1,1-dicyclohexyl cycloalkane derivative, method for the preparat

Details 1,1-dicyclohexyl cycloalkane derivative, method for the preparat 1,1-dicyclohexyl cycloalkane derivative, method for the preparat

1989-09-13

1992-04-21

Pal, Asok

Chemistry of hydrocarbon compounds

Compound or reaction product mixture

Alicyclic

252 9, 252 73, 585 21, C07C 1318, C07C 1324, C07C 1325, C07C 13271

Patent

active

051070413

ABSTRACT:
The invention provides a novel compound 1,1-dicyclohexyl cycloalkane derivative represented by the general formula ##STR1## in which R.sup.1 and R.sup.2 are each a hydrogen atom or lower alkyl group, R.sup.3 to R.sup.6 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.

REFERENCES:
patent: 4556503 (1985-12-01), Tsubouchi et al.
patent: 4604492 (1986-08-01), Shimizu et al.
patent: 4704843 (1988-11-01), Segnitz et al.

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