Patent ID: 6238447
Filing Date: 2001-05-29
Classification: C08F,C10L,C10M

Abstract:
An oil composition having improved low temperature properties comprising an oil and a minor amount of an additive composition comprising an oil soluble ethylene polymer comprising, in addition to units derived from ethylene, units of the formula: ##STR7##and units of the formula: ##STR8##wherein each R.sup.1 and R.sup.2 group independently represents hydrogen or methyl; each R.sup.3 groups independently represents an alkyl group having between 1 and 4 carbon atoms; each R.sup.4 group independently represents a branched chain alkyl group having up to 15 carbon atoms and different from R.sup.3 ;characterised in that the value P for the polymer lies within the range of 25 to 60, P being defined as: ##EQU3##wherein the degree of branching of the polymer is the number of methyl groups per 100 methylene units, as measured by proton NMR and corrected for the number of methyl and methylene groups in R.sup.3 and R.sup.4 groups.