Iowa State University Research Foundation Inc

Kumho Petrochemical

Korea Kumho Petrochemical Co., Ltd.

Hanbaek Lee

Gwanghoon Kwag

Aaron David Sadow

Bradley M Schmidt

Dong Eun Kang

Bunyeoul Lee

Hoochae Kim

Jihae Park

Aradhana Pindwal

Ahreum Kim

Seunghyun Do

The present invention relates to a modified polymer having the structure of Formula (I) and Formula (IV): R, R, R, a, and n are as described herein and R, R', R&#x2033;, x, and k are as described herein and methods for preparation thereof. The present invention also relates to a compound having the structure of Formula (II):

End group functionalization agents for polydiene

The present invention relates to a modified polymer having the structure of Formula (I) and Formula (IV): wherein A, R, R, R, a, and n are as described herein and wherein R, R', R&#x2033;, x, and k are as described herein and methods for preparation thereof. The present invention also relates to a compound having the structure of Formula (II): wherein A, R, R, R, a, and n are as described herein. The present invention also relates to a process for polymerizing unsaturated hydrocarbon monomers.

The present invention relates to processes for polymerizing unsaturated hydrocarbon monomers. The present invention also relates to a precatalyst having the structure of Formula (I):M{C(SiHAlk)}&#x2003;&#x2003;(I),and to a catalyst comprising the structure of Formula (II):MC(SiHAlk)X&#x2003;&#x2003;(II),and methods for preparation thereof.

Polymerization catalysts

The present invention relates to preparing high 1,4-trans-polybutadiene by polymerizing 1,3-butadiene or a butadiene derivative in a non-polar solvent in the presence of a catalyst system comprising a novel bimetallic cobalt-aluminum adduct, which makes it possible to prevent gel formation, control the molecular weight of the trans-polybutadiene and increase the trans content of the trans-polybutadiene. The catalyst system comprising the novel cobalt-aluminum adduct has a high oxidation state and structural stability, and the reactivity of the catalyst is controlled using novel activation systems comprising various allyloxy aluminum compounds.

Bimetallic cobalt-aluminum adduct catalyst system for preparing high trans-1,4-polybutadiene

Growing community of inventors

Daejeon, South Korea

Hanbaek Lee