Title:
LUBRICATING COMPOSITIONS CONTAINING SULPHONATE AND PHENATE
Document Type and Number:
Japanese Patent JP2011236444
Kind Code:
A
Abstract:
To provide compositions with cleanliness properties.
A lubricating composition contains: (a) at least 3 wt.% of an overbased sulphonate detergent with a metal ratio of 12.5:1 to 40:1; (b) at least 1.5 wt.% of a sulphur-containing phenate detergent with a metal ratio of not more 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 the oligomers in the form of the tetramer or higher oligomers. The composition is suitable for internal combustion engines, particularly marine diesel applications to achieve improved cleanliness, decreased cylinder wear, and reduced deposits.
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Inventors:
COOK STEPHEN
LEAHY RICHARD
MAYHEW ALEXANDRA
LEAHY RICHARD
MAYHEW ALEXANDRA
Application Number:
JP2011189986A
Publication Date:
November 24, 2011
Filing Date:
August 31, 2011
Export Citation:
Assignee:
LUBRIZOL CORP:THE
International Classes:
C10M169/04; C10M129/10; C10M129/54; C10M129/76; C10M133/16; C10M135/18; C10M135/20; C10M137/08; C10M139/00; C10M159/22; C10M159/24; C10M163/00; C10N20/00; C10N30/00; C10N30/06; C10N40/25; C10N40/26
Attorney, Agent or Firm:
Hidesaku Yamamoto
Takaaki Yasumura
Natsuki Morishita
Takaaki Yasumura
Natsuki Morishita