Sulfur-containing lubricant and functional fluid compositions

US4800031A · kind A · utility

Assignee

• The Lubrizol Corporation · US

Inventors

• Stephen A. DiBiase · Chicago, US
• Joseph W. Pialet · Euclid, US

Key dates

• Filing date: Nov 7, 1986
• Grant date: Jan 24, 1989
• Expiry date: Nov 7, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2070/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

This invention is directed to lubricating and functional fluid compositions having improved antioxidant and extreme pressure properties and high temperature stability. The lubricant and functional fluid compositions comprise a major amount of at least one oil of lubricating viscosity and a minor amount of PA1 (A) a sulfur compound characterized by the structural formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each independently H or hydrocarbyl groups; PA1 R.sup.1 and/or R.sup.3 may be G.sup.1 or G.sup.2 ; PA1 R.sup.1 and R.sup.2 and/or R.sup.3 and R.sup.4 together may be alkylene groups containing about 4 to about 7 carbon atoms; PA1 G.sup.1 and G.sup.2 are each independently C(X)R, COOR, C.tbd.N, R.sup.5 --C.dbd.NR.sup.6, CON(R).sub.2 or NO.sub.2, and G.sup.1 also ay be a CH.sub.2 OH group, wherein X is O or S, R.sup.5 and each R are independently H or a hydrocarbyl group, R.sup.6 is H or a hydrocarbyl group; PA1 when both G.sup.1 and G.sup.2 are R.sup.5 C.dbd.NR.sup.6, the two R.sup.6 groups together may be a hydrocarbylene group linking the two nitrogen atoms; PA1 when G.sup.1 is CH.sub.2 OH and G.sup.2 is COOR, a lactone may be formed by intramolecular combi…