Process for selective hydrogenation of conjugated diene polymer

Details Process for selective hydrogenation of conjugated diene polymer Process for selective hydrogenation of conjugated diene polymer

1996-06-25

1998-01-06

Lipman, Bernard

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5253328, 5253324, 5253331, 5253332, 525339, C08F 804

Patent

active

057055718

ABSTRACT:
The present invention provides a process for selective hydrogenation of a conjugated diene polymer. The process includes bringing the conjugated diene polymer in an inert organic solvent into contact with hydrogen in the presence of a specific hydrogenation catalyst combination including (A) a substituted or unsubstituted bis(cyclopentadienyl) Group VIII transition metal compound and (B) an organic lithium compound. The hydrogenation can be carried out in the presence of a small amount of the hydrogenation catalyst combination under mild conditions, and both the hydrogenation conversion and selectivity to conjugated diene units are high.

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