Syndiotactic vinylaromatic polymerization process using low hydr

Details Syndiotactic vinylaromatic polymerization process using low hydr Syndiotactic vinylaromatic polymerization process using low hydr

1995-03-13

1995-11-21

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526151, 526160, 526347, 526905, C08F 464, C08F 1208

Patent

active

054688183

ABSTRACT:
A process for preparing syndiotactic polymers of vinylaromatic monomers comprising contacting one or more vinylaromatic monomers with a catalyst system comprising a pentamethylcyclopentadienyltitanium based metal complex capable of preparing syndiotactic vinylaromatic polymers under coordination polymerization conditions in the presence of hydrogen gas at a hydrogen partial pressure from 10 to 45 kPa and maintaining said partial pressure of hydrogen continuously throughout the polymerization.

REFERENCES:
patent: 4990580 (1991-02-01), Ishihara et al.
patent: 5037907 (1991-08-01), Imabayashi et al.
patent: 5254647 (1993-10-01), Yamamoto et al.

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