| 摘要 |
<p>An gear oil comprising: a) a base oil having a kinematic viscosity at 100 DEG C ranging of 4.0 to 41.0 cSt and a Viscosity Index of from 60 to 140; b) 0.1 to 10 percent by weight of a polymer comprising : (i) 0-50 wt % of units derived from a C1-C6 alkylmethacrylate of the formula: <CHEM> where R<1> is alkyl of 1 to 6 carbon atoms; (ii) 30-85 wt% of units derived from a C7-C14 alkylmethacrylate of the formula: <CHEM> where R<2> is alkyl of 7 to 14 carbon atoms; (iii) 3-50 wt % of units derived from a C15-C20 alkylmethacrylate of the formula: <CHEM> where R<3> is alkyl of 15-20 carbon atoms; and (iv) 2-10 wt % of units derived from of a N,N-dialkylaminoalkyl(meth)acrylamide of formula: <CHEM> where R<4> is hydrogen or a lower alkyl group; R<5> and R<6> are each independently hydrogen or a hydrocarbon selected from alkyl, aralkyl cycloalkyl, aryl and alkaryl, including such radicals when inertly substituted; R'' is a hydrocarbon group selected from alkylene, aralkylene, cycloalkylene, arylene and alkarylene, including such radicals when inertly substituted; and A is selected from -O-, -S- and -NH-; and c) at least one gear performance additive. d</p> |
