An gear oil comprising:
a) a base oil having a kinematic viscosity at 100°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:
where R1 is alkyl of 1 to 6 carbon atoms;
(ii) 30-85 wt% of units derived from a C7-C14 alkylmethacrylate of the formula:
where R2 is alkyl of 7 to 14 carbon atoms;
(iii) 3-50 wt % of units derived from a C15-C20 alkylmethacrylate of the formula:
where R3 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:
where R4 is hydrogen or a lower alkyl group; R5 and R6 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.
齿轮油,包括
a) 基础油,100°C 时的运动粘度为 4.0 至 41.0 厘斯特,粘度指数为 60 至 140;
b) 0.1%至 10%(按重量计)的聚合物,包括:
(i) 0-50%重量百分比的由式 C1-C6 烷基
甲基丙烯酸酯衍生的单元:
其中 R1 为 1 至 6 个碳原子的烷基;
(ii) 30-85 wt%由式 C7-C14 烷基
甲基丙烯酸酯衍生的单元:
其中 R2 为 7 至 14 个碳原子的烷基;
(iii) 3-50 wt % 的单元来自式 C15-C20 烷基
甲基丙烯酸酯:
其中 R3 为 15-20 个碳原子的烷基;以及
(iv) 2-10 wt % 的单元来自式中的 N,N-二烷基
氨基烷基(甲基)
丙烯酰胺:
其中 R4 为氢或低级烷基;R5 和 R6 各自独立地为氢或选自烷基、芳基环烷基、芳基和烷 芳基的烃基,包括被惰性取代的此类基;R''为选自亚烷基、亚芳基、环烷基、芳基和烷 芳基的烃基,包括被惰性取代的此类基;以及 A 选自-O-、-S-和-NH-;和
c) 至少一种齿轮性能添加剂。