| abstract |
Compounds of the formula I <IMAGE> (I) wherein R1 is hydrogen, chlorine, lower alkyl or lower alkoxy, R2 is hydrogen or alkyl, R3 is lower alkenoyl, X and Y are independently -O- or -NH-, m is 0, 1 or 2 and n is 0 or 1, are suitable as copolymerizable UV stabilizers for polymers obtainable from ethylenically unsaturated monomers. The compounds of the formula I are readily obtainable, and are particularly valuable as UV absorbers by virtue of their good solubility in copolymerizable monomers. |