Photo cross-linkable liquid crystal derivatives
US5800733A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1996 |
| Grant date | Sep 1, 1998 |
| Priority date | — |
| Expiry date | Jul 25, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2019/0448
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention is concerned with photo cross-linkable liquid crystalline compounds in the formula ##STR1## wherein for example: A,B,C,D,E,F independently is pyridine-2,5-diyl, pyrimidine-2,5-diyl, trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl PA1 Z.sup.1, Z.sup.2, Z.sup.7 independently is --(CH.sub.2).sub.s O--, --COO--, --(CH.sub.2).sub.s COO-- PA1 Z.sup.3, Z.sup.4, Z.sup.8 independently is a single bond, --CH.sub.2 CH.sub.2 --, --CH.sub.2 O-- PA1 Z.sup.5, Z.sup.6 independently is --(CH.sub.2).sub.s -- PA1 m, n, q and r independently is 0, 1 or 2; PA1 s is a whole number of 1 to 16; PA1 R.sup.1, R.sup.2 independently is CH.sub.2 .dbd.CH--COO--, CH.sub.2 .dbd.C(CH.sub.3)--COO-- PA1 R.sup.3 is H, CH, COOC.sub.n H.sub.2n+1, CnH.sub.2n+1 ; n=1 . . . 10 PA1 X.sup.1, X.sup.2 and X.sup.3 independently is hydrogen, halogen, cyano or lower alkyl. The invention is also related to liquid crystalline mixtures and their use for electro-optical purpose.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.