N-substituted tetrahydroquinolines for use as antioxidants in lubricants
US4919832A · kind A · utility
4Cited by
6References
3Claims
0Family size
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Key dates
| Filing date | Feb 2, 1989 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | Feb 2, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Composition containing PA1 (a) at least one lubricant, hydraulic oil or metal-working fluid based on mineral oil or synthetic oils and PA1 (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 V ##STR1## where R.sup.1 and R.sup.2 are independently alkyl, aryl, substituted 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.13 is hydrogen or methyl, and R.sup.17 is a direct bond, alkylene or vinylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.