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Laterally substituted curable liquid crystals

Imported: 24 Feb '17 | Published: 13 Jan '04

Richard Buchecker, Teodor Lukac, Carsten Benecke

USPTO - Utility Patents

Abstract

In one embodiment, the invention relates to compounds of the formula (I)

wherein G1 and G2 independently represent a polymerizable mesogenic residue, and X, Sp, and Q are as defined herein. The compounds of the invention may, for example, be useful as curable liquid crystals and for preparing liquid crystal films.

Claims

1. A compound of formula (I)

wherein

2. A compound according to claim 1, in which G

1 and G

2 are the same.

3. A compound according to claim 1 in which X is —CH

2—, —O—, —COO— or —OOC—.

4. A compound according to claim 1 wherein said p ranges from 1 to 11.

5. A compound according claim 1 wherein no more than one —CH

2— moiety of the Sp group is replaced by —CH═CH—, —O—, CO—, —COO—, —OOC—, —CONR′—, —OCOO—, OCONR′.

6. A compound according claim 1 wherein Q is —CN, —COOR, —OCOR, Cl, —CF

3, —OCF

3, —OR or a cyclic group.

7. A compound according claim 1 wherein said cyclic group is selected from the group consisting of five or six membered saturated isocyclic moieties, five or six membered saturated heterocyclic moieties, five or six membered unsaturated isocyclic moieties and five or six membered unsaturated heterocyclic moieties.

8. A compound according claim 1 wherein said cyclic group is optionally substituted by a group selected from the group consisting of a lower alkyl, lower alkoxy, F, Cl, —CN, —COOR″, —OCOR″, —OCF

3, and OR″, in which R″ is a lower alkyl.

9. A compound according claim 1 wherein said mesogenic residues G

1 and G

2 are of formula II

wherein

10. A compound according to claim 9, in which Z

1 and Z

2 are each independently a single bond, —COO—, —OOC—, —CH

2—CH

2, —CH

2O, —OCH

2—, —CH═CH— or —C≡C—.

11. A compound according to claim 9 in which R

1 is CH

2═CW—, CH

2═CW—COO— or CH

2═CH—O—.

12. An optical or electro-optical device comprising a compound according claim 1.

13. A LCP network comprising a compound according to claim 1.

14. A LCP mixture comprising a compound of formula (I)

wherein

and one or more additional suitable components.

15. An optical or electro-optical device comprising a mixture according to claim 14 in cross-linked or polymerized form.

16. A LCP network comprising a mixture according to claim 14 in cross-linked or polymerized form.