Patent · US Expired

Method of preparing aliphatic-aromatic polycarbonates

US5410014A · kind A · utility

33Cited by

9References

7Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Wilfried Haese · Rheydt, DE
Ralf Pakull · Krefeld, DE
Gerhard Fennhoff · Willich, DE
Jurgen Kirsch · Cologne, DE

Key dates

Filing date	Dec 17, 1993
Grant date	Apr 25, 1995
Priority date	—
Expiry date	Dec 17, 2013

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G64/1608
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A method of preparing aliphatic-aromatic polycarbonate resin is disclosed. Accordingly, the method entails reacting an oligocarbonate of diphenol having chlorocarbonic acid ester terminal groups, with an aliphatic diol, in a non-aqueous solvent. The amount of solvent is such that the oligocarbonate is about 10-40% relative to the total weight of solvent, oligocarbonate and diol.

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