Title:
スルホネートおよびフェネートを含有する潤滑組成物
Document Type and Number:
Japanese Patent JP2007510049
Kind Code:
A
Abstract:
A lubricating composition containing: (a). at least 3 weight percent of an overbased sulphonate detergent with a metal ratio of about 12.5:1 to about 40:1; (b). at least 1.5 weight percent of a sulphur containing phenate detergent with a metal ratio of not more than 2.5; and (c). an oil of lubricating viscosity, wherein the sulphur containing phenate contains oligomers of hydrocarbyl phenol with at least 50 wt % of said oligomers in the form of the tetramer or higher oligomers. The composition is suitable for internal combustion engines, particularly marine diesel applications to provide improved cleanliness decreased cylinder wear and reduced deposits.
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Inventors:
Roski, James P.
Leafy, richard
Cook, stefan
Leafy, richard
Cook, stefan
Application Number:
JP2006538408A
Publication Date:
April 19, 2007
Filing Date:
October 29, 2004
Export Citation:
Assignee:
THE LUBRIZOL CORPORATION
International Classes:
C10M169/04; C10M135/30; C10M159/22; C10M159/24; C10M163/00; C10N10/02; C10N10/04; C10N30/04; C10N30/06; C10N40/25
Domestic Patent References:
| JPH0228294A | 1990-01-30 | |||
| JPH01236299A | 1989-09-21 | |||
| JPH09227503A | 1997-09-02 | |||
| JPS5476604A | 1979-06-19 |
Foreign References:
| EP0765931A1 | 1997-04-02 | |||
| US3793201A | 1974-02-19 |
Attorney, Agent or Firm:
Hidesaku Yamamoto
Takaaki Yasumura
Natsuki Morishita
Takaaki Yasumura
Natsuki Morishita