Nitrogenous additives with an antioxidant action and lubricating compositions containing the said additives
US5269954A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1991 |
| Grant date | Dec 14, 1993 |
| Priority date | — |
| Expiry date | Nov 25, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B1/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to the preparation of antioxidant additives to lubricants and to their use in lubricating compositions. The additives according to the invention have the formula: EQU ArAr'(H)N--(R--X).sub.a --R'Y where--Ar and Ar' are identical or different aromatic radicals, R and R', which are identical or different, denote a C.sub.2 -C.sub.18 linear or branched alkylene radical, X denotes an oxygen or sulphur atom or an --NH group, a is an integer between 0 and 5 and Y is chosen from the group consisting of --NR.sub.1 R.sub.2, where R.sub.1 and R.sub.2, which are identical or different, denote a hydrogen atom or a C.sub.1 -C.sub.12 alkyl, alkenyl, cycloalkyl or arylalkyl radical --N.dbd.CH--Ar.sub.1 where Ar.sub.1 is an aryl radical containing at least one phenolic group --NR.sub.1 --CO--Ar.sub.1 and ##STR1## where R.sub.3 denotes a saturated or unsaturated, linear or branched alkyl radical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.