Title:
【発明の名称】アルケニル琥珀酸無水物の熱的二工程製造方法
Document Type and Number:
Japanese Patent JPH07501833
Kind Code:
A
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: (a) 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 at a temperature in the range of about 200 DEG C. to 250 DEG C. to provide a mixture of alkenyl succinic anhydride having an average of about 1.0 succinic group per alkenyl group and unreacted polyolefin, and (b) reacting the mixture of alkenyl succinic anhydride and unreacted polyolefin from step (a) with maleic anhydride in the presence of a free radical initiator at a temperature in the range of about 100 DEG C. to 220 DEG C. to thereby provide an alkenyl succinic anhydride having an average of greater than 1.2 succinic groups per alkenyl group.
Inventors:
Harrison, James Jay.
Ruhe, William Earl., Juniors
Ruhe, William Earl., Juniors
Application Number:
JP50471694A
Publication Date:
February 23, 1995
Filing Date:
July 23, 1993
Export Citation:
Assignee:
Chevron Research and Technology Company
International Classes:
C07D307/60; C08F8/46; C08F255/08; C09K23/00; C10L1/198; C10M129/93; C10M133/52; C10N20/04; C10N30/04; C10N70/00; (IPC1-7): C07D307/60; C08F8/46; C10M129/93
Attorney, Agent or Firm:
Akira Asamura (3 outside)