Diaryl amine antioxidants prepared from branched olefins
US10487043B2 · kind B2 · utility
4Cited by
5References
7Claims
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Key dates
| Filing date | Jun 22, 2016 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | May 5, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2030/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Diaryl amines are selectively alkylated by reaction with branched olefins, which olefins are capable of forming tertiary carbonium ions and can be conveniently prepared from readily available branched alcohols. The diaryl amine products are effective antioxidants and often comprise a high amount of di-alkylated diaryl amines and a low amount of tri- and tetra-alkylated diaryl amines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.