Exxonmobil Chemical Patents Inc.

Yen-Hao Lin

Lubin Luo

Anupriya Jain

Edward John Blok

Matthew S Bedoya

Alan Anthony Galuska

Xin Chen

Medrado M Leal

Alexander V Zabula

Sergey Yakovlev

Rebecca C Savage

Rachel G Terry

A supported catalyst system is based on a transition metal carbene including the moiety M1=CR*), wherein Mis the transition metal and R* is hydrogen or a C-Chydrocarbyl. The catalyst system can be supported on a metal oxide support such as silica or the catalyst can be self-supporting. Methods of making the catalyst system can involve precursors based on and/or reacted with aluminum alkyls, halides, and/or alkoxides. Methods of polymerizing cyclic olefins with the catalyst system can obtain polyalkenamers, cyclic olefin polymers, cyclic olefin copolymers, and other metathesis reaction products. The supported catalyst and/or monomer can be recovered and recycled to the polymerization reactor.

Metathesis catalyst system for polymerizing cycloolefins

Heterophasic copolymers of propylene and an alpha olefin comonomer having a matrix phase and a fill phase, particularly, a heterophasic copolymer having a high fill phase content (greater than or equal to 50%), are provided herein. Polymerization methods and catalyst systems for producing such heterophasic copolymers are also provided.

Heterophasic copolymers and polymerization methods

Growing community of inventors

Houston, TX, United States of America

Yen-Hao Lin