Mixtures of alkylated aromatic amines and phenothiazines
US5503759A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1994 |
| Grant date | Apr 2, 1996 |
| Priority date | — |
| Expiry date | Dec 20, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D279/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to reaction products suitable as antioxidants which are substantially liquid at room temperature and which are obtained by the reaction of olefins with mixtures of diphenylamines and phenothiazines which may be alkylated. These products are obtainable by reacting an olefin of formula EQU R.sub.1 R.sub.2 C.dbd.CHR.sub.3 (I) with a mixture of compounds of formulae II and III ##STR1## in the presence of an acid catalyst, wherein R.sub.1 is hydrogen, C.sub.1 -C.sub.25 alkyl or phenyl, PA1 R.sub.2 is C.sub.1 -C.sub.25 alkyl, benzyl or phenyl, PA1 R.sub.3 is hydrogen or C.sub.1 -C.sub.12 alkyl, PA1 R.sub.4, R*.sub.4, R.sub.5 and R*.sub.5 are each independently of one another hydrogen, C.sub.1 -C.sub.25 alkyl, C.sub.5 -C.sub.12 cycloalkyl, benzyl, .alpha.-methylbenzyl or .alpha.,.alpha.-dimethylbenzyl, and R.sub.6 and R*.sub.6 are each independently of the other hydrogen, C.sub.1 -C.sub.18 alkyl, C.sub.1 -C.sub.4 alkenyl, benzyl or a radical of formula --CH(R.sub.9)--CH(R.sub.10)--S--R.sub.11, and PA1 R.sub.7 and R.sub.8 are hydrogen, or together form a divalent group ##STR2## R.sub.9 and R.sub.10 are each independently of the other hydrogen, phenyl or C.sub.1 -C.sub…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.