of less than about 3.3. In some embodiments, the ethylene-propylene branched copolymer is used as a viscosity modifier in a lubricating composition and a fuel composition.

公开(公告)号：US20190276572A1

公开(公告)日：2019-09-12

申请号：US16289918

申请日：2019-03-01

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： John R. Hagadorn ,  Jo Ann M. Canich ,  Jingwen Zhang ,  Peijun Jiang ,  Britni J. Brobey

IPC: C08F210/16 ,  C08F10/02 ,  C08F2/38 ,  C08F2/00 ,  C08K5/56 ,  C08K5/01 ,  C08F4/64 ,  C08F4/659

Abstract: The present disclosure provides methods for producing an olefin polymer including: i) contacting alpha-olefin with a first catalyst system comprising a first non-metallocene catalyst, a first activator, and a reversible chain transfer agent to form a first polymer; ii) contacting the first polymer with a coupling agent in the presence of a catalyst, an activator; and iii) obtaining a second polymer. The present disclosure further provides polymers having a g′vis value from about 0.4 to about 0.8 and a vinyl unsaturation content of 0.8 or greater vinyls/1000 carbons, and preferably low gel content.

公开(公告)号：US11578155B2

公开(公告)日：2023-02-14

申请号：US16978327

申请日：2019-03-07

Applicant: EXXONMOBIL CHEMICAL PATENTS INC.

Inventor： Jingwen Zhang ,  John R. Hagadorn ,  Rainer Kolb ,  Jo Ann M. Canich ,  Maksim Shivokhin ,  Peijun Jiang ,  Britni J. Brobey

IPC: C08L23/00 ,  C10L1/16 ,  C08F210/02 ,  C08F2/06 ,  C08F2/38 ,  C08F4/64 ,  C08F4/659 ,  C08F210/06 ,  C08K5/55 ,  C10M119/02 ,  C10N40/25 ,  C10N30/02

Abstract: In some embodiments, ethylene-propylene random copolymers as viscosity modifiers were synthesized with pyridyldiamido catalyst systems and a chain transfer agent. In some embodiments, the present disclosure provides for ethylene-propylene random copolymers having an ethylene content between about 45 wt % and about 55 wt %. In some embodiments, the ethylene-propylene random copolymer is used as a viscosity modifier in a lubricating composition and a fuel composition.