New polysiloxane block copolymers

US4826946A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Herbert Eichenauer · Dormagen, DE
• Christian Lindner · Bensheim, DE
• Karl-Heinz Ott
• Peter Orth · Neunburg vorm Wald, DE
• Hartwig Hocker · Eckersdorf, DE

Key dates

• Filing date: Jun 4, 1987
• Grant date: May 2, 1989
• Expiry date: Jun 4, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/46
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Multi-block copolymers of recurring structural units of polysiloxanes and recurring structural units of aliphatic polyesters, polyethers or polyetheresters with rubber properties, the individual polymeric blocks constituting rubber-type products with glass transition temperatures below practical usefulness and a process for their production.