Patent ID: 6573346
Filing Date: 2003-06-03
Classification: C07D,C08F

Abstract:
A process for the preparation of telechelics corresponding to the formula HOâ€”Bâ€²â€”Qâ€”Câ€”Bâ€²â€³ and having a molecular weight 200n<50,000, wherein Q corresponds to the formula whereinn is an integer in the range of 3&lE;n&lE;500 and Râ€², Râ€³ and Râ€²â€³ are the same or different and represent H, C1-C20-(cyclo)alkyl, C6-C24-aryl, halogen, CN, C1-C20-alkyl ester or -amide or C6-C24-aryl ester or -amide, wherein the preceding groups may be substituted or unsubstituted, or the R groups can also be a constituent of a ring structure in a cyclic anhydride, ester, amide or hydrocarbon, which comprises reacting A) a monomer A, which can be polymerized by free radicals and corresponds to the formula CHRâ€²&boxH;CRâ€³Râ€²â€³â€ƒwith B) a functionalized alkoxyamine initiator B of the formula I: â€ƒwherein Bâ€² represents HOâ€”CR1â€”CR2R3â€”, Bâ€³ represents â€”Oâ€”NR4R5, R1, R2 and R3 are the same or different and represent H, C1-C20-(cyclo)alkyl, C6-C24-aryl, halogen, CN, C1-C20-(cyclo)alkyl-ester or -amide or C6-C24-aryl-ester or -amide, and R4 and R5 are the same or different and represent aliphatic, cycloaliphatic or mixed aliphatic/aromatic radicals having 1-24 carbon atoms, which can also be part of a 4- to 8-membered ring, wherein the carbon atom of the radicals R4 and R5 directly adjacent to the alkoxyamine nitrogen atom is in each case substituted by 3 further organic substituents or a double-bonded carbon, oxygen, sulfur or nitrogen atom and a further organic substituent, and C) a functionalizing reagent C corresponding to the formula R14R15C&boxH;CR16(R17â€”Y), â€ƒwherein R17 represents a linear or branched, optionally substituted alkyl chain, R14, R15 and R16 are the same of different and represent hydrogen or an optionally aryl- or halogen-substituted alkyl radical and Y represents a functional group which is reactive with an isocyanate, alcohol, carboxylic acid, anhydride and/or epoxide.