Alignment layer material for liquid crystal display devices
AssigneeHoechst Aktiengesellschaft
InventorsTakamasa Harada, Haruhiko Itoh, Masami Ubukata, Fumie Nozawa
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Abstract
The object of the present invention is to provide an alignment layer material for forming a liquid crystal alignment layer having an excellent adhesion to a glass substrate, having less dependency of display characteristics on the viewing angle with a high contrast. (Constitution) A composition used for an alignment layer material comprising a mixture of a polymer (A) which is a block copolymer containing a siloxane compound as a constituting component, and a homopolymer or copolymer (B) having the following repeating unit (1): ##STR1## is disclosed.
Claims19
An alignment layer material of a liquid crystal display device having a liquid crystal layer between a pair of substrates wherein a transparent electrode and the alignment layer are formed in this order on the inside thereof, wherein the alignment layer comprises a mixture of a polymer (A) which is a block copolymer comprising a siloxane compound as a constituting component, and a homopolymer or copolymer (B) comprising the following repeating unit (1):
- ##STR5## wherein X represents --H, --F, --CH.sub.3, --CF.sub.3, --CN or --CH.sub.2 --CH.sub.3 ;
- Z represents a single bond, --O--, --(C.dbd.O)--, --(C.dbd.O)--O--, --O--(C.dbd.O)--, or --O--(C.dbd.O)--(CH.sub.2).sub.n --(C.dbd.O)--O-- (wherein n is an integer of from 0 to 20);
- and
- R.sup.1 represents a hydrogen atom, a straight chain or a branched alkyl group, a straight chain or branched unsaturated aliphatic hydrocarbon group, a cycloalkyl group, an aryl group, a saturated or unsaturated hetero ring or an aryl group or hetero ring which is substituted with 1, 2 or 3 groups --X, --R.sup.1 or Z--R.sup.1.
Dependencies are inferred from the claim text.