2,4-dimethyl-6-s-alkylphenols
AssigneeCiba-Geigy Corporation
InventorsRita Pitteloud, Paul Dubs
Life of this patent
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Abstract
A composition containing a) a polystyrene, substituted polystyrene, copolymer or terpolymer of styrene or of a substituted styrene, polycarbonate, polyester-carbonate, polyurethane, polyamide copolyamide, polyacetyl or polyphenylene oxide and b) at least one compound of the formula I ##STR1## in which R.sub.1 is methyl or ethyl and R.sub.2 is C.sub.2 -C.sub.30 alkyl. Compounds of the formula I in which R.sub.2 is C.sub.8 -C.sub.30 alkyl are novel and are suitable for stabilizing organic materials against thermal, oxidative and actinic degradation.
Claims14
A composition containing a) a polystyrene, substituted polystyrene, copolymer or terpolymer of styrene or of a substituted styrene, polycarbonate, polyester-carbonate, polyurethane, polyamide, copolyamide, polyacetyl or polyphenylene oxide and b) an effective stabilizing amount of a compound of the formula I ##STR9## in which R.sub.1 is methyl or ethyl and R.sub.2 is C.sub.10 -C.sub.30 alkyl.
Compounds of the formula I, ##STR12## in which R.sub.1 is methyl or ethyl and R.sub.2 is C.sub.10 -C.sub.30 alkyl.
A mixture of the compounds ##STR13## in which R.sub.2 ' is --C.sub.m H.sub.2m+1 and R.sub.2 " is --C.sub.m-1 H.sub.2m-1 and m is an integer from 10 to 30 and is the same in the radicals R.sub.2 ' and R.sub.2 ".
Dependencies are inferred from the claim text.