C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 105/08 (2006.01) C09K 5/04 (2006.01) C10M 107/34 (2006.01) C10M 171/00 (2006.01)
Patent
CA 2162229
A lubricating oil for refrigerating machines mainly comprises polyoxyalkylene compounds represented by the following formula (I); Image wherein A represents a residue obtained from a compound which has both a heterocyclic ring having an ether linkage and hydroxyl groups in the molecule by eliminating the hydroxyl groups from the compound; R1 and R2 are each an alkylene group; R3 is an alkyl group; R4 is hydrogen atom or an alkyl group; a and b are each a positive integer and ~, m and n are each an integer of 0 or more with the proviso that a~ ~ + b ~ m = 2 to 100 and ~ + m + n = 2 to 20; further, the polyoxyalkylene compounds satisfying the following two conditions: (a) the compounds have a hydroxyl value ranging from 0 mgKOH/g to 30.0 mgKOH/g and (b) a ratio of butylene groups of all alkylene groups represented by R1 and R2 to the all alkylene groups satisfies the following formula (1) 0.5 ~ p/(p + q) <= 1.0 (1) wherein "p" is the number of butylene groups, "q" is the number of alkylene groups excluding the butylene groups.
Ishida Noboru
Sasaki Umekichi
Suda Satoshi
Takigawa Katsuya
Nippon Mitsubishi Oil Corporation
Nippon Oil Co. Ltd.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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