Organopolysiloxane compositions modified with polyurethane

US4202807A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans-Heinrich Moretto · Cologne, DE
• Armand de Montigny · Leverkusen, DE
• Helmut Steinberger · Leverkusen, DE
• Hans Sattlegger · Odenthal, DE
• Ingrid Larking · Landvetter, SE

Key dates

• Filing date: Jun 21, 1978
• Grant date: May 13, 1980
• Expiry date: Jun 21, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/455
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyurethane is present as a solid phase in a liquid polyorganosiloxane, preferably being formed therein by mixing a polyhydroxy-containing material with the polysiloxane followed by addition of a polyisocyanate. If the polyorganosiloxane contains hydroxyl groups it can be chemically bonded to the polyurethane. The composition can be cured to solid plastic masses of superior properties by adding a curing agent for the polysiloxane.