Liquid crystalline copolymer
US6013197A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1997 |
| Grant date | Jan 11, 2000 |
| Priority date | — |
| Expiry date | Dec 8, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2019/3095
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to copolymers made from mono-reactive liquid and/or di-reactive liquid crystals which can be photopolymerized to form copolymers and to novel reactive liquid crystal compound having a nematic phase. Preferentially the reactive liquid crystal is polymerized while in the liquid crystal phase to produce an oriented birefringent polymer film. To do this, the reactive liquid crystal, in its nematic or smectic phase is aligned (by well known techniques such as rubbed polyimide, etc.) and the thin film containing a small amount of photoinitiator, is subjected to ultraviolet light whereupon it polymerizes into a thin, aligned polymer film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.