Patent · US Expired

Benzofuranone or indolinone compounds useful as stabilizers for organic materials

US4325863A · kind A · utility

148Cited by

13References

24Claims

0Family size

Assignee

Sandoz AG · CH

Inventors

Hans Hinsken · Lörrach, DE
Horst Mayerhoefer · Oberwil, CH
Wolfgang Mueller
Hermann Schneider · Schweich, DE

Key dates

Filing date	Feb 4, 1980
Grant date	Apr 20, 1982
Priority date	—
Expiry date	Feb 4, 2000

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08K5/3417
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a process for stabilizing organic polymeric materials comprising incorporating therein a benzofuran (2) one or indolin (2) one compound as stabilizer. Such stabilized polymeric materials are stabilized against degradation during the polymer processing.

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