Patent ID: 7199200

Claim:
A process for producing homo-, co- and block copolymers by controlled radical polymerization in aqueous solution, comprising reacting a monomer component (A) comprising at least one radically polymerizable monomer, an initiator component (B) comprising at least one radical initiator, a polysaccharide component (C) comprising at least one cyclic polysaccharide or polysaccharide derivative and a regulator component (D) comprising at least one compound of the general formula (Ia) or (Ib) are reacted in the presence of water, wherein R 1 , R 3 , R 4 and R 5 each independently represent hydrogen, an optionally substituted C 1 –C 20 alkyl residue, C 3 –C 8 cycloalkyl residue, C 7 –C 34 aralkyl residue or aromatic C 6 –C 14 hydrocarbon residue in which the substituents are selected from the group consisting of OH, SH, NH 2 , NHR 13 , N(R 13 ) 2 , NH 3 + , NH 2 R 13 + , NH(R 13 ) 2 + , N(R 13 ) 3 + CN, SO 3 X, PO 3 X 2 , CO 2 X and CHO, wherein X denotes H, an alkali or alkaline earth ion and R 13 denotes a C 1 –C 5 alkyl residue, R 2 and R 5 each independently represent hydrogen, an optionally substituted C 1 –C 20 alkyl residue, C 3 –C 8 cycloalkyl residue, C 7 –C 34 aralkyl residue or aromatic C 6 –C 14 hydrocarbon residue, or a polymer residue having an average molecular mass (number average) of 100 to 50,000 Daltons, and at least two but at most four of the residues R 1 to R 6 represent an aromatic hydrocarbon residue.