Storage disk made of para-methyl styrene

US4636458A · kind A · utility

Assignee

• Rohm Co., Ltd. · JP

Inventors

• Franz Wenzel · Darmstadt, DE
• Peter J. Arndt · Seeheim-Jugenheim, DE
• Werner Siol · Pfungstadt, DE

Key dates

• Filing date: Dec 2, 1985
• Grant date: Jan 13, 1987
• Expiry date: Dec 2, 2005

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/146
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Homopolymers of para-methylstyrene and copolymers thereof with monomers such as methyl methacrylate, which polymers exhibit very low water absorption in combination with good optical and mechanical properties and are useful for making optically readable data storage disks.