Refrigerant incorporating a polyoxyalkylene glycol monomethylether
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United States of America Patent
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Apr 17, 2001
Grant Date -
N/A
app pub date -
Dec 17, 1992
filing date -
Dec 18, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The object of the present invention is to provide a lubricant for refrigerators having good compatibility with chlorine-free Flon-type coolants, good lubricity and resistant to hygroscopicity and a composition for refrigerators using this lubricant. This lubricant contains a monomethylether of polyoxyethyleneoxypropyleneglycol where the end group at the hydrogen terminal is an oxyethylene group, represented by the following general formula (1): CH.sub.3 O(AO).sub.m (CH.sub.2 CH.sub.2 O).sub.n H wherein the AO group represents oxypropylene group, or copolymeric group of oxypropylene groups and oxyethylene groups wherein the copolymeric form may be a block type and/or a random type, m is a number of 1.ltoreq.m.ltoreq.50, n is a number of 1.ltoreq.n.ltoreq.10, and the content of the oxyethylene group in the compound ranges from 5 to 60 percent by weight. A composition for refrigerators using said lubricant is also provided.
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