Preparation of polyisobutylsuccinic anhydrides

Details Preparation of polyisobutylsuccinic anhydrides Preparation of polyisobutylsuccinic anhydrides

1994-06-14

1995-05-30

Kight, III, John

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

44333, 526216, 526271, 526272, 549255, C08F26704

Patent

active

054202078

ABSTRACT:
Polyisobutylsuccinic anhydrides having an average molar ratio of succinic anhydride groups to polyisobutyl groups of from 1.05:1 to 1.3:1 are prepared by reacting polyisobutene having an average molecular weight M.sub.w of 600-5000 and containing at least 70% of terminal double bonds with maleic anhydride in a molar ratio of maleic anhydride to polyisobutene of from 1.05:1 to 3:1 at 160.degree.-210.degree. C. in the presence of a catalytic amount of a dicarboxylic acid of 2 to 6 carbon atoms.

REFERENCES:
patent: 4086251 (1978-04-01), Cengel et al.
patent: 4235786 (1980-11-01), Wisotsky
patent: 4282157 (1981-08-01), van der Voort
patent: 4859210 (1989-08-01), Franz et al.

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