US 7,070,711 B2Granted

Polymerizable liquid crystalline composition and liquid crystal film produced from the same

AssigneeNippon Oil Co., Ltd.

InventorsTakashi Seki, Takuya Matsumoto, Toru Nakamura, Hitoshi Mazaki

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Abstract

Liquid crystalline compositions contain no functional group the synthesis of which is difficult, such as (meth)acrylate and epoxy group and comprise (A) an oxetane compound having an optically active portion, (B) a side chain liquid crystalline polymeric substance having an oxetanyl group, and (C) a photo cation generator and/or a thermal cation generator. The use of the composition can provide a cholesteric-aligned liquid crystal film with excellent alignment retention properties after being fixed in the liquid crystal state and mechanical strength, without employing any complicated step such as photo irradiation under an inert gas atmosphere.

Claims6

Dependent claims

A polymerizable liquid crystalline composition comprising (A) an oxetane compound having an optically active portion represented by formula (1) below, (B) a side chain liquid crystalline polymeric substance having an oxetanyl group, and (C) a photo cation generator and/or a thermal cation generator, the weight ratio of Compound (A) to Compound (B) being within the range of 0.01:99.99 to 60:40:

Z1-(CH2)n-L1-P1-L2-C1-L2-P1-L1-(CH2)n-Z1 (1)
wherein Z1 is a group represented by formula (2), (3) or (4) below, L1 and L2 are each independently a single bond, —O—, —O—CO—, or —CO—O—, P1 is a group represented by formula (5) or (6) below, C1 is an optically active site, and n is an integer of 0 to 8;
wherein X is selected from the group consisting of hydrogen, methyl, and halogen.

Dependencies are inferred from the claim text.

Facts

Application: 10/965,180Filed 14 Oct 2004
Priority: JP 2003-35549815 Oct 2003
Published: US 2005/0082513 A121 Apr 2005
Granted: 4 Jul 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

C09K 19/3852
Polyvinyl derivatives: polyacrylate derivatives
C09K 2019/323
Compounds containing a naphthalene ring or a completely or partially hydrogenated naphthalene ring: containing a binaphthyl
C09K 2019/3408
The heterocyclic ring being a five-membered ring: five-membered ring with oxygen in fused, bridged or spiro ring systems
C09K 2019/3416
Having oxygen as hetero atom: the heterocyclic ring being a four-membered ring, e.g. oxetane