Patent · US Active

Method for producing polycarbonate

US11459424B2 · kind B2 · utility

0Cited by

0References

15Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Jan Heijl · Loferer, DE
Rolf Bachmann · Busswil, CH
Volker Michele · Cologne, DE
Felix Cock · Wilrijk, BE

Key dates

Filing date	Dec 12, 2018
Grant date	Oct 4, 2022
Priority date	—
Expiry date	Jun 17, 2039

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G64/24
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for preparing polycarbonate by the phase interface process in the presence of at least one catalyst, wherein immediately after the optionally first addition of the at least one catalyst, from 0.01 to 20 J/kg of mixing energy is introduced into the system comprising the at least one catalyst within a time of from 2 to 1200 s. A mixture, an organic phase, and a process for distributing at least one catalyst in a system comprising an organic phase and an aqueous phase are also disclosed herein.

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