Alkylidene-bisphenols containing sulphur, and their use as stabilizers
AssigneeCiba-Geigy Corporation
InventorSiegfried Rosenberger
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Abstract
1,1-Bis-(3-alkyl-2-hydroxyphenyl)-3-alkylthio-butanes to -pentadecanes in which the alkyl, which is in the 3-position, is not branched at the .alpha.-carbon atom, are good stabilizers for elastomers.
Claims9
A compound of the general formula I ##STR8## wherein R.sub.1 is an alkyl group which has 1 to 18 carbon atoms and which is not branched in the .alpha.-position, R.sub.2 denotes a linear or branched alkyl group having 1 to 8 carbon atoms, or a hydrogen atom, R.sub.3 denotes an alkyl group having 1 to 6 carbon atoms and R.sub.5 denotes a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and R.sub.4 denotes a linear or branched alkyl group having 1 to 20 carbon atoms wherein the carbon chain can be interrupted by sulphur atoms.
Dependencies are inferred from the claim text.