| 摘要 |
The invention provides a mineral oil composition comprising a mineral oil or a mineral oil distillate, and from 0.001 to 2% by weight of a copolymer. The copolymer is a copolymer of low olefins and vinyl esters, containing: (a) from 85 to 97 mol % of bivalent structural units of the formula (1): (see formula 1) in which R1 and R2, independently of one another, are hydrogen or methyl, and (b) from 3 to 15 mol % of bivalent structural units of the formula (2) (see formula 2) in which R3 is saturated, branched C6-C16-alkyl which has a tertiary carbon atom. R3 is bonded by its tertiary carbon atom to the carboxyl function, and the copolymer contains at most 4% by weight of structural units derived from vinyl acetate. The flowability of the mineral oil or mineral oil distillate is improved by use of the copolymer compared to the prior art additives.
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