Patent · US Active

Siloxane-containing block copolycarbonates having a small domain size

US11970615B2 · kind B2 · utility

0Cited by

18References

15Claims

0Family size

Assignee

Covestro Intellectual Property GmbH & Co. KG · DE

Inventors

Alexander Meyer · Mülheim an der Ruhr, DE
Ulrich Liesenfelder · Bensberg, DE
John Huggins · Enfield, US

Key dates

Filing date	Mar 30, 2020
Grant date	Apr 30, 2024
Priority date	—
Expiry date	Jul 16, 2040

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G64/186
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a method for preparing a polysiloxane-polycarbonate block co-condensate, wherein a siloxane component containing both aliphatic and aromatic groups is used as a mediator. The invention also relates to a polycarbonate composition and also to the use of the special siloxane component for reducing the particle size distribution of the siloxane domains in a polysiloxane-polycarbonate block co-condensate.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.