Alkanediphenols
AssigneeCiba-Geigy Corporation
InventorsRita Pitteloud, Paul Dubs, Bernard Gilg
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Abstract
Compositions comprising an organic material which is sensitive to thermal, oxidative and/or actinic degradation and at least one compound of the formula I ##STR1## in which Z.sub.1 and Z.sub.2 independently of one another are C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.8 cycloalkyl, phenyl, phenyl-C.sub.1 -C.sub.4 alkyl or (C.sub.1 -C.sub.4 alkyl)phenyl and p is a number from 4 to 18, with the proviso that Z.sub.1 and Z.sub.2 are not simultaneously tertiary alkyl radicals. Some of the compounds of the formula I are novel. The compounds of the formula I can also be employed as stabilizers as a mixture with compounds of the formula VI and/or of the formula VII ##STR2## in which n and the radicals R.sup.1, R .sup.1 ' and A are as defined in claims 14 and 15.
Claims10
A composition comprising (a) a styrene copolymer which is sensitive to thermal, oxidative or actinic degradation and (b) an effective stabilizing amount of a compound of the formula I ##STR17## in which Z.sub.1 and Z.sub.2 independently of one another are C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.8 cycloalkyl, phenyl, phenyl-C.sub.1 -C.sub.4 alkyl or C.sub.7 -C.sub.10 alkylphenyl and
- p is a number from 4 to 18,
- with the proviso that Z.sub.1 and Z.sub.2 are not simultaneously tertiary alkyl radicals.
A compound of the formula I ##STR18## in which Z.sub.1 and Z.sub.2 independently of one another are C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.8 cycloalkyl, phenyl, phenyl-C.sub.1 -C.sub.4 alkyl or C.sub.7 -C.sub.10 alkylphenyl and
- p is a number from 4 to 10,
- with the proviso that if the two radicals Z.sub.1 and Z.sub.2 are C.sub.1 -C.sub.18 alkyl, one of the radicals is branched C.sub.1 -C.sub.18 alkyl, and with the proviso that the two radicals Z.sub.1 and Z.sub.2 are not simultaneously tertiary alkyl radicals, and with the proviso that the compound 1,4-bis(3'-tert-butyl-5'-methyl-4'-hydroxyphenyl)butane is not included.
Dependencies are inferred from the claim text.