Abstract
Anti-ozonant efficiency of p-aminophenol and p-phenylenenediamine derivatives that contained alkyl groups as methoxypropyl and dimethylaminopropyl groups was estimated by the ozone absorption in chloroform solution and the priventive rate of viscocity decrease of polyisoprene-chloroform solution.
The results were obtained that the both p-aminophenol and p-phenylendiamine derivatives that contained the N atom on substituent were more effective than not containing.
The order of anti-ozonant efficiency of the derivatives was Me (CH2)3-<MeO(CH2)3-_??_Me2N(CH2)3-.
In this case, the efficiency of methoxypropyl group was slightly more effective than n-butyl group, but that of dimethylaminopropyl group that contained N atom on substituent was remarkably more effective than methoxypropyl and n-butyl groups.
Theefore, it seemed that the N atom on substituent was related to reaction with ozone.
Besides, the difference between anti-ozonant efficiency of N′-alkyl and cyclohexyl derivatives of N, N′-dimethylaminopropyl-p-phenylenediamine was not observed.
