Polymerization process

Details Polymerization process Polymerization process

1976-06-17

1978-03-14

Hamrock, William F.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526176, 526178, C08F 448, C08F 450

Patent

active

040791769

ABSTRACT:
Process of homopolymerizing conjugated dienes or copolymerizing conjugated dienes either with each other or with vinyl aromatic compounds to form elastomeric products having simultaneously a high content of trans-1,4 linkages and a low content of 1,2 linkages.
In accordance with the invention, the monomers are reacted in a reaction medium in the presence of an added catalytic composition comprising (a) an organo-lithium initiator and (b) a catalyst compound having one of the formulas:

REFERENCES:
patent: 3380979 (1968-04-01), Chiang
patent: 3429861 (1969-02-01), Chiang et al.
patent: 3448092 (1969-03-01), Chiang
patent: 3526604 (1970-09-01), Wadsworth
patent: 3539542 (1968-03-01), Nakatzuka et al.
patent: 3631006 (1971-12-01), Hawkins

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