Polymers for use as alignment layers in liquid crystal devices
Patent, 2004

The invention relates to a polymer for use as a surface-director alignment layer in a liq. crystal device, said polymer comprising a polymeric backbone and side-chains attached thereto, wherein the polymeric backbone lacks directly coupled ring structures, and each side-chain of at least some of the side-chains comprises >=2 unsubstituted and/or substituted phenyls coupled via a coupling selected from a carbon-carbon single bond, a carbon-carbon double bond contg. unit (CH:CH), a carbon-carbon triple bond contg. unit (C.tplbond.C), a methylene eter unit (CH2O) , an ethylene eter unit (CH2CH2O), an ester unit (COO) and an azo unit (N:N), exhibits a permanent and/or induced dipole moment that in ordered phase provides dielec. anisotropy, and is attached to the polymeric backbone via at least two spacing atoms. Thus, 4'-(11,11-diethoxyundecyloxy)biphenyl-4-carbonitrile 0.70, octanal 0.081, and polyvinyl alc. 0.198 g were reacted in DMF at 55 Deg for 24 h to give a side-chain liq. crystal polymer, which was fabricated into a liq. crystal device as alignment layer. [on SciFinder (R)]

diethoxyundecyloxybiphenylcarbonitrile octanal modified polyvinyl alc prepn

polymer alignment layer liq crystal device

Inventor

Lachezar Komitov

Bertil Helgee

Chalmers, Department of Materials and Surface Chemistry, Polymer Technology

(Ecsibeo AB, Swed.).

2004113470

PCT/SE2004000300

Subject Categories

Atom and Molecular Physics and Optics

Other Materials Engineering

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Latest update

10/15/2018