Materials for inducing alignment of liquid crystals and liquid crystal optical elements
US5958292A · kind A · utility
10Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 1998 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | May 18, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133788
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyamic acid derived from an amine component comprising a 2-cyano-1,4-phenylene diamine and a family of diaryl ketones is claimed. The polyamic acids are useful in formation of polyimides, also claimed, and for the optical alignment of liquid crystals and the manufacture of liquid crystal optical elements, also claimed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.