Polymers containing mesogenic groups and dye radicals in the side chains

US4631328A · kind A · utility

Assignee

• BASF SE

Inventors

• Helmut Ringsdorf · Mainz, DE
• Michael Portugall · Monsheim, DE
• Hans-Werner Schmidt · Bayreuth, DE
• Karl-Heinz Etzbach · Bischofswerda, DE

Key dates

• Filing date: Dec 26, 1984
• Grant date: Dec 23, 1986
• Expiry date: Dec 26, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/3833
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The polymer chain comprises PA0 (a) one or more monomers possessing a nematogenic, chiral or smectogenic group, or a mixture of monomers possessing a nematogenic group with those possessing a chiral group, and PA0 (b) one or more monomers possessing a radical of a pleochroic dye, and the nematogenic, the chiral and the smectogenic groups are bonded to the polymerizable group either directly or, like the dye radicals, via a spacer. The polymers can be used, together with low molecular weight liquid crystals or liquid crystal mixtures, in electrooptical displays.