Coumarin and quinolinone derivatives for the production of orienting layers for liquid crystals

US6201087A · kind A · utility

Assignee

• ROLIC AG · CH

Inventors

• Rolf-Peter Herr · Glückstadt, DE
• François Herzog · Richwiller, FR
• Andreas Schuster · Annaberg-Buchholz, DE

Key dates

• Filing date: Mar 27, 1997
• Grant date: Mar 13, 2001
• Expiry date: Mar 27, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F1/133788
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A polymer having the formula ##STR1## wherein M.sup.1 and M.sup.2 signify monomer units for homo- or copolymers. "x" and "y" indicate the mole fractions of the comonomers, with in each case 0<x.ltoreq.1 and 0.ltoreq.y<1 and x+y=1. The symbol "p" signifies 4 to 30,000 and "S.sup.1 " and "S.sup.2 " signify spacer units. "Q.sup.1 " signifies a structural unit of the formula --A--(Z.sup.1 --B).sub.z --Z.sup.2 -- and "Q.sup.2 " signifies a structural unit of the formula --A--(Z.sup.1 --B).sub.z R.sup.1. "A" and "B" each independently signify pyridine-2,5-diyl, pyrimidine-2,5-diyl, 1,4--Cyclohexylene,1,3-dioxane-2,5-diyl or optionally substituted 1,4-phenylene. "Z" and "Z.sup.2 " each independently signify a single covalent bond selected from the group consisting of --CH.sub.2 -ch.sub.2 --, --CH.sub.2 O--, --OCH.sub.2 --, --CONR--, --RNCO--, --COO-- or --OOC--. "R" signifies either a hydrogen or lower alkyl, where "R.sup.1 " signifies hydrogen, optionally substituted alkyl or alkoxy, each having 1 to 12 carbon atoms, cyano, nitro or halogens. "z" is either 0 or 1 and "C" is either a photochemically dimerizable coumarin or quinoline derivative. Finally, "m" and "n" are each independently …