Multifunctional branched polymers with improved low-temperature performance
AssigneeAfton Chemical Corporation
InventorsSheng Jiang, Arturo Carranza
Life of this patent
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Abstract
A viscosity index improver comprising a reaction product of (i) an acylated copolymer obtainable by acylating a copolymer of ethylene and one or more C3-C10 alpha-olefins having an Mn of 3,000 to 250,000 g/mol; and (ii) a compound of the formulae (III)-(V): wherein R6, R8, R9, R10, R12 and R15 are independently selected from a hydrogen and an optionally substituted linear or branched alkyl or alkenyl group, and R7, R11, R13, R14, R16, and R17 are independent selected from an optionally substituted linear or branched alkyl or alkenyl group, and a sum of the number of carbon atoms in each compound of the formulae (III)-(V) is from 6 to 31.
Claims29
A viscosity index improver comprising a reaction product of
- (i) an acylated copolymer obtainable by acylating, with an acylating agent, a copolymer of ethylene and one or more C3-C10 alpha-olefins having a number average molecular weight of 3,000 g/mol to 250,000 g/mol as measured by GPC,
- wherein an ethylene content of the copolymer of ethylene and one or more C3-C10 alpha-olefins is 10 mol % to 70 mol % and the C3-C10 alpha-olefin content of the copolymer of ethylene and one or more C3-C10 alpha-olefins includes at least 40 mol % of propylene when the one or more C3-C10 alpha-olefins comprises propylene;
- and
- (ii) a compound selected from one or more compounds of the formulae (III)-(V):
- wherein R6 is selected from a hydrogen and a linear or branched alkyl or alkenyl group, and R7 is a linear or branched alkyl or alkenyl group, and a sum of a number of carbon atoms of R6 and R7 is from 7 to 31;
- wherein R8, R9 and R10 are independently selected from a hydrogen and a linear or branched alkyl or alkenyl group;
- and R11 is selected from a linear or branched alkyl or alkenyl group, and a sum of a number of carbon atoms of R8, R9, R10 and R11 is from 6 to 30;
- and
- wherein R13, R14, R16, and R17 are independently selected from a linear or branched alkyl or alkenyl group;
- R12 and R15 are independently selected from hydrogen and a linear or branched alkyl or alkenyl group, a sum of a number of carbon atoms of R12, R13, R14, R15, R16 and R17 is from 6 to 30, and only one of R12 and R15 can be hydrogen;
- and
- the alkyl or alkenyl groups of the compounds of the formulae (III)-(V) are optionally substituted with one or more of halo groups, alkoxy groups, mercapto groups, nitro groups, nitroso groups, sulfoxy groups, pyridyl groups, furyl groups, thienyl groups, imidazolyl groups, and sulfur, and no more than two non-hydrocarbon substituents are present for every ten carbon atoms in the alkyl or alkenyl group, and
- the ratio of moles of amine per mole of carboxyl groups of the acylated polymer, is from 0.25:1 to 4:1.
Dependencies are inferred from the claim text.