Process for producing a styrenic polymer having a high degree of

Details Process for producing a styrenic polymer having a high degree of Process for producing a styrenic polymer having a high degree of

1993-06-22

1994-03-15

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526126, 526128, 526133, 526141, 526147, 526160, 526170, 526346, 5263472, 526293, 526326, 526334, 502102, 502103, 502152, 502167, 502202, C08F 4649, C08F 1208

Patent

active

052946851

ABSTRACT:
There are disclosed a catalyst which comprises a specific transition-metal compound (A) and a specific coordination complex compound (B) instead of aluminoxane, and a process for producing a styrene polymer at a reduced cost with improved efficiency by the use of the above catalyst.
The catalyst according to the present invention is inexpensive compared with the conventional catalyst containing aluminoxane as the major ingredient, and exhibits a high activity in the polymerization of a styrenic monomer into styrene polymer with a high degree of syndiotacticity as well as a high yield and conversion rate.

REFERENCES:
patent: 5064802 (1991-11-01), Stevens et al.
patent: 5066741 (1991-11-01), Campbell, Jr.
patent: 5153157 (1992-10-01), Hlatky et al.
Journal of Organometallic Chemistry, vol. 347, 1988, pp. C9-C11, R. Taube, et al.,: "XXX*. Cationic Alkyldicyclopentadienyltitanium Complexes as Catalysts for Ethylene Polymerization".
Journal of American Chemical Society, vol. 111, 1989, pp. 2728-2729, G. G. Hlatky, et al.,: "Ionic, Base-Free Zirconocene Catalysts for Ethylene Polymerization".
Organometallics, vol. 8, No. 12, 1989, pp. 2892-2903, R. F. Jordan, et al.,: "Synthesis and Chemistry of Cationic Alkyl, Alkenyl, and Allyl Complexes Derived from the Soluble, Cationic Hydride (C.sub.5 H.sub.4 Me).sub.2 Zr(H) (THR).sup.+ ".

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