Transparent materials consisting of hydrogenated products of ring-opened metathetical polymers with polar substituents

US5990246A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

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

Key dates

• Filing date: Dec 16, 1997
• Grant date: Nov 23, 1999
• Expiry date: Dec 16, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G61/08
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Hydrogenation products of copolymers prepared by ring-opening metathetical polymerisation of a cyano-substituted norbornene and at least one multicyclic olefin, which contains 95.5 to 5 wt. % of the cyano-substituted norbornene incorporated in the polymer and in which at least 60% of the initially present olefinic double bonds have been saturated by hydrogenation and the preparation of the new hydrogenation products by polymerisation in the presence of a catalyst and optionally a chain transfer agent at -20.degree. C. to 100.degree. C. at atmospheric pressure in an inert solvent, followed by hydrogenation in the presence of a homogeneous or heterogeneous hydrogenation catalyst at 0.degree. C. to 200.degree. C. under a hydrogen pressure of 2 to 200 bar in an inert solvent.