Block copolymer oil return agents
US8623235B2 · kind B2 · utility
1Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2009 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Mar 27, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/30
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to fluorine free polymeric oil-return agents that increase the miscibility of lubricants such as mineral oils and/or oxygenated lubricants with refrigerants in order to improve oil return and system performance of refrigeration systems. It was discovered that fluorine free block copolymers having a block compatible with the oil phase, and at least one block compatible with the refrigerant phase can effectively compatibilize lubricating oils with HFC and HFO refrigerants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.