Patent · US Expired

Preparation of aromatic polycarbonates, aromatic polyester carbonates and aromatic polyesters with organic phase comprising mixture of hydrocarbons

US4946927A · kind A · utility

1Cited by

8References

7Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Wolfgang Ebert · Krefeld, DE
Rolf-Volker Meyer · Krefeld, DE
Rolf Dhein · Krefeld, DE
Udo Oels · Krefeld, DE

Key dates

Filing date	Mar 30, 1989
Grant date	Aug 7, 1990
Priority date	—
Expiry date	Mar 30, 2009

Classification

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

Abstract

The present invention relates to a process for the preparation of aromatic polycarbonates, aromatic polyester carbonates and aromatic polyesters by the known two phase interface process, which is characterized in that the organic phase used is a mixture of aromatic hydrocarbons with alkanes and/or cycloalkanes.

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