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Abstract

A lubricating oil for freezers, which is made of a polyether represented by the general formula (1): R.sup.1 --[X--OR.sup.4 ].sub.5, wherein R.sup.1 represents an s-valent group having an aromatic nucleus, X represents a divalent group consisting of --OR.sup.2 -- and --OR.sup.3 -- groups (the numbers of which are q and r, respectively, on average), R.sup.2 represents an ethylene group which may have a methyl group or ethyl group, R.sup.3 represents an ethylene group having an alkoxymethyl group in which the alkoxyl group has 1 to 4 carbon atoms, and R.sup.4 represents an alkyl group having 1 to 10 carbon atoms, s is an integer of 1 to 6, q is 0 to 6, r is at least 0.5, and (q+r).times.s is 3 to 80, and which has a high compatibility with HFC refrigerant, a high stability to the hydrolisis and a high volume resistivity.

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First Claim