Title:
【発明の名称】剪断安定性を有する潤滑組成物
Document Type and Number:
Japanese Patent JPH10501835
Kind Code:
A
Abstract:
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.
Inventors:
Addams david robert
Bryce Paul
Bryce Paul
Application Number:
JP50162096A
Publication Date:
February 17, 1998
Filing Date:
June 12, 1995
Export Citation:
Assignee:
Exxon Chemical Limited
Exxon Chemical Patents Incorporated
Exxon Chemical Patents Incorporated
International Classes:
C10M157/00; C10M161/00; C10M171/02; C10M171/04; (IPC1-7): C10M171/04; C10M157/00; C10M171/02
Attorney, Agent or Firm:
Minoru Nakamura (6 outside)