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Application filed by Ustav Makromolekularni ChemiefiledCriticalUstav Makromolekularni Chemie
Priority to CS233089ApriorityCriticalpatent/CS274989B2/en
Publication of CS274989B2publicationCriticalpatent/CS274989B2/en
Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications
(AREA)
Lubricants
(AREA)
Abstract
The solution concerns a method of preparation of polyalkenyl-succinic anhydrides for ash-free dispersing agents and other additives for liquid fuels and lubricating oils. The solution consists in the fact that polyalkenes consisting of copolymers C3 to C10 of olefins containing from 1 to 15 percent by weight of inbuilt 1,3-butadiene in the mixture having the average number molecular weight of 500 to 1100 react with maleinan hydride in molecular ratio of 1.1 to 0.3 at a temperature of 180 to 270 degrees C.
CS233089A1989-04-141989-04-14Method of polyalkenyl-succinanhydrides preparation
CS274989B2
(en)
Dispersant composition for lubricating oil, additive packages and lubricating oil compositions comprising the dispersant ingredients of said composition, a method of imparting dispersancy to a lubricating oil, and ingredients intended for use in a dispersant mixture