Liquid crystal copolymer

Abstract

Abstract PURPOSE:To provide a polymer containing a specific recurring unit, exhibiting ferroelectric chiral smectic C phase over a wide temperature range including room temperature, having quick response to external factor, capable of displaying moving picture and useful as a display element having large or curved picture frame. CONSTITUTION:The objective liquid crystal copolymer is composed of two or more kinds of recurring units of formula I {k is 1-30; R<1> is group of formula II or III [X is -COO-, -OCO- or -CH=N-; R<2> is -COOR<3> (R<3> is 1-10C alkyl, 1-10C fluoroalkyl, etc. having 0 or >=1 asymmetric C atoms), -OCOR<3>, -OR<3> or -R<3>], etc.} wherein one or more kinds of the recurring units in the above units are units of formula IV {R<4> is group of formula V, VI [R<5> is -COOR<6> (R<6> is R<3>), -OCOR<6>, -OR<6> or -R<6>], etc.}. The polymer can be produced e.g. by copolymerizing two or more kinds of acrylate liquid crystal monomers of formula VII.

Inventors

• 👤 Toshiharu Uchida
• 👤 Kazuharu Morita
• 👤 Kenji Hashimoto

Bibliographic Details