Synthesis of 1,4-trans-polybutadiene using a lanthanide organic

Details Synthesis of 1,4-trans-polybutadiene using a lanthanide organic Synthesis of 1,4-trans-polybutadiene using a lanthanide organic

1997-09-22

2000-01-25

Wu, David W.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526173, 526335, 526 82, 502117, C08F 448

Patent

active

060180072

ABSTRACT:
The invention provides a catalyst composition, comprising: (a) an organolithium compound; and, (b) an organic acid salt of lanthanide series element; wherein: (1) only components (a) and (b) are required to promote the synthesis of 1,4-trans-polybutadiene; (2) the ratio of component (a) to component (b) is selected to maximize formation of the trans structure of said 1,4-trans-polybutadiene; and, (3) components (a) and (b) are selected for enabling further diblock synthesis. The invention further contemplates a process for using the catalyst to synthesize 1,4-trans-polybutadiene and other polymers and copolymers having trans configuration in the conjugated diene monomer contributed units.

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