Lubricating compositions comprising an anti-wear/friction modifying agent
AssigneeThe Lubrizol Corporation
InventorsEdward P. Sampler, Mark J. McGuiness, William R. S. Barton, Deborah Kays, Nicolas I. Nouvel, Gary M. Walker, Katherine M. Shaw
Life of this patent
Estimating the term…
Abstract
A phosphate complex of a borate ester provides wear- and friction-reducing performance to an engine or driveline device. The complex may be a pyroborate-hydrocarbyl-substituted phosphate adduct. Boric acid may be reacted with a diol to form an ester, then reacting said ester with an ammonium salt of phosphoric acid or a hydrocarbyl-substituted phosphoric acid.
Claims18
A composition comprising an oil of lubricating viscosity and a compound of formula (I):
- wherein x+y=4, x is an integer from 1 to 4, y is 0 or an integer from 1 to 3, and each R1 is independently a hydrocarbyl group having from about 4 to about 22 carbon atoms;
- R1 and R2 are each independently hydrogen or a hydrocarbyl group containing from about 4 to about 22 carbon atoms, and
- on each ring substituted with R3 to R6 independently,
- (i) n is 0 or 1, one of R3 and R4 is CH2—O—C(O)—R7 where R7 is a hydrocarbyl group containing from about 8 to about 30 carbon atoms, and the other of R3 and R4, and each of R5 and R6 is chosen from hydrogen or a methyl group;
- or
- (ii) n is 0 or 1, one of R3 and R4 is a hydrocarbyl group containing from about 4 to about 22 carbon atoms and the other of R3 and R4 is independently a hydrocarbyl group containing from about 4 to about 22 carbon atoms or hydrogen, and each of R5 and R6 is hydrogen;
- or
- (iii) n is 0, R3 and R4 are linked, together with the carbons to which they are attached, to form a benzene ring which is substituted with a hydrocarbyl group R7 containing from about 12 to about 100 carbon atoms, and R5 and R6 are not present.
A composition comprising an oil of lubricating viscosity and a compound obtainable by reacting boric acid with a diol to form an ester and reacting said ester with an ammonium salt of phosphoric acid or a hydrocarbyl-substituted phosphoric acid, wherein said diol:
- (i) is a partial ester diol having the formula R3(OH)CR6—(CH2)n—CR5R4(OH) where n is 0 or 1, one of R3 and R4 is —CH2—O—C(O)—R7, R7 is a hydrocarbyl group containing from about 8 to about 30 carbon atoms, and the other of R3 and R4 and each of R5 and R6 is hydrogen or a methyl group, or
- (ii) is a hydrocarbyl-containing diol having the formula R3(OH)CR6—(CH2)n—CR5R4(OH) where n is 0 or 1, one of R3 and R4 is a hydrocarbyl group containing from about 4 to about 22 carbon atoms and the other of R3 and R4 is independently a hydrocarbyl group containing from about 4 to about 22 carbon atoms or hydrogen, and each of R5 and R6 is hydrogen or a methyl group, or
- (iii) is an aromatic diol substituted with a hydrocarbyl group, wherein the hydrocarbyl group contains from about 12 to about 100 carbon atoms.
Dependencies are inferred from the claim text.