Thermoplastic polysiloxane-polyester (carbonate) block copolymers, their preparation and use

US4681922A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Manfred Schmidt · Krefeld, DE
• Winfried Paul · Krefeld, DE
• Dieter Freitag · Krefeld, DE
• Dietrich Rathmann · Leverkusen, DE

Key dates

• Filing date: Nov 29, 1984
• Grant date: Jul 21, 1987
• Expiry date: Nov 29, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/448
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Siloxane/polyester (carbonate) block copolymers comprising wholly aromatic polyester or polyestercarbonate units and from 0.5 to 7.5% by weight of polysiloxane blocks, exhibit an improved melt flowability without impairment of the heat stability.