Liquid crystal material, liquid crystal composition and...

C - Chemistry – Metallurgy – 07 – C

Patent

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Details

C07C 69/76 (2006.01) C07C 69/92 (2006.01) C07C 69/96 (2006.01) C07C 255/14 (2006.01) C07C 323/12 (2006.01) C07D 239/28 (2006.01) C09K 19/02 (2006.01) C09K 19/06 (2006.01) C09K 19/32 (2006.01) C09K 19/34 (2006.01) C09K 19/58 (2006.01)

Patent

CA 2119828

Disclosed is a liquid crystal material represented by the following formula [I]: R-X-A1-Y1-A2-(Y2-A3)n-z-R* [I] wherein R is an alkyl or polyfluoroalkyl group; X is a group such as -COO-, or a single bond; n is 0 or 1; A1, A2 and A3 are each a cyclic group such as tetralin, and at least one of them has an optically active group; Y1 and Y2 are each a group such as -COO-; Z is a group such as -O-, or a single bond; and R* is an optically active group. Also disclosed are a liquid crystal composition comprising the liquid crystal material represented by the above formula, and a liquid crystal element in which the liquid crystal material is used. The liquid crystal material of the invention shows excellent liquid crystal characteristics because it has at least two optically active groups.

Produit de cristal liquide représenté par la formule suivante :[I]: R-X-A1-Y1-A2-(Y2-A3)n-z-R* [I], où R est un groupe alkyle ou polyfluoroalkyle; X est un groupe comme -COO- ou une liaison simple; n est égal à 0 ou à 1; chacun des groupes A1, A2 et A3 est un groupe cyclique comme la tétraline, et au moins l'un d'eux est porte un groupe optiquement actif; chacun des groupes Y1 et Y2 est groupe de type comme -COO-; Z est un groupe comme -O- ou une liaison simple; et R* est un groupe optiquement actif. L'invention porte aussi sur une composition de cristal liquide comportant le produit de cristal liquide représenté par la formule ci-dessus, et sur un élément de cristal liquide dans lequel on utilise ce produit. Ce produit de cristal liquide présente d'excellentes caractéristiques de cristal liquide parce qu'il comporte au moins deux groupes optiquement actifs.

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