| 摘要 |
AZODICARBOXYLIC ACID DERIVATIVES CONTAINING HINDERED AMINE MOIETIES AS POLYMER STABILIZERS New azo compounds of formula I <IMG> I where R1 is hydrogen, oxyl, hydroxyl, alkyl, allyl, benzyl, alkoxy or acyl, X is -O- or -NR-where R is hydrogen or alkyl, and E is a group of formula IV <IMG> ; IV or as described in claim 1, are useful for the stabilization of polymers, particularly unsaturated elastomers, by being grafted thereon.
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