Title:
LUBRICATING OIL COMPOSITION
Document Type and Number:
Japanese Patent JP3928981
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a lubricating oil composition, capable of manifesting positive friction characteristics, having a specific friction coefficient, capable of suppressing a stick-slip phenomenon, excellent in durability and suitable for variable speed units, etc.
SOLUTION: This lubricating oil composition is obtained by blending (A) 100 pts.wt. mineral oil or synthetic oil with (B) one or more of a sulfurized ester in an amount of 0.1-0.15 pt.wt. expressed in terms of the sulfur content, a metallic salt-based cleaning agent in an amount of 0.005-1.0 pt.wt. expressed in terms of the metallic content, a zinc dialkyl dithiophosphate in an amount of 0.05-0.3 pt.wt. expressed in terms of the zinc content, a phosphoric ester in an amount of 0.03-0.1 pt.wt. expressed in terms of the phosphorus content and an imide compound in an amount of 0.01-0.1 pt.wt. expressed in terms of the nitrogen content and (C) 1-10 pts.wt. poly(meth)acrylates in order to improve the low-temperature fluidity. The composition is capable of manifesting positive frictional characteristics in which the friction coefficient measured from a frictional force at each sliding velocity by changing the sliding velocity within the range of 0-100cm/sec under 200lb vertical load shows an increase in frictional coefficient with increasing sliding velocity and has the friction coefficient at ≤2.5cm sliding velocity within the range of 0.12-0.14.
Inventors:
Kyoji Abe
Tetsuro Wakizono
Tetsuro Wakizono
Application Number:
JP26250295A
Publication Date:
June 13, 2007
Filing Date:
September 14, 1995
Export Citation:
Assignee:
Showa Shell Sekiyu Co., Ltd.
International Classes:
C10M161/00; C10M167/00; C10M133/16; C10M135/06; C10M137/02; C10M137/10; C10M145/14; C10M159/20; F16H57/04; C10N10/04; C10N20/00; C10N30/00; C10N30/02; C10N30/04; C10N30/06; C10N40/04; (IPC1-7): C10M161/00; //(C10M161/00; C10M129:10; C10M129:44; C10M129:54; C10M133:56; C10M135:06; C10M135:10; C10M137:04; C10M137:10; C10M137:12; C10M145:14); C10N10:04; C10N20:00; C10N30:02; C10N30:04; C10N30:06; C10N40:04
Domestic Patent References:
| JP2182787A | ||||
| JP2155987A | ||||
| JP93463A | ||||
| JP2175794A | ||||
| JP925491A |
Attorney, Agent or Firm:
Eiji Tomomatsu
Toshikazu Kawashima
Toshikazu Kawashima