A fluid composition for use in fluid couplings has the superior anti-gelling properties of an organopolysiloxane base oil, is low in changes in viscosity and changes in torque, is stable and has extremely high durability, and is especially useful because of its viscosity as a fluid for "fan" couplings. The fluid composition according to the invention is provided, by adding at least one type of ferrocene derivative, in a weight ratio wherein the atomic iron content is 10 ppm to 5,000 ppm, selected from the group consisting of the compounds represented by the general formula (1) and the general formula (2) for an organopolysiloxane base oil having a viscosity of 50 mm2/s to 20,000 mm2/s at 25°C.
The compounds of general formula (1) may be represented by the following formula:
wherein R1 and R2 are identical or different, and are each independently selected from the group consisting of C2-25 alkyl, alkenyl, cyclo-alkyl, and cyclo-alkenyl. Additionally, one of R1 and R2 can be hydrogen atom. The compounds of general formula (2) may be represented by the following formula:
wherein R3 is a bivalent C2-25 hydrocarbon group; and R4 and R5 are each independently selected from the group consisting of C2-25 alkyl, alkenyl, cyclo-alkyl, and cyclo-alkenyl.
一种用于液力偶合器的流体组合物具有有机聚
硅氧烷基础油优越的抗胶凝性能,粘度变化和扭矩变化小,稳定性好,耐久性极高,由于其粘度,作为 "扇形 "偶合器的流体特别有用。根据本发明提供的流体组合物,以原子
铁含量为 10 ppm 至 5,000 ppm 的重量比,加入至少一种
二茂铁衍
生物,该衍
生物选自通式(1)和通式(2)所代表的化合物组,用于 25°C 时粘度为 50 mm2/s 至 20,000 mm2/s 的有机聚
硅氧烷基础油。
通式(1)的化合物可用下式表示:
其中 R1 和 R2 相同或不同,且各自独立地选自 C2-25 烷基、
烯基、
环烷基和环
烯基组成的组。此外,R1 和 R2 中的一个可以是
氢原子。通式(2)的化合物可用下式表示:
其中 R3 是二价 C2-25 烃基;R4 和 R5 各自独立地选自由 C2-25 烷基、
烯基、
环烷基和环
烯基组成的组。