Block copolymers for optical data storage

US7018684B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Horst Berneth · Leverkusen, DE
• Thomas Bieringer · Odenthal, DE
• Rainer Hagen · Leverkusen, DE
• Serguei Kostromine · Rheinbach, DE
• Hans-Werner Schmidt · Bayreuth, DE
• Axel Muller · Wiesbaden, DE
• Stephan Zilker · Eindhoven, NL
• Carsten Frenz · Attendorn, DE
• Thomas Breiner · Hemsbach, DE

Key dates

• Filing date: May 18, 2001
• Grant date: Mar 28, 2006
• Expiry date: Sep 30, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2323/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Block polymers suitable for the preparation of data storage media are disclosed. The media produced of the inventive of the polymers has thickness in the range of a few millimeters. In contrast with currently available materials that feature high optical density the inventive polymers feature increased dilution of dyes (decrease in optical density) and decrease in the holographic diffraction efficiency.