Low viscosity aromatic carbonate lubricating oil concentrates

Details Low viscosity aromatic carbonate lubricating oil concentrates Low viscosity aromatic carbonate lubricating oil concentrates

1990-02-26

1991-05-28

Howard, Jacqueline V.

Compositions

Electrolytes for electrical devices

252 52R, 252 56R, 252 515R, C10M14102

Patent

active

050192868

ABSTRACT:
According to the present invention, a process is provided for forming a lubricating oil concentrate containing aromatic carbonate which comprises admixing lubricating oil, aromatic carbonate and at least one aromatic carbonate solubilizing co-additive of the formula: ##STR1## wherein R.sup.1 is C.sub.1 to C.sub.20 substituted or unsubstituted hydrocarbyl, Ar is C.sub.6 to C.sub.20 aromatic group, and Z.sup.1 is a member selected from the group consisting of --(O)COR.sup.2, --N(R.sup.3)--T.sup.2, --X--T.sup.1, and --D.sup.1 --T.sup.3 wherein R.sup.2 is H or C.sub.1 to C.sub.20 hydrocarbyl, R.sup.3 is H or C.sub.1 to C.sub.6 hydrocarbyl, T.sup.2 is substituted or unsubstituted aryl, X is O or S, T.sup.1 is group of the formula: ##STR2## wherein Ar' is C.sub.6 to C.sub.20 aromatic group, Z.sup.2 is divalent C.sub.1 to C.sub.10 alkylene or C.sub.3 to C.sub.10 cycloalkylene, R.sup.4 is C.sub.1 to C.sub.20 substituted or unsubstituted hydrocarbyl, c' is 0 or 1, d is an integer of at least 1, and f' and b' are each integers of from 0 to 3, with the proviso that the sum of f' and b' does not exceed the unsatisfied valences of Ar', D.sup.1 is a C.sub.1 to C.sub.10 hydrocarbon linking group and T.sub.3 is an alkylene polyamine group, optionally substituted by one or more hydroxy-(optionally hydrocarby-substituted) aromatic groups, wherein f, b and c are each integers of from 0 to 3, with the proviso that the sum of f, b and c does not exceed the unsatisfied valences of Ar.

REFERENCES:
patent: 2340331 (1944-02-01), Knutson et al.
patent: 2387999 (1945-10-01), Knutson et al.
patent: 2739121 (1956-03-01), Morway et al.
patent: 2871191 (1956-01-01), Schott
patent: 4707284 (1987-11-01), Goldblatt et al.
patent: 4801391 (1989-01-01), Goldblatt et al.
patent: 4877541 (1989-10-01), Wisotsky et al.
Smalheer et al, "Lubricant Additives", Lezius-Hiles Co., 1967 pp. 8-11.

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