ENGINE LUBRICANT Russian patent published in 2016 - IPC C10M161/00 C10M169/04 C10N30/02 

FIELD: chemistry.

SUBSTANCE: invention relates to composition of lubricant, which includes: (a) from 65 to 90 wt % of one or more than one basic oil, (b) from 2 to 15 wt % of at least one comb polymer, formed by main chain of polyalkyl(meth)acrylate and hydrocarbon side chains, containing at least 50 carbon atoms, (c) from 0.01 to 2 wt % of at least one nitrogen-containing organic friction modifier, selected from fatty amides or imides, obtained by condensation of dicarboxylic acid of formula (IX), whereinR₁₂ and R₁₃ independently represent hydrogen atom or hydrogen group or hydrogen groups R₁₂ and R₁₃ form a ring with amine of formula (X) R₁₄R₁₅NH, wherein R₁₄ and R₁₅ independently represent hydrogen atom or aliphatic chain, containing from 1 to 50 carbon atoms, and, at least, one of chains R₁₄ or R₁₅ represents fatty aliphatic chain, containing, at least, 7 carbon atoms, (d) possibly one or more than one organometallic friction modifier of organomolybdenum type, with said comb polymer (b) being obtained by copolymerisation of macromonomers of formula (II) with acryl or methacryl monomers of formula (III), wherein: each R' independently represents hydrogen atom or methyl, R₁ represents alkyl or aryl radical, containing from 1 to 6 carbon atoms, R₂ represents alkyl radical, containing from 1 to 26 carbon atoms, A is formed by 1,4-addition of butadiene, possibly, substituted with alkyl groups, containing from 1 to 6 carbon atoms, or vinyl addition of styrene, possibly substituted with alkyl groups, containing from 1 to 6 carbon atoms, A' is formed by 1,2-addition of butadiene, possibly substituted with alkyl groups, containing from 1 to 6 carbon atoms, or vinyl addition of styrene, possibly substituted with alkyl groups, containing from 1 to 6 carbon atoms, n and m represent integer numbers, larger or equal to zero, and n+m constitutes integer number from 7 to 3000 (versions). The claimed invention also relates to application of lubricant composition for lubrication of 4-stroke petroleum or Diesel engines of cars.

EFFECT: obtaining lubricant, which makes it possible to achieve considerable fuel economy, in particular, in city cold cycle.

9 cl, 2 tbl, 1 dwg