Patent · US Expired

Polypropylene stabilizing anti-oxidant 2,3-dihydrobenz-4-oxa-1-thiin derivatives, compositions and method of use therefor

US4621109A · kind A · utility

1Cited by

0References

4Claims

0Family size

Assignee

BASF SE

Inventors

Peter Lechtken · Bischofswerda, DE
Hubert Trauth · Dudenhofen, DE
Stefan Weiss · Trostberg, DE
Albert Hettche · Heßheim, DE

Key dates

Filing date	Jun 11, 1985
Grant date	Nov 4, 1986
Priority date	—
Expiry date	Jun 11, 2005

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D327/06
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

2,3-Dihydrobenz-4-oxa-1-thiins of the general formula I ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are each hydrogen, methyl or methoxy, and R.sup.2 and R.sup.3 together may furthermore be a fused benzene ring, R.sup.4 is hydrogen or an m-valent aliphatic hydrocarbon radical which may be interrupted by sulfur and /or carry thiol groups as substituents, or is halogen when n is zero, X is --O--, --S-- or --O--CO--, m is 1 or 2 and n is zero or 1, are useful as antioxidants for organic materials.

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