Patent ID: 6051290
Filing Date: 2000-04-18
Classification: C07D,C09K,G02B,G02F

Abstract:
An optical retardation plate comprising a layer of a composition on a substrate, wherein the layer comprises the following composition: ##STR7## wherein R.sup.1, which may be the same or different, is a hydrophilic group selected from the group consisting of carboxylic, sulfonic, sulfonamide and phosphate groups;R.sup.2, which may be the same or different, is selected from the group consisting of alkyl groups and hydrogen;R.sup.3 is selected from the group consisting of:(a) unsubstituted, positively charged heteroaromatic rings linked to the triazine backbone through a nitrogen atom in the R.sup.3 ring, with the proviso that R.sup.3 is not a pyridine ring, with X.sup.- as a counterion selected from the group consisting of Cl.sup.-, OH.sup.-, SO.sub.4 H.sup.-, CH.sub.3 COO.sup.-, and CF.sub.3 COO.sup.-, BF.sub.4.sup.-, PF.sub.6.sup.-, SbF.sub.6.sup.-, CH.sub.3 SO.sub.3.sup.-, CF.sub.3 SO.sub.3.sup.-, and PhCO.sub.2.sup.- --;(b) substituted, positively charged heteroaromatic rings linked to the triazine backbone through a nitrogen atom in the R.sup.3 ring, wherein the substituents for R.sup.3 are selected from the group consisting of alkyl, carboxyl, amino, alkoxy, thio, cyano, amide and ester groups, with X.sup.- as a counterion selected from the group consisting of Cl.sup.-, OH.sup.-, SO.sub.4 H.sup.-, CH.sub.3 COO.sup.-, and CF.sub.3 COO.sup.-, BF.sub.4.sup.-, PF.sub.6.sup.-, SbF.sub.6.sup.-, CH.sub.3 SO.sub.3.sup.-, CF.sub.3 SO.sub.3.sup.-, and PhCO.sub.2.sup.- ; and(c) unsubstituted, positively charged pyridine rings linked to the triazine backbone through the nitrogen atom in the R.sup.3 ring, with X.sup.31 as a counterion selected from the group consisting of SO.sub.4 H.sup.-, CH.sub.3 COO.sup.-, and CF.sub.3 COO.sup.-, BF.sub.4.sup.-, PF.sub.6.sup.-, SbF.sub.6.sup.-, CH.sub.3 SO.sub.3.sup.-, CF.sub.3 SO.sub.3.sup.-, and PhCO.sub.2.sup.-.