申请人:Tonen Corporation
公开号:EP0636682A1
公开(公告)日:1995-02-01
The invention provides a fluid composition for a fluid coupling, which is excellent in viscosity stability and torque stability, and comprises a polyorganosiloxane base oil having a viscosity of 3,000-500,000 mm²/sec at 25°C and at least one 5-membered heterocyclic compound incorporated in a proportion of 0.01-3.0 wt.% based on the total weight of the composition, said 5-membered heterocyclic compound being selected from the group consisting of thiadiazole derivatives and thiazole derivatives, both, having at least one monovalent group represented by the formula -Sx-R⁶ in which R⁶ is a saturated or unsaturated monovalent group or atom composed of at least one atom selected from a carbon atom, a hydrogen atom, an oxygen atom, a nitrogen atom and a sulfur atom, and x is a number of 1 or greater.
本发明提供了一种用于液力偶合器的流体组合物,该组合物具有优异的粘度稳定性和扭矩稳定性,包括在 25°C 时粘度为 3,000-500,000 mm²/sec 的聚有机硅氧烷基础油,以及至少一种 5 元杂环化合物,其加入比例为 0.01-3.0(基于组合物总重量)。所述五元杂环化合物选自由噻二唑衍生物和噻唑衍生物组成的组,二者均具有至少一个由式 -Sx-R⁶ 代表的单价基团,其中 R⁶ 是饱和或不饱和单价基团或原子,由至少一个选自碳原子、氢原子、氧原子、氮原子和硫原子的原子组成,且 x 是 1 或更大的数字。