1,1-dicyclohexyl cycloalkane derivative, method for the preparation thereof and traction-drive fluid containing the same
申请人:IDEMITSU KOSAN COMPANY LIMITED
公开号:EP0362673A1
公开(公告)日:1990-04-11
The invention provides a novel compound 1,1-dicyclohexyl cycloalkane derivative represented by the general formula
in which R¹ and R² are each a hydrogen atom or lower alkyl group, R³ to R⁶ are each a hydrogen atom, lower alkyl group or alkylene group forming a ring structure together with either one of the others and the carbon atom in the cycloalkane ring, and m and n are each zero or a positive integer not exceeding 6 with the proviso that m+n is 4-6, such as 1,1-dicyclohexyl cyclohexane. The compound has a relatively low viscosity and high traction coefficient even at elevated temperatures so that it is useful as a constituent of a traction-drive fluid usable in a compact and light-weight traction-drive apparatus. The compound can be synthesized by subjecting a corresponding 1,1-di(hydroxyphenyl) cycloalkane compound to a hydrogenation reaction and dehydration reaction in combination in the simultaneous presence of a hydrogenation catalyst and a dehydration catalyst.
本发明提供了一种新型化合物 1,1-二环己基环烷衍生物,其通式如下
其中R¹和R²各为氢原子或低级烷基,R³至R⁶各为氢原子、低级烷基或亚烷基,它们与环烷烃环中的碳原子或其中之一形成环状结构,m和n各为零或不超过6的正整数,但m+n为4-6,如1,1-二环己基环己烷。该化合物即使在高温下也具有相对较低的粘度和较高的牵引系数,因此可作为牵引驱动液的成分,用于结构紧凑、重量轻的牵引驱动装置中。在氢化催化剂和脱水催化剂同时存在的情况下,将相应的 1,1-二(羟基苯基)环烷烃化合物同时进行氢化反应和脱水反应,即可合成该化合物。