Patent · US Active

Process for producing a polycarbonate using an organic solvent based on chlorohydrocarbons

US11149116B2 · kind B2 · utility

0Cited by

1References

13Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Jan Heijl · Loferer, DE
Erik Sluyts · Brasschaat, BE
Xiaoxin Yao · Shanghai, CN

Key dates

Filing date	Dec 12, 2018
Grant date	Oct 19, 2021
Priority date	—
Expiry date	Jan 3, 2039

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G64/406
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a process for producing a polycarbonate from a diphenol or two or more different diphenols and a carbonyl halide by the interfacial process. It is a feature of the process according to the invention that it is carried out on the basis of a chlorohydrocarbon or a mixture of a mixture of two or more chlorohydrocarbons using an organic solvent. An organic solvent is also provided.

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