Electro-optical devices using liquid crystal polymers
US4904066A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1987 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | Jun 22, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/408
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Liquid crystal polymers of general formula ##STR1## wherein the ratio b : a is less than 3 and greater than O, X is a mesogenic group of formula ##STR2## where A and B are cyclic groups, preferably phenyl, which may carry lateral substituents, preferably methyl, R may be F, CH.sub.3, CN, R.sup.1 , OR.sup.1 or COOR.sup.1 where R.sup.1 is alkyl, Y is COO.sub.1 OOC, CH.sub.2 CH.sub.2, c is 0 or 1. A preferred group X is ##STR3## The polymers may be used for optical information storage either alone or in mixture with other liquid crystals for example with smectic materials of formula ##STR4## where R" is alkyl or alkoxy and r is 0 or 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.