Patent ID: 6479603
Filing Date: 2002-11-12
Classification: C08F

Abstract:
A process for the living free radical addition polymerization of one or more ethylenically unsaturated monomers using at least one free radical polymerization initiator selected from the group consisting of organic peroxides and inorganic peroxides and in the presence of one or more stable N-oxyl radicals, wherein at least one stable N-oxyl radical is at least one compound of the formula I or II or a mixture of: whereR1, R2, R5, R6=independently of one another identical or different straight-chain or branched, substituted or unsubstituted alkyl groups having 1 to 32 carbon atoms, it being possible for R1 and R2 and, respectively, R5 and R6 to form a ring system; R7, R8=independently of one another M+=hydrogen ion or an alkali metal ion, q=an integer from 1 to 10; and R9 in formula I=hydrogen or C1-C8 alkyl; and Râ€² and Râ€³ in formula II=independently of one another hydrogen or C1-C8 alkyl and n=0, 1, 2 or 3.