| abstract |
The present invention relates to a lubricating composition comprising an oil soluble poly (2-oxazoline) additive having the following repeat units: In this formula, The number n of repeating units is an integer from 4 to 1000; The polymer comprises an inorganic or organic nucleophilic polymerization terminator (t), and a linear, branched or cyclic hydrocarbyl polymerization initiator group (i); R 1 is a linear, branched, or cyclic hydrocarbyl group having 1 to 100 carbon atoms, or some or all of which has 12 to 100 carbon atoms, or one or more macromonomers having more than 50 carbon atoms A single hydrocarbyl group or a mixture thereof; However, when the polymer is a homopolymer and R 1 has no heteroatom, (A) the above (i) has a molecular weight of less than 250 g / mol, R 1 has an average number of carbon atoms of 12 to 50; or (B) n is greater than 15. The polymer provides a composition in the form of a lubricant having a friction modifier and a low impact on lubricant viscosity. The polymer may be a homopolymer, a block copolymer or a star polymer. |