Patent ID: 6710146
Filing Date: 2004-03-23
Classification: C08F,C08K

Abstract:
A process for preparing an oligomer, a cooligomer, a polymer or a copolymer (block or random) by free radical polymerization of at least one ethylenically unsaturated monomer or oligomer, which comprises (co)polymerizing the monomer or monomers/oligomers in the presence of a compound of formula (i) in which n is the number 1 or 2, and R1 is a group of the formula in whichG1 and G2 are hydrogen, methyl or, together, are a substituent &boxH;O, E is â€”Oâ€” or â€”ND3-, A is C2-C6alkylene or â€”(CH2)3â€”Oâ€” and x1 is the number 0 or 1, D3 is hydrogen, C1-C12alkyl, C2-C5hydroxyalkyl or C5-C7cycloalkyl, R2 is identical to R1 or is one of the groups â€”N(G21)(G22), â€”OG23, â€”N(H)(CH2OG23) or â€”N(CH2OG23)2, R3, if n=1, is identical to R1 and, if n=2, is an â€”Eâ€”D4â€”Eâ€” group, in which D4 is C2-C8alkylene or C2-C8alkylene which is interrupted by 1 or 2 â€”NG21-groups, G21 is C1-C12alkyl, cyclohexyl, benzyl or C1-C4-hydroxyalkyl or a group of the formula G22 is C1-C12alkyl, cyclohexyl, benzyl or C1-C4hydroxyalkyl, and G23 is hydrogen, C1-C12alkyl or phenyl, or G21 and G22 together are C4-C5alkylene or C4-C5oxaalkylene, for example â€”CH2CH2â€”Oâ€”CH2CH2â€”, or a group of the formula â€”CH2CH2â€”N(G11)â€”CH2CH2â€”;and, wherein G11 is â€”Oâ€”X a) under reaction conditions capable of effecting scission of the Oâ€”X bond to form two free radicals, the radical .X being capable of initiating polyermization; or G11 is O. b) additionally in the presence of a free radical source, liberating a free radical which is capable of initiating polymerization.