Claims
- 1. A method of improving the antiwear and friction performance of a continuously variable transmission fluid comprising a major amount of lubricating oil by incorporating into the fluid an antiwear improving effective amount of an additive combination consisting essentially of:(a) an amine phosphate which is a neutralization or partial neutralization product of an aliphatic primary amine and a hydroxy-substituted triester of a phosphorothioic acid treated with an inorganic phosphorus reagent, where the triester is prepared (i) by reaction of a phosphorothioic acid with an aliphatic epoxide having less than 8 carbon atoms, styrene oxide a glycol, or an unsaturated alcohol or (ii) by the reaction of a metal phosphorothioate with a halogen-substituted alcohol; (b) a sulfurized polyisobutylene; (c) a zinc salt of a phosphorothioic acid ester; and (d) a friction modifier.
- 2. The method of claim 1 where the lubricating oil is a mineral oil, poly-α-olefin, or mixtures thereof.
- 3. The method of claims 1 or 2 where the friction modifier is a full or partial alcoholic ester of a mono or polycarboxylic acid.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9521352 |
Oct 1995 |
GB |
|
Parent Case Info
This application is a 371 of PCT/EP96/04450 filed Oct. 11, 1996.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/EP96/04450 |
|
WO |
00 |
3/9/1998 |
3/9/1998 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO97/14770 |
4/24/1997 |
WO |
A |
US Referenced Citations (3)