EP 0765371 A1 19970402 - SHEAR STABLE LUBRICATING COMPOSITIONS
Title (en)
SHEAR STABLE LUBRICATING COMPOSITIONS
Title (de)
SCHERSTABILE SCHMIERMITTELZUSAMMENSETZUNGEN
Title (fr)
COMPOSITIONS LUBRIFIANTES STABLES AU CISAILLEMENT
Publication
Application
Priority
- EP 9502270 W 19950612
- GB 9412063 A 19940616
- GB 9412102 A 19940616
Abstract (en)
[origin: WO9534617A1] 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 <o>M</o>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.
IPC 1-7
IPC 8 full level
C10M 157/00 (2006.01); C10M 161/00 (2006.01); C10M 171/02 (2006.01); C10M 171/04 (2006.01)
CPC (source: EP)
C10M 129/95 (2013.01); C10M 133/52 (2013.01); C10M 143/00 (2013.01); C10M 143/04 (2013.01); C10M 143/12 (2013.01); C10M 161/00 (2013.01); C10M 2205/00 (2013.01); C10M 2205/02 (2013.01); C10M 2205/024 (2013.01); C10M 2205/026 (2013.01); C10M 2205/06 (2013.01); C10M 2205/20 (2013.01); C10M 2207/34 (2013.01); C10M 2209/084 (2013.01); C10M 2209/086 (2013.01); C10M 2215/04 (2013.01); C10M 2215/24 (2013.01); C10M 2215/26 (2013.01); C10M 2217/046 (2013.01); C10M 2217/06 (2013.01); C10M 2227/061 (2013.01); C10N 2040/25 (2013.01); C10N 2040/251 (2020.05); C10N 2040/255 (2020.05); C10N 2040/28 (2013.01)
C-Set (source: EP)
C10M 161/00 + C10M 129/95 + C10M 133/52 + C10M 143/00 + C10M 143/04 + C10M 143/12
Citation (search report)
See references of WO 9534617A1
Designated contracting state (EPC)
BE DE ES FR GB IT NL
DOCDB simple family (publication)
WO 9534617 A1 19951221; AU 2791395 A 19960105; AU 689911 B2 19980409; CA 2193124 A1 19951221; EP 0765371 A1 19970402; JP H10501835 A 19980217
DOCDB simple family (application)
EP 9502270 W 19950612; AU 2791395 A 19950612; CA 2193124 A 19950612; EP 95923314 A 19950612; JP 50162096 A 19950612