Patent · US Expired

Process for the preparation of aromatic polycarbonates by the phase boundary process

US4367330A · kind A · utility

4Cited by

9References

3Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Uwe Hucks · Alpen, DE
Erhard Tresper · Krefeld, DE

Key dates

Filing date	Sep 16, 1980
Grant date	Jan 4, 1983
Priority date	—
Expiry date	Sep 16, 2000

Classification

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

Abstract

The present invention relates to an improvement in the phase boundary polycondensation process for the preparation of aromatic, in particular thermoplastic, polycarbonates comprising carrying out the process in the presence of a saturated solution of alkali metal salts.

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