Copolycarbonates having improved flowability

US7425358B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Helmut-Werner Heuer · Krefeld, DE
• Rolf Wehrmann · Krefeld, DE
• Michael Erkelenz · Duisburg, DE
• Alexander Meyer · Mülheim an der Ruhr, DE
• Melanie Mothrath · Mülheim an der Ruhr, DE

Key dates

• Filing date: Apr 28, 2005
• Grant date: Sep 16, 2008
• Expiry date: Dec 22, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G64/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An optical data storage comprising a thermoplastic copolycarbonate is disclosed. The copolycarbonate contains at least one unit derived from dihydroxydiphenyl ether and at least one unit derived from at least one member selected from the group consisting of 4,4′dihydroxybiphenyl and 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane.