Patent ID: 6242393
Filing Date: 2001-06-05
Classification: C10M

Abstract:
A traction drive fluid which comprises a tractant selected from the group consisting of naphthenic hydrocarbons (A) and (B), naphthenic carboxylates (C) and (D) and a naphthenic carbonate (E),said naphthenic hydrocarbon (A) being represented by the formula ##STR65##wherein among R.sup.1 through R.sup.8, R.sup.4 is a C.sub.1 -C.sub.8 alkyl group which may have a naphthene ring and the remainders each are a hydrogen atom or a C.sub.1 -C.sub.8 alkyl group which may have a naphthene ring;said naphthenic hydrocarbon (B) being represented by the formula ##STR66##wherein R.sup.9 through R.sup.20 each are a hydrogen atom or a C.sub.1 -C.sub.8 alkyl group which may have a naphthene ring, at least more than two members selected arbitrarily from R.sup.12, R.sup.13 and R.sup.16 each are a C.sub.1 -C.sub.8 alkyl group which may have a naphthene ring, at least one member selected arbitrarily from R.sup.9, R.sup.11, R.sup.18 and R.sup.20 is a C.sub.1 -C.sub.8 alkyl group which may have a naphthene ring;said naphthenic carboxylate (C) being represented by the formula ##STR67##wherein R.sup.21, R.sup.22, R.sup.23, R.sup.24, R.sup.25 and R.sup.26 each are a hydrogen atom or a C.sub.1 -C.sub.8 alkyl group which may have a naphthene ring;said naphthenic carboxylate (D) being represented by the formula ##STR68##wherein R.sup.27, R.sup.28, R.sup.29, R.sup.30, R.sup.31 and R.sup.32 each are a hydrogen atom or a C.sub.1 -C.sub.8 alkyl group which may have a naphthene ring; andsaid naphthenic carbonate (E) being represented by the formula ##STR69##wherein R.sup.33, R.sup.34, R.sup.35, R.sup.36, R.sup.37 and R.sup.38 each are a hydrogen atom or a C.sub.1 -C.sub.8 alkyl group which may have a naphthene ring.