N-substituted tetrahydroquinolines for use as antioxidants in lubricants
US4929732A · kind A · utility
6Cited by
14References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1989 |
| Grant date | May 29, 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
Compounds useful as additives for lubricants, hydraulic oils and metal-working fluids include those of formula IV ##STR1## where R.sup.1 and R.sup.2 are independently alkyl or substituted aryl, R.sup.3 and R.sup.13 are independently hydrogen or methyl, R.sup.6 is alkyl, alkenyl, aralkyl or substituted benzyl, and R.sup.15 and R.sup.16 are independently hydrogen, alkyl, aryl or aralkyl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.