Patent · US Active

Preparation of highly heat-resistant (co)polycarbonates by the transesterification method

US10370491B2 · kind B2 · utility

0Cited by

3References

15Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Ivan Sluijs · Boechout, BE
Jan Heijl · Loferer, DE
Erik Sluyts · Brasschaat, BE
Frank Bruynseels · Dendermonde, BE

Key dates

Filing date	Jan 20, 2016
Grant date	Aug 6, 2019
Priority date	—
Expiry date	Jan 26, 2036

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G64/307
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a melt transesterification process for the production of (co)polycarbonates from diaryl carbonates and cycloalkylidene diphenols, which process comprises the addition of a monohydroxyaryl compound in an amount of 5.0 to 20.0 wt.-%, based on the total mass of the reaction mixture. The invention further relates to a (co)polycarbonate obtained by the process.

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