Diamine compound containing triazine group, polyamic acid synthesized from the diamine compound and LC alignment film prepared from the polyamic acid
US7635746B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Jan 20, 2004 |
| Grant date | Dec 22, 2009 |
| Priority date | — |
| Expiry date | Jan 20, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31721
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Diamine compound containing specific triazine group, polyamic acid obtained by reacting the diamine compound and tetracarboxylic dianhydride, and liquid crystal alignment film obtained by coating and imidizing the polyamic acid. The liquid crystal alignment film has good heat-resistance, high transparency in visible light region and improved voltage holding ratio. Also, pretilt angle is easily controlled over broad range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.