Patent ID: 7776801

Claim:
A composition of mineral oil as the main component and an additive mixture wherein the additive mixture contains the additive components a) mixtures of 40.00 to 60.00 mass % of ethylene-vinylester copolymers modified by polar groups with molecular mass weight averages of 3000 to 50000 and an ethylene portion of 50 to 90 mass % and 60.00 to 40.00 mass % of unmodified ethylene-vinylester copolymers, in which the ethylene-vinylester copolymers modified by polar groups are a1) hemiacetals of ethylene-vinylester-vinylalcohol copolymers with butyraldehyde and/or a2) ethylene-vinylacetate copolymers grafted with vinylacetate and having molecular mass number averages from 800 to 5000 and a total vinylacetate content of 20 to 60 mass %, the vinylacetate content of the copolymer backbone chain being from 10 to 40 mass % and the portion of the grafted vinylacetate branches in relation to the vinylacetate-grafted ethylene-vinylacetate copolymers making up 10 to 20 mass %, and contain b) esters of C 2 -C 6 -polyalcohols and C 12 -C 40 -monocarboxylic acids, and/or c) partially and/or completely imidated copolymers of unsaturated C a -C 20 -dicarboxylic anhydrides and vinyl aromatics and/or C 2 -C 36 -α-olefin, whereby the content of the additive mixture in the mineral oil is 0.005 to 1 mass % and the mass ratio of the additive components a/b or a/c or a/(b+c) is 10:90 to 90:10, respectively.