N-substituted tetrahydroquinolines for use as antioxidants in lubricants
US4828741A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1987 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Dec 21, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Composition containing PA0 (a) at least one lubricant, hydraulic oil or metal-working fluid based on mineral oil or synthetic oils and PA0 (b) 0.05-5% by weight, based on the total weight of the lubricant, hydraulic oil or metal-working fluid composition, of at least one compound of the formula II ##STR1## where R.sup.1 and R.sup.2 are independently alkyl, aryl, subsituted aryl or benzyl, R.sup.3 is hydrogen or methyl, R.sup.4 and R.sup.5 are independently hydrogen, methyl, methoxy, chloro or nitro, R.sup.7 is hydrogen or methyl, R.sup.8 is hydrogen, alkyl, alkylthiomethyl or alkylene, R.sup.9 is hydrogen or methyl and n is 1 to 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.