POLYMERIC DISPERSANTS PREPARED FROM COPOLYMERS OF LOW MOLECULAR WEIGHT POLYISOBUTENE AND UNSATURATED ACIDIC REAGENT

摘要

This invention is directed to a new low molecular weight copolymer (The PIB/UAR copolymer) that may be prepared by reacting a low molecular weight polyisobutene (PIB) having less than about 32 carbon atoms with an unsaturated acidic reagent in the presence of a free radical initiator. No chain transfer agent is required to prepare the low molecular weight PIB/UAR copolymer. The PIB/UAR copolymer may be useful as is, or as an intermediate for (1) polysuccinimides, (2) detergents or dispersants for tub e oil or fuels, (3) pour point depressants and (4) surface sizing agents for paper . The PIB/UAR copolymer may be used by itself or as the ester, amide, imi de or metal salt derivative of the PIB/UAR copolymer. The PIB/UAR copolymer may be liquid at ambient temperature.