Title:
SYSTEM LUBRICANT COMPOSITION FOR CROSSHEAD DIESEL ENGINES
Document Type and Number:
WIPO Patent Application WO/2014/103244
Kind Code:
A1
Abstract:
As a system lubricant for crosshead diesel engines, which has excellent cleanness at high temperatures and excellent coking resistance and which produces less deposit even if a base oil having a high saturated hydrocarbon content is used, the present invention provides: (i) a lubricant composition which is obtained by blending (B) a metal-based detergent and (C) zinc dithiophosphate into (A) a base oil having a kinematic viscosity at 100°C of 8.2-12.6 mm2/s and a saturated hydrocarbon content of 90% by mass or more, and which contains the metal-based detergent (B) in an amount of 2.5 mmol or more, in terms of soap content concentration, per 100 g of the composition, while having a phosphorus content of 200-1,000 ppm by mass and a base number of 7.5 mgKOH/g or more; and (ii) a lubricant composition which is obtained by blending (B) a metal-based detergent, (C) zinc dithiophosphate and (E) an amine antioxidant into the above-described base oil (A), and which contains the amine antioxidant (E) in an amount of 0.3% by mass or more based on the total amount of the composition, while having a base number of 6.5 mgKOH/g or more and a phosphorus content of 200-1,000 ppm by mass.
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Inventors:
TAKESHIMA SHIGEKI (JP)
Application Number:
PCT/JP2013/007413
Publication Date:
July 03, 2014
Filing Date:
December 17, 2013
Export Citation:
Assignee:
JX NIPPON OIL & ENERGY CORP (JP)
International Classes:
C10M169/04; C10M101/02; C10M133/54; C10M133/56; C10M137/10; C10M159/22; C10N10/04; C10N20/00; C10N20/02; C10N30/04; C10N30/08; C10N40/25
Foreign References:
| JP2011032406A | 2011-02-17 | |||
| JP2006241436A | 2006-09-14 | |||
| JP2007246659A | 2007-09-27 | |||
| JP2007231115A | 2007-09-13 | |||
| JP2010523733A | 2010-07-15 | |||
| JP2002275491A | 2002-09-25 | |||
| JP2009185293A | 2009-08-20 | |||
| JP2010519376A | 2010-06-03 | |||
| JP2011074387A | 2011-04-14 |
Other References:
See also references of EP 2944682A4
Attorney, Agent or Firm:
SUGIMURA, KENJI (JP)
Kenji Sugimura (JP)
Kenji Sugimura (JP)
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