Lubricant oil, polyalkylene glycol polycarbonates and process for preparing them
US5238590A · kind A · utility
10Cited by
13References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1990 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Sep 27, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2075/027
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides lubricant oil compositions comprising polyalkylene glycol polycarbonates. The lubricant oil compositions are useful as industrial gear oils, automotive gear oils, lubricant oils for refrigerators and rolling installations. The lubricant oils exhibit excellent lubricating properties and detergency and also have mutual solubility with an ozone layer nondestructive Freon such as R-134a. The lubricants of the present invention are especially suited for refrigerator systems using a hydrogenated fluorocarbon as a refrigerant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.