Diamine compound having dendron side chain and liquid crystal aligning agent using same
US7790836B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2009 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | Nov 23, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed herein is a novel functional diamine compound having a dendron structure, polyamic acid which is produced using functional diamine, aromatic cyclic diamine, aliphatic cyclic acid dianhydride, and aromatic cyclic acid dianhydride, polyimide which is produced by imidizing polyamic acid, and an LC alignment film produced using polyimide. Even if the diamine compound is used in a small amount, it is possible to realize a high pretilt angle, thus the pretilt angle is easily controlled. Therefore, it can be used to produce an LC alignment film using a twisted nematic (TN) mode, in which the pretilt angle of liquid crystal is low, and a vertically aligned (VA) mode, which requires a high pretilt angle of about 90°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.