1,1-DICYCLOHEXYL CYCLOALKANE DERIVATIVE, METHOD FOR THE PREPARATION THEREOF AND TRACTION-DRIVE FLUID CONTAINING THE SAME

摘要

The invention provides a novel compound 1,1-dicyclohexyl cycloalkane derivative represented by the general formula <IMG> , in which R1 and R2 are each a hydrogen atom or lower alkyl group, R3 to R6 are each n 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.