Light-polarizing films or sheets containing stilbene dyestuffs

US5007942A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

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

Key dates

• Filing date: Dec 14, 1989
• Grant date: Apr 16, 1991
• Expiry date: Dec 14, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B56/04
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Light-polarizing films or sheets, preferably based on vinyl alcohol homopolymers or copolymers contain dyestuffs of the formula ##STR1## in which X and Y have the meanings given in the description.