润滑科技信息平台

Friction modifier composition for lubricants

专利摘要

Combining a metal based friction modifier, such as a molybdenum dialkyldithiocarbamate, and certain esters of hydroxy carboxylic acids, such as short chain alkyl esters of citric or tartaric acid, e.g., tributyl citrate, has a synergistic effect on lowering the friction coefficient of lubricating oils allowing one to reduce the amount of metal based friction modifier needed to adequately formulate a lubricant with low friction characteristics. ......

基本信息

专利类型:
发明专利
申请/专利号:
US13/780511
申请日期:
2013-02-28
专利申请人:
["DEBLASE FR J","MADABUSI VENKASTREETCARANAN K","FERRAROTTI SUSAN","GAENZLER FAITH","MIGDAL CYRIL A","MULQUEEN GERARD"]
分类号:
["C10M141/08","C10M141/02","C10M141/10","C10M169/04","C10M135/18","C10M129/72","C10M141/06"]
发明/设计人:
DEBLASE, FRANK J. ， MADABUSI, VENKATRAMANAN K. ， FERRAROTTI, SUSAN ， GAENZLER, FAITH ， MIGDAL, CYRIL A. ， MULQUEEN, GERARD
权利要求: 1. A lubricant composition comprising:A) 70 wt % or more of a synthetic poly alphaolefin lubricating oil, andB) from about 0.5 to about 1.5 wt %, based on the weight of the lubricant composition, of a mixture ofi) a metal based friction modifier selected from the group consisting of molybdenum dialkyldithiocarbamates, andii) a hydroxy carboxylic esterselected from the group consisting of triethyl citrate, tripropyl citrate and tributyl citrate;wherein i) and ii) are present in a weight ratio of metal based friction modifier i) to hydroxy carboxylic ester ii) of about 1:1 based on the total weight of metal based friction modifier i) and hydroxy carboxylic ester ii).2. The lubricant composition according to claim 1 further comprising one or more additional lubricant additive (C) selected from the group consisting of dispersants, detergents, corrosion/rust inhibitors, antioxidants, anti-wear agents, anti-foamants, friction modifiers, seal swell agents, demulsifiers, V.I improvers and pour point depressants.3. The lubricant composition according to claim 1 wherein the synthetic poly alphaolefin lubricating oil is present from about 90 to about 99.5 wt %.4. The lubricant composition according to claim 2 wherein the synthetic poly alphaolefin lubricating oil is present from about 95 to about 99 wt % and the combined amount of B) and C) is from about 1 to about 5 weight percent based on the total weight of the lubricant composition.