One-step process for the preparation of alkenyl succinic anhydri

Details One-step process for the preparation of alkenyl succinic anhydri One-step process for the preparation of alkenyl succinic anhydri

1992-07-23

1994-06-07

Jagannathan, Vasu S.

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

Synthetic resins

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

525319, 252 56D, C08F25510, C10M14516

Patent

active

053190300

ABSTRACT:
A process for the preparation of an alkenyl-substituted succinic anhydride wherein the alkenyl substituent has a number average molecular weight of from about 500 to 5000 and the average number of succinic groups per alkenyl group is greater than 1.2 which comprises reacting a polyolefin having an alkylvinylidene isomer content of less than about 10 percent and a number average molecular weight of about 500 to 5000 with maleic anhydride in the presence of a free radical initiator at a temperature in the range of about 80.degree. C. to 220.degree. C. for a period of less than 20 hours, wherein the molar ratio of maleic anhydride to polyolefin is about 1.0:1 to 9:1, and wherein the half-life of the decomposition of the free radical initiator is about 5 minutes to 10 hours at the reaction temperature.

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patent: 4234435 (1980-11-01), Meinhardt et al.
patent: 4873004 (1989-10-01), Beverwijk et al.
patent: 5137975 (1992-08-01), Kelusky

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