Patent ID: 6713564
Filing Date: 2004-03-30
Classification: C08F,C08G

Abstract:
A star block copolymer characterized in that an arm moiety (A) comprises a polymer chain (A1) consisting of only a repeated unit represented by the general formula (I): wherein R1 represents a hydrogen atom or a methyl group; R2 represents a hydrogen atom or a C1 through C6 alkyl group; and p represents 1 or 2 wherein R2 may be identical or different when p is 2, in the star block copolymer having the arm moiety composed of a central core and polymer chains extending from the central core;or having a repeated unit represented by one of the general formulae (I) and (II): wherein R3 represents a hydrogen atom or a methyl group; R4 represents a C1 through C6 alkyl group; R5 represents an acidolytic/leaving group; q represents 0, 1 or 2 wherein R4 may be identical or different when q is 2;the general formulae (I) and (III): wherein R6 represents a hydrogen atom, a methyl group or an aryl group which may have substituents; R7 represents a C1 through C6 alkyl group; r represents 0, 1 or 2 wherein R7 may be identical or different when r is 2; andthe general formulae (I), (II) and (III): wherein R3, R4, R5, and q are the same as mentioned above.