Title:
LUBRICATING OIL COMPOSITION FOR REFRIGERATOR, WORKING FLUID AND REFRIGERATOR
Document Type and Number:
WIPO Patent Application WO/2001/036571
Kind Code:
A1
Abstract:
A lubricating oil composition for a refrigerator using a hydrofluorocarbon coolant, characterized as comprising, as a main component, a mixture comprising (a) an ester compound and (b) a mineral oil component in a weight ratio (a)/(b) of from 9/1 to 2/8, wherein the ester compound (a) is a polyol ester or a complex ester compound prepared from a neopentyl polyol and a monocarboxylic acid and/or a dicarboxylic acid, and the mineral oil component (b) has a % Cp of 70 % or less as measured by the n-d-M ring analysis and a temperature corresponding to 50 % distillation of 400°C or lower as measured by the gas chromatograph distillation method and a pour point of -30°C or lower. The lubricating oil composition is excellent in the compatibility with the above coolant, lubricativity, and electrical insulating property, and is reduced in the absorptivity for moisture and hydrolyzability, and further is excellent with respect to the property of dissolving impurities and the property of returning to a compressor in a refrigerator.
Inventors:
KAIMAI TAKASHI (JP)
TAKAHASHI HITOSHI (JP)
TAKAHASHI HITOSHI (JP)
Application Number:
PCT/JP2000/007805
Publication Date:
May 25, 2001
Filing Date:
November 07, 2000
Export Citation:
Assignee:
JAPAN ENERGY CORP (JP)
KAIMAI TAKASHI (JP)
TAKAHASHI HITOSHI (JP)
KAIMAI TAKASHI (JP)
TAKAHASHI HITOSHI (JP)
International Classes:
F25B1/00; C09K5/04; C10M101/02; C10M105/38; C10M111/02; C10M171/00; C10N20/00; C10N30/00; C10N40/30; (IPC1-7): C10M111/02; C09K5/04; F25B1/00
Foreign References:
| JPH01161089A | 1989-06-23 | |||
| JPH09208980A | 1997-08-12 | |||
| JPH08311471A | 1996-11-26 | |||
| JPH09143486A | 1997-06-03 |
Other References:
See also references of EP 1231255A4
Attorney, Agent or Firm:
Fujino, Seiya (8F 2-1, Yotsuya 1-chom, Shinjuku-ku Tokyo, JP)
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