Lubricating oil and composition for refrigerating machine, and refrigerating machine
US5746933A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1995 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | Nov 3, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/50
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A lubricating oil for refrigerating machines comprises polyoxyalkylene compounds represented by the formula (I): ##STR1## Wherein A is a residue obtained from a compound which has both a heterocyclic ring having an ether linkage therein and hydroxyl groups by eliminating the hydroxyl groups from the compound; R.sup.1 and R.sup.2 are each an alkylene group; R.sup.3 is an alkyl group; R.sup.4 is hydrogen atom or an alkyl group; a and b are each a positive integer and l, m, and n are each an integer of 0 or more; and a.multidot.1+b.multidot.m=2 to 100 and l+m+n=2 to 20; further, PA1 the polyoxyalkylene compounds have a hydroxyl value ranging from 0 to 30.0 mgKOH/g and satisfies the following formula (1) EQU 0.5<p/(p+q)<1.0 (1) PA1 wherein p is the number of butylene groups represented by R.sup.1 and R.sup.2, and q is the number of all alkylene groups excluding the butylene groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.