The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 1998
Filed:
Jan. 29, 1997
Bernard Gilg, St. Louis-la-Chaussee, FR;
Kurt Stinsky, Basel, CH;
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Abstract
The present invention relates to synergistic mixtures of at least one 2,4-dimethyl-6-s-alkyl phenol and at least one selected sterically hindered phenol according to formula II ##STR1## The variable 'n' is 1, 2 or 4. X.sub.1 is tert-butyl. X.sub.2 is C.sub.1 -C.sub.4 alkyl. X.sub.3, when n is 1, is C.sub.1 -C.sub.20 alkyl, a triazinylamino group, or a --A.sub.1 --COO--A.sub.2 or --A.sub.1 --CONH--A.sub.2 group. X.sub.3, when n is 2, is a --E.sub.1 --COO--E.sub.2 --OOC--E.sub.3 -- or --E.sub.1 --CONH--E.sub.2 --NHCO--E.sub.3 -- group. X.sub.3, when n is 4, is �--G.sub.1 --COO!.sub.4 --G.sub.2. The instant synergistic mixtures can be used to stabilize selected organic polymers against thermal, oxidative and/or actinic degradation.