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Title:
LUBRICANT FOR REFRIGERATING MACHINE WITH THE USE OF AMMONIA REFRIGERANT
Document Type and Number:
WIPO Patent Application WO/2000/005329
Kind Code:
A1
Abstract:
A lubricant for refrigerating machines with the use of an ammonia refrigerant which comprises at least one polyether represented by the general formula (I): X{-O-(AO)¿n?-H}¿p?, wherein X represents a residue obtained by eliminating hydroxyl from a monool or a polyol; (AO)¿n? is formed by the copolymerization of EO with AO having at least 3 carbon atoms; n is a number of 2 or more; and p represents the valence of X; wherein, among the hydroxyl groups at the terminal structure, secondary hydroxyl groups amount to at least 50 % of the total hydroxyl groups; or a polyether represented by the general formula (II): X{-O-(AO?1¿)¿a?-(AO?2¿)¿b?-H}¿p?, wherein X represents a residue obtained by eliminating hydroxyl from a monool or a polyol; (AO?1¿)¿a? represents polyoxyalkylene formed by the copolymerization of ethylene oxide and propylene oxide and/or butylene oxide; (AO?2¿)¿b? represents oxyalkylene having at least 3 carbon atoms; a is a number of 2 or more; b is a number of 1 or more; and p represents the valence of X.

Inventors:
NAMIKI MASATO (JP)
YAMAMOTO GORO (JP)
KAIMAI TAKASHI (JP)
TAKAHASHI HITOSHI (JP)
Application Number:
PCT/JP1999/003826
Publication Date:
February 03, 2000
Filing Date:
July 15, 1999
Export Citation:
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Assignee:
ASAHI DENKA KOGYO KK (JP)
JAPAN ENERGY CORP (JP)
NAMIKI MASATO (JP)
YAMAMOTO GORO (JP)
KAIMAI TAKASHI (JP)
TAKAHASHI HITOSHI (JP)
International Classes:
C10M107/34; C10M171/00; (IPC1-7): C10M107/34; C10N30/10; C10N40/30
Domestic Patent References:
WO1994012594A11994-06-09
Foreign References:
JPH059483A1993-01-19
JPH08100187A1996-04-16
Other References:
See also references of EP 1028156A4
Attorney, Agent or Firm:
Soga, Michiteru (8th Floor 1-1, Marunouchi 3-chome Chiyoda-ku Tokyo, JP)
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