Lubricating oil compositions for refrigerators
US4948525A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1989 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Mar 31, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/50
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A lubricating oil composition for a refrigerator using therein 1,1,1,2-tetrafluoroethane as the refrigerant, comprising as the base oil a polyoxyalkylene glycol monoether of the following general formula ##STR1## wherein R.sub.1 is an alkyl group having 1-18 carbon atoms, m is an integer of 5-70, R.sub.2 is an alkylene group having 2-4 carbon atoms and a ratio of 0-0.8 between (the number of --OR.sub.2 --group wherein R.sub.2 is ethylene group)/m in the molecule, the polyoxyalkylene glycol monoether having a specified pour point and a specified kinematic viscosity. In one embodiment, the lubricating oil composition may further comprise a specified phosphate and at least one kind of a specified epoxy compound to further improve the oil composition in properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.