Title:
【発明の名称】高性能エンジン油
Document Type and Number:
Japanese Patent JP2002540287
Kind Code:
A
Abstract:
High performance engine oils and other liquid lubricants comprise a liquid lubricant basestock of low viscosity from 1.5 to 12 cSt (100C) with two dissolved polymer components of differing molecular weights. The basestock is preferably a single PAO or blend of PAOs with a co-basestock component which is preferably an ester or an alkylated aromatic of comparable viscosity. The lower molecular weight polymer is highly viscoelastic in character and is preferably an HVI-PAO; this component in the lubricant which provides unexpectedly high film thickness and unexpectedly good wear protection under conditions where the second, higher molecular weight polymer may lose some or all of its thickening power. The use of the highly viscoelastic low molecular weight polymer in combination with the higher molecular weight thickener enables the production of very widely cross-graded engine oils, especially oils with a low temperature grading of 0W or better. Oils with cross gradings of 0W20, 0W30, 0W40 or even more widely cross graded, for example 0W70 or higher may be achieved.
Inventors:
Veil Large, David Jay
Bergstra, Raymond Jay
Andrew, Jackson
Johnston, Gee James
Maxwell, William Elle
Pache, Robert A
Bergstra, Raymond Jay
Andrew, Jackson
Johnston, Gee James
Maxwell, William Elle
Pache, Robert A
Application Number:
JP2000608707A
Publication Date:
November 26, 2002
Filing Date:
February 15, 2000
Export Citation:
Assignee:
MOBIL OIL CORPORATION
International Classes:
C10M105/06; C10M105/32; C10M107/02; C10M111/04; C10M143/00; C10M143/10; C10M143/12; C10M145/14; C10M169/04; C10N20/00; C10N20/02; C10N20/04; C10N30/02; C10N30/06; C10N30/08; C10N40/25; (IPC1-7): C10M169/04; C10M105/06; C10M105/32; C10M107/02; C10M143/00; C10M143/10; C10M143/12; C10M145/14
Domestic Patent References:
| JPS63210197A | 1988-08-31 | |||
| JPS63210198A | 1988-08-31 | |||
| JPS5989397A | 1984-05-23 | |||
| JPS6128591A | 1986-02-08 | |||
| JPS6128592A | 1986-02-08 | |||
| JPS6128593A | 1986-02-08 | |||
| JPS6128594A | 1986-02-08 | |||
| JPH04502775A | 1992-05-21 | |||
| JPH03505753A | 1991-12-12 |
Attorney, Agent or Firm:
Kazuo Shamoto (5 outside)