Process for the preparation of branched polydienes in the...

Details Process for the preparation of branched polydienes in the... Process for the preparation of branched polydienes in the...

2006-07-18

2006-07-18

Teskin, Fred (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S153000, C526S164000

Reexamination Certificate

active

07078466

ABSTRACT:
A process is described for the preparation of polydienes with a low vinyl content and having a branched structure effected by means of the polymerization of conjugated dienes in the presence of catalysts based on rare-earth compounds. The resulting polymers are characterized in that they have a cis content varying from 80 to 96% and prove to be branched with consequent low viscosity values in solution.

REFERENCES:
patent: 6391990 (2002-05-01), Ishino et al.
patent: 2002/0016423 (2002-02-01), Jang et al.
patent: 0 863 165 (1998-09-01), None
patent: 1 054 026 (2000-11-01), None
patent: WO 00/69928 (2000-11-01), None

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