LUBRICATING OIL COMPOSITION FOR REFRIGERATORS AND METHOD FOR LUBRICATION WITH THE COMPOSITION

Title:

LUBRICATING OIL COMPOSITION FOR REFRIGERATORS AND METHOD FOR LUBRICATION WITH THE COMPOSITION

Document Type and Number:

WIPO Patent Application WO/1998/023710

Kind Code:

A1

Abstract:

A lubricating oil composition which comprises (A) a refrigerant comprising a hydrocarbon having 1 to 8 carbon atoms as the main component and (B) a base oil comprising a hydrocarbon exhibiting a degree of non-aromatic unsaturation of 10 % or below and a kinematic viscosity of 5 mm?2�/s or above at 100 �C or a polyalkylene glycol derivative represented by general formula (I): R?1�O-(PO)�a?-(EO)�b?-R?2� (wherein R?1� and R?2� are each independently hydrogen, C�1?-C�10? alkyl or C�2?-C�10? acyl; PO is oxypropylene; EO is oxyethylene; and a and b are positive numbers including 0 and satisfying the relationship: 2 $m(F) a + b $m(F) 80); satisfying one of three specific formulae and exhibiting a kinematic viscosity of 5 to 200 mm?2�/s at 100 �C. This composition can attain effective lubrication in compression refrigeration cycles wherein refrigerants comprising hydrocarbons as the main component are used, thus improving the wear resistance, stability, lubrication performance and sealing properties and refrigeration efficiency.

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Inventors:

NAGAO SATOSHI (JP)
HANDA TOYOKAZU (JP)

Application Number:

PCT/JP1997/004173

Publication Date:

June 04, 1998

Filing Date:

November 17, 1997

Export Citation:

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Assignee:

IDEMITSU KOSAN CO (JP)
NAGAO SATOSHI (JP)
HANDA TOYOKAZU (JP)

International Classes:

C10M101/02; C09K5/04; (IPC1-7): C10M101/02; C10M105/04; C10M105/06; C10M105/18; C10M107/34; C09K5/04

Foreign References:

JPH08170586A	1996-07-02
JPH08209163A	1996-08-13
JPH08170586A	1996-07-02
JPS5876497A	1983-05-09
US4622825A	1986-11-18
DE9209459U1	1992-11-19

Other References: