Reactive liquid crystal compounds
US5622648A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1994 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Oct 14, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2019/0448
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed are liquid crystal compounds of formula I EQU R.sup.1 --P--X--(A.sup.1 --Z.sup.1).sub.n --A.sup.2 --R.sup.2 I wherein PA1 R is ##STR1## W is H, Cl or C.sub.1-5 -alkyl, and m is 1-7, PA1 P is C.sub.1-12 alkylene, one or more CH.sub.2 groups optionally being replaced by O, PA1 X is --O--, --S--, --COO--, --OCO-- or a single bond, PA1 R.sup.2 is C.sub.1-15 -alkyl optionally substituted by halogen, one or more CH.sub.2 groups optionally replaced by --O--, --S--, --CO--, --O--CO--, --CO--O-- or --O--CO--O--; R.sup.1 --P--X, CN, F, Cl or --V--Q--T, PA1 V is --O--, --S-- or a single bond, PA1 Q is --CH.sub.2 --, --CHF--, --CF.sub.2 --, PA1 T is F or Cl, PA1 n is 1 or 2, PA1 A.sup.1, A.sup.2 are 1,4-phenylene optionally substituted by F, Cl, CN or --W--C.sub.r H.sub.s F.sub.2r+1-s, or one of A.sup.1 or A.sup.2 is ##STR2## pyrimidine-2,5-diyl or pyrimidine-2,5 diyl, Z.sup.1 is --CO--O--, --O--CO--, --CH.sub.2 CH.sub.2 -- or a single bond, PA1 r is 1 or 2, PA1 s is O, 1, 2, 3, 4, or 5, PA1 W is a single bond, --O--, --S-- or --CO--, PA1 with the provisos (i) that at least one of A.sup.1 and A.sup.2 is a 1,4-phenylene group which is mono-or polysubstituted by Cl, CN or --W--C.sub.r …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.