Process for the production of 4, 4'-(phenylene-diisopropyl)-bis(2, 6-dialkylanilines)
US5488163A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1994 |
| Grant date | Jan 30, 1996 |
| Priority date | — |
| Expiry date | Dec 20, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/18
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the production of 4,4'-(phenylenediisopropyl)bis(2,6-dialkylanilines) of the general formula: ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and each is a (C.sub.1 -C.sub.4)alkyl group, R.sub.3 is hydrogen or halogen, and the central phenylene function is substituted in the 1,3 or 1,4 position, by reaction of a corresponding diisopropyl benzene with a corresponding aniline in the presence of catalytic amounts of aluminum chloride. The 4,4'-(phenylenediisopropyl)-bis(2,6-dialkylanilines) are used as cross-linking agents for epoxy resins, as chain lengthening agents for polyurethanes, for the production of hydrolysis protective agents for polyurethanes, or for the production of UV stabilizers in varnishes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.