Title:
LUBRICATING OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2007/132626
Kind Code:
A1
Abstract:
A lubricating oil composition for use in oil-impregnated bearings to be used in combination with a resinous member having C=C bonds or C=O groups in the molecule. It comprises a base oil comprising a synthetic hydrocarbon oil as the main ingredient and an ester base oil, the amount of the ester base oil being 0.1-30 wt.% based on the whole composition, and contains neither a zinc dialkyl dithiophosphate nor a molybdenum dialkyldithiocarbamate. This lubricating oil composition is one which contains a synthetic hydrocarbon oil as a major ingredient and has satisfactory resistance to resins. The composition is effective in minimizing the amountof a wearing inhibitor or extreme-pressure additive to be incorporated therein while retaining intact satisfactory lubricity, which is required of oils for sintered oil-impregnated bearings. Thus, it becomes possible to minimize the influence of these on various metals of sintered materials.
Inventors:
HASHIDA MIYUKI (JP)
SAWAGUCHI WATARU (JP)
NITTA TOSHIO (JP)
SAWAGUCHI WATARU (JP)
NITTA TOSHIO (JP)
Application Number:
PCT/JP2007/058441
Publication Date:
November 22, 2007
Filing Date:
April 18, 2007
Export Citation:
Assignee:
NOK KLUBER CO LTD (JP)
HASHIDA MIYUKI (JP)
SAWAGUCHI WATARU (JP)
NITTA TOSHIO (JP)
HASHIDA MIYUKI (JP)
SAWAGUCHI WATARU (JP)
NITTA TOSHIO (JP)
International Classes:
C10M105/02; C10M105/32; C10M105/36; C10M107/02; C10M169/04; C10M129/74; C10M137/04; C10N30/00; C10N30/06; C10N30/12; C10N40/02; F16C33/10
Foreign References:
| JP2001172656A | 2001-06-26 | |||
| JPH09125086A | 1997-05-13 | |||
| JP2000336384A | 2000-12-05 | |||
| JPH06306383A | 1994-11-01 | |||
| JPS6128592A | 1986-02-08 | |||
| JPS56116744A | 1981-09-12 |
Attorney, Agent or Firm:
YOSHIDA, Toshio et al. (No. 401 Mirum Shiroganedai Bldg.,1-4, Kami-Osaki 1-chome,Shinagawa-ku, Tokyo, JP)
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