| abstract |
(57) Abstract: An oil-soluble dispersant is disclosed. The dispersant comprises a reaction product of a functionalized 1-butene copolymer and at least one nucleophilic reactant selected from amines, amino alcohols, alcohols and reactive metal compounds. Functionalized copolymer, within its structure, having a C 4 -C 10 dicarboxylic acids and derivatives thereof, and C 3 -C 10 monocarboxylic acid and at least one acyl functional group selected from the group consisting of a derivative thereof . The 1-butene copolymer comprises 1-butene and at least one other of the formula CH 2 ＣＨCHR ′, where R ′ is methyl or a C 3 -C 12 linear or branched alkyl group. Derived from α-olefins. The copolymer has a number average molecular weight of at least about 700 and a molecular weight distribution of less than 5, and ethenylidene groups terminating at least about 30% of all polymer chains. Dispersants are useful in oily compositions, including lubricating oil compositions and concentrates and fuel compositions. |