Patent ID: 6716918
Filing Date: 2004-04-06
Classification: C08F,C08L,C09D,C09J

Abstract:
A process for producing a block copolymer, comprising at least the following step (i) and step (ii):(i) forming a first block chain, said step (i) comprising polymerizing (d2) an acrylate-based monomer in the presence of (c2) a redox catalyst comprising a metal complex containing at least one transition metal (M) as a central metal selected from the group consisting of elements of Groups 7 to 11 of the Periodic Table, and a ligand containing at least a halogen atom selected from the group consisting of bromine and iodine, using (b2) a polymerization initiator selected from the group consisting of bromine- or iodine-containing organic halides and bromine- or iodine-containing halogenated sulfonyl compounds; and (ii) forming a second block chain, said step (ii) comprising polymerizing (d3) a methacrylate-based monomer in the presence of (c3) a redox catalyst comprising a metal complex containing at least one transition metal as a central metal selected from the group consisting of elements of Groups 7 to 11 of the Periodic Table and a ligand containing at least a halogen atom selected from the group consisting of chlorine and fluorine, said redox catalyst containing a low-valence metal (M)n wherein n represents an atomic valence of the metal, and a high-valence metal (M)n+1 both constituting the redox catalyst system, and having a molar ratio of (M)n to (M)n+1 of 90/10 to 0.1/99.9, upon initiation of the polymerization for forming the second block chain.