Viscosity index-modifying polymer blends for petroleum fractions

摘要

Polymer blends of a copolymer (A1) of 10-60% by weight of vinyl acetate and 40-90% by weight of ethylene or of a copolymer (A2) of 15-50% by weight of vinyl acetate, 0.5-20% by weight of C6-C24- alpha -olefine and 30-70% by weight of ethylene and a copolymer (B) of 10-90% by weight of C6-C24- alpha -olefine and 10-90% of N-C6-C12-alkyl- maleimide, the mixing ratio of the copolymers (A1) or (A2) to (B) being 100:1 to 1:1, are used as flow improvers in mineral oil distillates.