Additive mixture for mineral oil products comprises an ethylene/vinyl ester copolymer together with a mixed glyceride, an imidated anhydride copolymer and/or a waxy ester

摘要

Additive mixture for mineral oil products comprises an ethylene/vinyl ester copolymer (I) together with a mixed ester (II) of glycerol with an unsaturated monocarboxylic acid and a partially imidated and/or esterified maleic anhydride copolymer and/or an imidated copolymer (III) of maleic anhydride and alpha -methylstyrene and/or a waxy oligomeric ester (IVa) based on glycerol monostearate and dimer acids and/or a wax ester (IVb) based on two different alcohols and dimer acids : Additive mixture for use in mineral oil products in an amount of 0.005-1 wt.% comprises an ethylene/vinyl ester copolymer (I) having a molecular weight of 3000-50000 and an ethylene content of 50-90 wt.% together with a mixed ester (II) of glycerol in which 50-80% of the hydroxy groups are esterified with an unsaturated C12-C40 monocarboxylic acid and 20-50% of the hydroxy groups are esterified with a partially imidated and/or esterified maleic anhydride copolymer and/or an imidated copolymer (III) of maleic anhydride and alpha -methylstyrene with a molecular weight of 1500-15000 and at least one terminal group based on dimeric alpha -methylstyrene and/or a waxy oligomeric ester (IVa) based on glycerol monostearate and dimer acids and comprising at least 90 wt.% of structures of formula (A) and/or a wax ester (IVb) with a petrolatum-like consistency based on two different C14-C36 alcohols and dimer acids and comprising at least 80 wt.% of structures of formula (B). The weight ratio of (I) to (II), (III), (IVa) or (IVb) is 10:90 to 90:10. Y(OCHR 1>CH 2OCO(CH 2) aCHR 2>CHR 3>(CH 2) dCO) nOX (A) H 3C(CH 2) iOCO(CH 2) kCHR 4>CHR 5>(CH 2) pCOO(CH 2) sCH 3 (B) R 1>CH 2OCO(CH 2) zCH 3; R 2>(CH 2) bCH 3; R 3>(CH 2) cCH 3; n : 1-20; a+b+c+d : 30; z : 12-20; Y : H or CO(CH 2) dCHR 2>CHR 3>(CH 2) aCOOH; X : H or CH 2CH(OH)CH 2OCO(CH 2) zCH 3; R 4>(CH 2) mCH 3; R 5>(CH 2) nCH 3; i, s : 13-35; k+m+n+p : 30-34. Independent claims are also included for: (1) mineral oil product as above in which the mineral oil is crude oil or a middle distillate fuel oil with a sulfur content below 0.05 wt.%; (2) producing a mineral oil product by preparing a solution containing 1-60 wt.% of an additive mixture as above in a middle distillate oil at 20-90[deg]C and homogenizing the solution with a mineral oil, where other additives are added to the solution or mineral oil in an amount of 0-200% by weight of the additive mixture.