| abstract |
The novel antioxidants of the formulae I and II in which R 1 is methyl or H, preferably H, R 2 is H or methyl, preferably H, R 3 is H or C 1 -C 4 alkyl, preferably H, R 4 is C 1 -C 5 alkyl, preferably t-Bu, R 5 is C 1 -C 5 alkyl, preferably Me or t-Bu and the group Z is CH 2 or O, preferably CH 2 , are particularly suitable for stabilizing styrene (co)polymers. |