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US 4,540,732 AGranted
Alkylated S-(hydroxyphenylthio) alkanoates
AssigneeCiba-Geigy Corporation
InventorsJohn D. Spivack, Stephen D. Pastor, Paul Odorisio
Life of this patent
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Abstract
The title compounds correspond to the formula ##STR1## and are useful as stabilizers for organic polymers and lubricating oils to counteract the degradative effects of heat, light and air.
Claims9
The compound of the formula ##STR7## wherein R and R.sub.1 are alkyl of 1 to 18 carbon atoms, cycloalkyl of 5 to 6 carbon atoms, phenyl, phenyl substituted by alkyl of 1 to 18 carbon atoms, aralkyl of 7 to 9 carbon atoms or said aralkyl substituted by alkyl of 1 to 18 carbon atoms;
- A is --CH(R.sub.2)--, --CH(R.sub.2)CH(R.sub.3)-- or --CH.sub.2 --CH(R.sub.2)--CH.sub.2 --;
- and
- R.sub.2 and R.sub.3 are independently hydrogen or methyl.
Dependencies are inferred from the claim text.