Functional fluids
US4919833A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 9, 1988 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | May 9, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A functional fluid comprising: PA1 (a) a base fluid selected from one or more of (i) a phosphate fluid and (ii) a carboxylic acid ester; and PA1 (b) as hydrolytic stabilizer, at least one compound having the formula I: EQU A--NHC(.dbd.X)NHZ (I), PA1 in which PA2 A is hydrogen, C.sub.1 -C.sub.23 alkyl, C.sub.3 -C.sub.18 alkenyl, C.sub.6 -C.sub.10 aryl, C.sub.7 -C.sub.13 alkaryl, C.sub.7 -C.sub.13 aralkyl or C.sub.5 -C.sub.12 cycloalkyl; PA2 X is oxygen, sulphur or NH; and PA2 Z is H, NH.sub.2 or --N.dbd.CR.sub.1 R.sub.2 in which R.sub.1 and R.sub.2, independently, have any of the meanings assigned to A, or R.sub.2 is H, or R.sub.1 and R.sub.2, together with the carbon atom to which they are each attached, may form a C.sub.5 -C.sub.12 ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.