| 摘要 |
The invention relates to reaction products suitable as antioxidants which are substantially liquid at room temperature and which are obtained by the reaction of olefins with mixtures of diphenylamines and phenothiazines which may be alkylated. These products are obtainable by reacting an olefin of formula R1R2C=CHR3 (I) with a mixture of compounds of formulae II and III <IMG> (II), <IMG> (III) in the presence of an acid catalyst, wherein R1 is hydrogen, C1-C25alkyl or phenyl, R2 is C1-C25alkyl, benzyl or phenyl, R3 is hydrogen or C1-C12alkyl, R4, R*4, R5 and R*5 are each independently of one another hydrogen, C1-C25alkyl,C5-C12cycloalkyl, benzyl, .alpha.-methylbenzyl or .alpha.,.alpha.-dimethylbenzyl, and R6 and R*6 are each independently of the other hydrogen, C1-C18alkyl, C3-C4alkenyl, benzyl or a radical of formula -CH(R9)-CH(R10)-S-R11, and R7 and R8 are hydrogen, or together form a divalent group <IMG> , R9 and R10 are each independently of the other hydrogen, phenyl or C1-C12alkyl, R11 is C4-C18alkyl, phenyl or -(CH2)a-CO-OR12, a is 1 or 2, and R12 is C1-C18alkyl.
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