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:
Nov. 02, 1993
Filed:
Aug. 20, 1991
Hans-Rudolf Meier, Marly, CH;
Paul Dubs, Marly, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
Sulfoxides of alkylthiomethylphenols of the formula I ##STR1## in which R.sub.1 is hydrogen, C.sub.1 -C.sub.20 alkyl, C.sub.2 -C.sub.18 alkenyl, C.sub.5 -C.sub.7 cycloalkyl, C.sub.5 -C.sub.7 cycloalkenyl, phenyl or C.sub.7 -C.sub.9 phenylalkyl, R.sub.2 is hydrogen, C.sub.1 -C.sub.20 alkyl, C.sub.2 -C.sub.18 alkenyl, C.sub.5 -C.sub.7 cycloalkyl, C.sub.5 -C.sub.7 cycloalkenyl, phenyl, C.sub.7 -C.sub.9 phenylalkyl or a radical --CH.sub.2 --SO--R.sub.5, in which R.sub.5 is C.sub.8 -C.sub.20 alkyl which may be interrupted by --O--, --S-- or --SO-- groups, mono- or dihydroxy-substituted C.sub.2 -C.sub.12 alkyl, phenyl, benzyl, --(CH.sub.2).sub.n COOR.sub.6 or --CH(CH.sub.3)COOR.sub.6, in which R.sub.6 is C.sub.1 -C.sub.20 alkyl and n is 1 or 2, R.sub.3 is hydrogen or a group --CH.sub.2 --SO--R.sub.5, in which R.sub.5 is as defined above, and R.sub.4 has the same meanings as R.sub.2 , with the proviso that only one of the radicals R.sub.2, R.sub.3 or R.sub.4 is the group --CH.sub.2 --SO--R.sub.5 and that, if R.sub.4 is --CH.sub.2 --SO--R.sub.5 and R.sub.1 and R.sub.2 are simultaneously tert-butyl or tert-amyl, R.sub.5 is not C.sub.8 -C.sub.14 alkyl, or mixtures of these compounds with the corresponding non-oxidised compounds are suitable for stabilising organic materials which are sensitive to oxidative, thermal and/or light-induced degradation.