Power transmission fluids of improved anti-shudder properties

US6660695B2 · kind B2 · utility

Assignee

• Infineum International Limited · GB

Inventors

• Raymond F. Watts · Long Valley, US
• Katherine M. Richard · Fanwood, US

Key dates

• Filing date: Mar 15, 2002
• Grant date: Dec 9, 2003
• Expiry date: May 1, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2060/14
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A power transmission fluid comprising a mixture of a major amount of a lubricating oil and an effective amount of a performance enhancing additive combination comprising: (a) at least one organic phosphate having the structure R1—X2—P(:X1)(R2X3)—X—R5 where R1, and R2 may independently be substituted or unsubstituted alkyl, aryl, alkylaryl or cycloalkyl having 1 to 24 carbon atoms and X, X1, X2 and X3 may independently be sulfur or oxygen. R1 and R2 may also contain substituent hetero atoms, in addition to carbon and hydrogen, such as chlorine, sulfur, oxygen or nitrogen; wherein R5 is derived from a reactive olefin and can be either CH2—CHR—C(:O)O—R6; —CH2—CR7HR8; or R9—OC(:O)CH2—CH—C(:O)O—R10 where R is H or the same as R1, R6, R7, R9 and R10 are the same as R1 and R8 is a phenyl or alkyl or alkenyl substituted phenyl moiety, the moiety having from 6 to 30 carbon atoms, (b) a calcium detergent, and (c) a friction modifier.