Refrigeration lubricant for hydrofluorocarbon refrigerants
US6736991B1 · kind B1 · utility
6Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2003 |
| Grant date | May 18, 2004 |
| Priority date | — |
| Expiry date | Feb 12, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2030/43
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A fluid refrigeration composition is disclosed that comprises a naphthenic mineral oil lubricant, a hydrofluorocarbon refrigerant that is immiscible with the naphthenic mineral oil lubricant, and an effective amount of at least one nonionic surfactant; wherein said surfactant has a Hydrophilic-Lipophilic Balance in the range of from about 9.8 to about 11.8, is completely soluble in the naphthenic mineral oil lubricant, and has a low pour point; and wherein the blend of surfactant and lubricant is completely clear and transparent and has a low pour point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.