Process for producing styrene-based polymers and catalyst for us

Details Process for producing styrene-based polymers and catalyst for us Process for producing styrene-based polymers and catalyst for us

1988-11-21

1990-12-18

Garvin, Patrick P.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526160, 526165, 5263472, 502103, 502111, C08F 4642

Patent

active

049787306

ABSTRACT:
A process for producing styrene-based polymers having mainly syndiotactic configuration in the presence of a catalyst comprising (A) a titanium compound and (B) a contact product of a methyl group-containing organoaluminum compound and water, wherein the contact product (B) has a high magnetic field component of not more than 50% in the methyl proton signal region due to an aluminum-methyl group (Al--CH.sub.3) bond as determined by the proton nuclear magnetic resonance absorption method.
According to this process, styrene-based polymers having mainly syndiotactic configuration can be efficiently and economically produced.

REFERENCES:
patent: 3534006 (1970-10-01), Kamaishi et al.
patent: 4680353 (1987-07-01), Ishihara et al.

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