Ashless dispersant compounds, their preparation, and their use in providing dispersancy in lubricating oils or liquid fuels

摘要

Novel ashless dispersants are provided by oil-soluble compounds each defined as an olefin polymer having an average molecular weight of 500-500,000 to which is grafted an N-allyl amide having the structure …CHEM… wherein R1 is hydrogen or a hydrocarbon group containing from 1 to 30 carbon atoms or R1 may be absent, R2 is hydrogen, an alkyl group containing from 1-30 carbon atoms, a cycloalkyl group containing from 6-10 carbon atoms, an aryl group containing from 6-10 carbon atoms or, allyl, and n is 1 or 2; provided that when R1 is hydrogen n is 1, when R1 is a hydrocarbon group containing from 1 to 30 carbon atoms n is either 1 or 2, and when R1 is absent n is 2. Such products may be made by reacting the N-alkyl amide and olefin polymer in the presence of a free radical-generating catalyst. Lubricating oil dispersancy is improved by adding to the oil such a product.