Acrylic resins of low hygroscopicity

US4709000A · 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: Aug 8, 1986
• Grant date: Nov 24, 1987
• Expiry date: Aug 8, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F220/14
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Copolymers exhibiting low water absorption and having good optical and mechanical properties, suitable for use in making data storage disks containing optically readable information, said copolymer being at least ternary and comprising PA0 (A) methyl methacrylate, and further comonomers selected from at least two of the groups PA0 (B) ##STR1## where R' is hydrogen or methyl and R" is hydrogen or alkyl, and (C) ##STR2## where R'" is aliphatic or alicyclic hydrocarbon, and (D) styrene and/or alpha-methyl styrene.