1-alkoxy-polyalkyl-piperidine derivatives and their use as polymerization regulators

A polymerizable composition, comprising

• a) at least one ethylenically unsaturated monomer or oligomer,
• b) 1-oxy-polyalkyl-piperidine compound selected from the group consisting of
• wherein
• G1, G2, G3 and G4 are independently alkyl of 1 to 4 carbon atoms with the proviso that at least one is not methyl or G1 and G2, or G3 and G4, or G1 and G2 and G3 and G4 together are pentamethylene;
• G5 and G6 independently are hydrogen or C1-C4alkyl;
• m is 1, 2, 3 or 4;
• R, if m is 1, is hydrogen, C1-C18alkyl which is uninterrupted or C2-C18alkyl which is interrupted by one or more oxygen atoms, cyanoethyl, or phosphorus-containing acid or a monovalent silyl radical;
• R, if m is 2, is C2-C12alkylene, C4-C12alkenylene, xylylene, a divalent radical of an aliphatic dicarboxylic acid having 2 to 36 carbon atoms, or a cycloaliphatic or aromatic dicarboxylic acid having 8-14 carbon atoms or of an aliphatic, cycloaliphatic or aromatic dicarbamic acid having 8-14 carbon atoms;
• or R is a divalent radical of a phosphorus-containing acid or a divalent silyl radical;
• R, if m is 3, is a trivalent radical of an aliphatic, cycloaliphatic or aromatic tricarboxylic acid,
• R, if m is 4, is a tetravalent radical of an aliphatic, cycloaliphatic or aromatic tetracarboxylic acid;
• p is 1;
• R1 is C1-C12alkyl, C5-C7cycloalkyl or benzoyl;
• and
• R2 is C1-C18alkyl, C5-C7cycloalkyl or a group of the formula —CO-Z- wherein Z is hydrogen, methyl or phenyl;
• and
• c) a radical iniator X• capable of initiating polymerization of ethylenically unsaturated monomers.