Copolymers from .alpha.-.beta.-unsaturated dicarboxylic acid esters, and their use
AssigneeAkzo Nobel N.V.
InventorHeinz Beck
Life of this patent
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Abstract
Lubricant or lubricant additives comprising copolymers of .alpha.-.beta.-unsaturated dicarboxylic acid esters and .alpha.-olefins. When the olefin to ester ratio is 0.5 to 4.0 the .alpha.-olefins may have 10-16 C-atoms and the .alpha.-.beta.-unsaturated dicarboxylic acid is esterified with straight-chain and/or branched monoalcohol of 3-10 carbon atoms. When the ratio is less than 2.0 the .alpha.-olefin is C.sub.16 and the esterifying component may be C.sub.4 -C.sub.10 alcohol. The copolymers are useful as synthetic lubricating oils, mineral oil additives, lubricant additives and as lubricants for the shaping treatment of thermoplastic plastics.
Claims6
A lubricant additive comprising a liquid copolymer of (a) at least one .alpha.-olefin, and (b) at least one .alpha.-.beta.-ethylenically unsaturated dicarboxylic acid diester having an alcohol esterifying component in a molar ratio (a):(b) of from 0.5 to 4, the .alpha.-olefin being within the range of from C.sub.10 .alpha.-olefins to C.sub.16 .alpha.-olefins, C.sub.16 .alpha.-olefins, if employed, being employed only in mixture with C.sub.10 to C.sub.14 .alpha.-olefin, and the alcohol esterifying component of the .alpha.-.beta.-ethylenically unsaturated diester being within the range of from C.sub.3 alcohol to C.sub.9 alcohol, said liquid copolymer having a pour point of about -20.degree. C. or lower and a molecular weight of up to about 3250.
Dependencies are inferred from the claim text.