Lubricants for refrigeration systems
US8419968B2 · kind B2 · utility
4Cited by
9References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2009 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Oct 9, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/30
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A polyol ester suitable for use as a lubricant or a lubricant base stock has a kinematic viscosity at 40° C. less than or equal to 22 cSt and a viscosity index of greater than or equal to 140. The ester comprises a reaction product of (a) at least one polyhydric alcohol having at least 2 primary hydroxyl groups, (b) at least one monocarboxylic acid having 2 to 15 carbon atoms and (c) at least one polycarboxylic acid having 2 to 15 carbon atoms, wherein the number of acid groups derived from the polycarboxylic acid(s) is at least 25% of the total number of acid groups derived from the monocarboxylic and polycarboxylic acids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.