Maleimide copolymer as alignment layer for liquid-crystal displays

US5644016A · kind A · utility

Inventors

• Horst Roschert · Ober-Hilbersheim, DE
• Norbert Rosch · Frankfurt am Main, DE
• Peter Wegener · Königstein, DE

Key dates

• Filing date: Nov 17, 1994
• Grant date: Jul 1, 1997
• Expiry date: Nov 17, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31721
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Use of a polymer containing maleimide units of the formula I ##STR1## in which R.sup.1 is hydrogen, an acyclic or cyclic, aliphatic, aromatic or araliphatic radical which is chiral or achiral, can be monosubstituted or polysubstituted by functional groups and in which one or more CH.sub.2 groups can be replaced by functional groups, as alignment layer in liquid-crystal displays. Alignment layers containing a polymer conforming to the formula I effect, in particular, a suppression of twist states and ghost images and thus an improvement in the optical contrast.