Polyamic acid composition, liquid crystal aligning film, and liquid crystal display element
US6620339B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2000 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | Jun 19, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/1042
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a polyimide alignment film having excellent electrical properties and excellent reliability for use in the field of electronic materials which comprises a polyimide resin produced from a polyamic acid composition comprising a polyamic acid forming a polyimide resin of a low residual voltage and a high voltage holding ratio, and a polyamic acid forming a polyimide resin of a large pre-tilt angle, blended them in the ratio of the former to the latter of 50/50 to 95/5 (weight ratio), a polyamic acid composition for providing such a polyimide aligning film and a liquid crystal display element produced from such an aligning film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.