Diones and their use as polymer stabilizers
AssigneeCiba-Geigy Corporation
InventorsSiegfried Rosenberger, Andreas Schmidt
Life of this patent
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Abstract
Compounds of the formula I ##STR1## wherein A is alkylidene or optionally alkylated vinylene, B is a group of the formula II ##STR2## wherein R.sub.1 and R.sub.2 are alkyl, R.sub.3, R.sub.4 and R.sub.5 are hydrogen or alkyl and n is 0, 1 or 2 and m is 1 or 2, and X is identical to B if m equals 1 or X is methylene if m equals 2, as stabilisers for organic material.
Claims9
A compound of the formula ##STR7## wherein A is alkylidene, B is a group of the formula ##STR8## wherein R.sub.1 and R.sub.2 are alkyl, R.sub.3, R.sub.4 and R.sub.5 are hydrogen or alkyl and n is 0, 1 or 2 and m is 1 or 2, and X is identical to B if m equals 1 or X is methylene if m equals 2.
Dependencies are inferred from the claim text.