Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Organic phosphorus compound – wherein the phosphorus is...
Patent
1995-06-16
1997-04-22
Willis, Jr., Prince
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Organic phosphorus compound, wherein the phosphorus is...
508186, 508433, 508436, 508569, C10M13710
Patent
active
056229232
ABSTRACT:
This invention relates to a lubricating composition comprising a major amount of an oil of lubricating viscosity and at least one metal-free thiophosphorus acid ester, at least one amine salt of the thiophosphorus acid ester, or a mixture thereof, wherein the thiophosphorus acid ester contains at least one hydrocarbyl terminated oxyalkylene group, at least one hydrocarbyl terminated polyoxyalkylene group, or a mixture thereof. In one embodiment, the thiophosphorus acid ester is a thiophosphorus acid ester represented by the following formula ##STR1## wherein X.sub.1, X.sub.2, and X.sub.3 are oxygen or sulfur, provided that at least one of X.sub.1, X.sub.2, and X.sub.3 is sulfur; R.sub.1 is a hydrocarbyl group; R.sub.2 is an alkylene group; R.sub.3 is hydrogen or a hydrocarbyl group; x is a number from 1 to about 40; and a is 0, 1, or 2, or at least one salt of the thiophosphorus acid ester. The lubricating compositions, functional fluids and greases have improved antiwear/extreme pressure properties and improved antioxidation properties. In functional fluids, the thiophosphorus acid esters and their salts act as antiwear agents and rust inhibitors.
REFERENCES:
patent: 2905683 (1959-09-01), Goldsmith
patent: 3214423 (1965-10-01), Zech
patent: 3337654 (1967-08-01), Cyba
patent: 4044032 (1977-08-01), Wiley et al.
patent: 4259192 (1981-03-01), Lilburn
patent: 4579672 (1986-04-01), Brecker et al.
patent: 4814097 (1989-03-01), Cardis
patent: 4997968 (1991-03-01), Burjes et al.
patent: 5342531 (1994-08-01), Walters et al.
Smallheer, C., and R.K. Smith, Lubricant Additives .Cleveland Ohio: Lezius-Hiles Co., 1967. (month unknown).
Mathur Naresh C.
Raguz Mary G.
Connors William J.
Engelmann John H.
Hunter Frederick D.
The Lubrizol Corporation
Toomer Cephia D.
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