基本信息:
- 专利标题： SHEAR STABLE LUBRICATING COMPOSITIONS
- 专利标题（中）：SCHERSTABILE SCHMIERMITTELZUSAMMENSETZUNGEN
- 申请号：EP95923314.0 申请日：1995-06-12
- 公开(公告)号：EP0765371A1 公开(公告)日：1997-04-02
- 发明人： ADAMS, David R. , BRICE, Paul
- 申请人： EXXON CHEMICAL LIMITED , EXXON CHEMICAL PATENTS INC.
- 申请人地址： Exxon Chemical Technology Centre P.O. Box 1 Abingdon, Oxfordshire OX13 6BB GB
- 专利权人： EXXON CHEMICAL LIMITED,EXXON CHEMICAL PATENTS INC.
- 当前专利权人： EXXON CHEMICAL LIMITED,EXXON CHEMICAL PATENTS INC.
- 当前专利权人地址： Exxon Chemical Technology Centre P.O. Box 1 Abingdon, Oxfordshire OX13 6BB GB
- 代理机构： Mansell, Keith Rodney, et al
- 优先权： GB19940012063 19940616; GB19940012102 19940616
- 国际公布： WO1995034617 19951221
- 主分类号： C10M157
- IPC分类号： C10M157 ; C10M161 ; C10M171
摘要：
This invention relates to shear stable lubricating compositions, particularly multigrade oils for crankcase lubrication of gasoline and diesel engines. Multigrade crankcase oils are formulated with an ashless dispersant comprising an oil soluble polymeric hydrocarbon backbone having functional groups in which the hydrocarbon backbone is derived from an ethylene alpha-olefin (EAO) copolymer or alpha-olefin homo- or copolymer having an M n of from 500 to 7000. They provide better fuel economy and better starting at cold temperatures. More economical multigrade crankcase oils may also be blended with less shear stable VMs for improved economy, with a possibility of employing a wider range of polymers. Oils may be blended having extremely good oil shear stability for the most demanding applications where high performance is required such as in turbocharged engines and racing engines, with reduced mechanical breakdown of the oil.