Preparation of medium molecular weight, highly reactive polyisob

Details Preparation of medium molecular weight, highly reactive polyisob Preparation of medium molecular weight, highly reactive polyisob

1997-05-06

1999-06-08

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 64, 526209, 526210, 526212, 526216, 5263487, 585510, 585525, C08F 414, C08F11010

Patent

active

059105500

ABSTRACT:
Polyisobutene having an average molecular weight M.sub.n of from above 5000 to 80,000 dalton and containing more than 50 mol % of terminal double bonds is prepared by a novel process, by cationic polymerization of an isobutene-containing hydrocarbon mixture in. the liquid phase in the presence of a boron trifluoride complex catalyst, and has a dispersity of M.sub.w /M.sub.n of from 2 to 4 and is contained in lubricants.

REFERENCES:
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patent: 4914166 (1990-04-01), Kennedy et al.
patent: 4943616 (1990-07-01), Mishra et al.
patent: 5254649 (1993-10-01), Miln et al.
patent: 5408018 (1995-04-01), Rath
patent: 5448001 (1995-09-01), Baird
patent: 5563313 (1996-10-01), Chung et al.

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