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Polymers for use as alignment layers in liquid crystal devices

Patent
Författare Lachezar Komitov
Bertil Helgee
Publiceringsår 2004
Publicerad vid Institutionen för fysik (GU)
Språk en
Uppfinnare (Ecsibeo AB, Swed.).
Patentnummer 2004-SE300 2004113470
Patentets publiceringsdatum 2004-03-04
Ämnesord Polyvinyl acetals Role: POF (Polymer in formulation), TEM (Technical or engineered material use), USES (Uses) (blend with liq. crystal polymer for surface director alignment layers, prepn. of polymers for use as alignment layers in liq. crystal devices), Polymer blends Role: TEM (Technical or engineered material use), USES (Uses) (polyacetal and liq. crystal polymer blends, prepn. of polymers for use as alignment layers in liq. crystal devices), Liquid crystal displays (prepn. of polymers for use as alignment layers in liq. crystal devices), Liquid crystals (side-chain, prepn. of polymers for use as alignment layers in liq. crystal devices), polymer alignment layer liq crystal device, diethoxyundecyloxybiphenylcarbonitrile octanal modified polyvinyl alc prepn
Ämneskategorier Materialfysik med ytfysik

Sammanfattning

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==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.

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