Light-polarizing films or foils containing triphendioxazine or triphendithiazine dyes with good dichrditic properties

US5213582A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Peter Wild · Odenthal, DE
• Uwe Claussen · Leverkusen, DE
• Friedrich W. Krock · Odenthal, DE

Key dates

• Filing date: Mar 11, 1992
• Grant date: May 25, 1993
• Expiry date: Mar 11, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B5/3033
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Light-polarizing films or foils, preferably based on a vinyl alcohol homopolymer or copolymer, contain dyes corresponding to the following formula ##STR1## in which R, R.sup.1, T.sup.1, T.sup.2, n, X and Z are as defined in the specification.