申请人:ETHYL JAPAN CORPORATION
公开号:EP0622444A1
公开(公告)日:1994-11-02
A lubricating oil composition for wet clutches or wet brakes, which comprises a base oil and an inorganic phosphorus compound which may contain sulfur and/or oxygen atom(s) as the constituent element(s) or an amine salt of said compound, or which comprises a base oil, said inorganic phosphorus compound or amine salt thereof, and further an organic polyol compound having at least two hydroxyl groups in its molecule. This composition realizes excellent friction characteristics in wet clutches and brakes, in particular, a high µd (coefficient of kinetic friction) and a high µs (coefficient of static friction), a satisfactory suppression of vibration in lock-up clutches, an excellent persistence of the effect of vibration suppression, and the temperature-independency of the coefficients of friction. Hence this composition is useful as shock absorber oil, power steering oil, hydraulic suspension oil and so forth.
一种用于湿式离合器或湿式制动器的润滑油组合物,它由基础油和一种无机磷化合物(可含有硫和/或氧原子作为组成元素)或上述化合物的胺盐组成,或由基础油、上述无机磷化合物或其胺盐,以及分子中至少含有两个羟基的有机多元醇化合物组成。这种组合物在湿式离合器和制动器中具有优异的摩擦特性,尤其是高 µd(动摩擦系数)和高 µs(静摩擦系数),对锁止离合器中的振动具有令人满意的抑制作用,振动抑制效果具有优异的持久性,而且摩擦系数与温度无关。因此,这种成分可用作减震器油、动力转向油、液压悬挂油等。