Production of siloxane-containing block copolycarbonates by means of compatibilizers

US11161938B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Alexander Meyer · Mülheim an der Ruhr, DE
• Klaus Horn · Dortmund, DE
• John Huggins · Enfield, US

Key dates

• Filing date: Dec 19, 2017
• Grant date: Nov 2, 2021
• Expiry date: Feb 19, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/16
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The subject of the present invention is a process for the production of polysiloxane-polycarbonate block cocondensates, wherein A) at least one polycarbonate is reacted in the melt with B) at least one hydroxyaryl-terminated polysiloxane with use C) of an additive which is selected from at least one from the group consisting of a siloxane containing aromatic substituents (component C1) and a polysiloxane-polycarbonate block cocondensate A) or polysiloxane-polycarbonate block cocondensate, which can also be different from A) (component C2).