Patent · US Expired

Process for the production of polyarylene (sulphides) having an increased thermal and chemical resistance and an improved color quality

US4451644A · kind A · utility

4Cited by

6References

4Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Edgar Ostlinning · Goldkronach, DE
Karsten-Josef Idel · Krefeld, DE
Otto Neuner
Ludwig Bottenbruch · Krefeld, DE

Key dates

Filing date	Feb 8, 1983
Grant date	May 29, 1984
Priority date	—
Expiry date	Feb 8, 2003

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G75/029
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to a process for the preparation of polyarylene sulphides in alkylated polyureas at a temperature of 250.degree. to 290.degree. C. under a pressure from 4 to 50 bars.

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