Lubricant composition for ammonia refrigerants used in compression refrigeration systems
US5595678A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1994 |
| Grant date | Jan 21, 1997 |
| Priority date | — |
| Expiry date | Aug 30, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/50
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A fluid composition of suitable miscibility and solubility in ammonia, chlorofluorocarbon, hydrochlorofluorocarbon, and hydrofluorocarbon refrigerants includes and a refrigerant selected from the group consisting essentially of ammonia, chlorofluorocarbons, hydrochlorofluorocarbons, and hydrofluorocarbon refrigerants and a lubricant composition made with an organic oxide and an alcohol and comprises a polyalkylene glycol of the formula: EQU Z--((CH.sub.2 --CH(R.sub.1)--O).sub.n --(CH.sub.2 --CH(R.sub.1)--O--).sub.m).sub.p --H wherein PA1 Z is a residue of a compound having 1-8 active hydrogens and a minimum number of carbon atoms of six (6) carbons where Z is an aryl group and a minimum number of carbon atoms of ten (10) where Z is an alkyl group, PA1 R.sub.1 is hydrogen, methyl, ethyl, or a mixture thereof, PA1 N is 0 or a positive number, PA1 M is a positive number, and PA1 P is an integer having a value equal to the number of active hydrogen of Z.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.