Alkenylbicyclohexane liquid crystals
AssigneeHoffmann-La Roche Inc.
InventorsRichard Buchecker, Martin Schadt
Life of this patent
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Abstract
Compounds of the formula ##STR1## wherein Z represents a single covalent bond or --CH.sub.2 CH.sub.2 --, R.sup.1 denotes 1E-alkenyl with 2-10 carbon atoms or 3E-alkenyl with 4-10 carbon atoms and R.sup.2 is alkyl with 1-10 carbon atoms, 2E-alkenyl with 3-10 carbon atoms or 3-alkenyl with 4-10 carbon atoms, as well as their use in liquid crystalline mixtures and for electro-optical purposes.
Claims15
A compound of the formula ##STR6## wherein Z is a single covalent bond or --CH.sub.2 CH.sub.2 --, R.sup.1 is 1E-alkenyl with 2-10 carbon atoms or 3E-alkenyl with 4-10 carbon atoms and R.sup.2 is alkyl with 1-10 carbon atoms, 2E-alkenyl with 3-10 carbon atoms or 3-alkenyl with 4-10 carbon atoms.
A liquid crystalline mixture with at least 2 components, wherein at least one of such components is a compound of formula ##STR7## wherein Z is a single covalent bond or --CH.sub.2 CH.sub.2 --, R.sup.1 is 1E-alkenyl with 2-10 carbon atoms or 3E-alkenyl with 4-10 carbon atoms and R.sup.2 is alkyl with 1-10 carbon atoms, 2E-alkenyl with 3-10 carbon atoms or 3-alkenyl with 4-10 carbon atoms.
An electro-optical cell comprising:
- (a) two plate means;
- (b) liquid crystal means disposed between the two plate means and including a compound of the formula:
- ##STR9## wherein Z is a single covalent bond or --CH.sub.2 CH.sub.2 --, R.sup.1 is 1E-alkenyl with 2-10 carbon atoms or 3E-alkenyl with 4-10 carbon atoms and R.sup.2 is alkyl with 1-10 carbon atoms, 2E-alkenyl with 3-10 carbon atoms or 3-alkenyl with 4-10 carbon atoms;
- and
- (c) means for applying an electrical potential to said plate means.
Dependencies are inferred from the claim text.