Method for preparing three types of benzidine compounds in a specific ratio
US7183437B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Oct 9, 2003 |
| Grant date | Feb 27, 2007 |
| Priority date | — |
| Expiry date | Apr 17, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C209/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for preparing three types of benzidine compounds in a specific ratio, the method uses two types of diphenylamine compounds and one type of biphenyldihalide compound in a specific ratio as reactants to mix with an organic solvent and an additive to synthesize benzidine compounds in one step. The synthesized three types of benzidine compounds specially perform in a designated mixturing ratio having excellent photoelectric characteristics for a charge transporting layer in an organic photo-conductive drum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.