Flame retardant hydraulic oil containing a partial ester of a polyol and a monocarboxylic acid
US6402983B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1995 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Jul 11, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/50
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed herein is a flame retardant hydraulic oil excellent in the flame retardancy, unaccompanied by the dangers of pinhole fire at sites of use and giving rise to no environmental contamination.This flame retardant hydraulic oil contain a hydraulic base oil comprising as the essential component an polyol partial ester which is a product formed by reacting (A) a polyol having a total of 6 to 22 carbon atoms and a total of 3 to 6 hydroxyl groups with (B) an acyclic monocarboxylic acid having a total of 6 to 22 carbon atoms. Said polyol partial ester has a hydroxyl value of 35 mg KOH/g or more, a flash point of 290° C. or higher and an average molecular weight of 600 to 1,500.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.