Amorphous vinyl cyclohexane polymers

US6365694B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Volker Wege · Neuss, DE
• Ralf Dujardin · Willich, DE
• Yun Chen · Krefeld, DE
• Johann Rechner · Krefeld, DE
• Friedrich-Karl Bruder · Krefeld, DE

Key dates

• Filing date: Aug 8, 2000
• Grant date: Apr 2, 2002
• Expiry date: Aug 8, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F8/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Amorphous polymers, including homopolymers and co-polymers, containing residues of vinyl cyclohexane and/or substituted vinyl cyclohexane are described. The polymers of the present invention have a syndiotactic configuration in which the quantity of diads is greater than 50.1% and less than 74%. The polymers of the invention have high transparency, low birefringence and high heat defection temperature, and can be used to prepare molded articles (e.g., optical data storage media and lenses) and films.