Patent ID: 6743861
Filing Date: 2004-06-01
Classification: C08F

Abstract:
An alkenylphenol copolymer comprisingComponent A containing a repeating unit represented by Formula (I) wherein, R1 is hydrogen or methyl, R2 is alkyl having 1 to 5 carbons, m is 0, 1 or 2 and R2 is the same or different when m is 2 and a repeating unit represented by Formula (II) wherein, R3 is hydrogen or methyl, R4 is a group to be eliminated and/or decomposed with an acid, R5 is alkyl having 1 to 5 carbons, n is 0, 1 or 2 and R5 is the same or different when n is 2 and Component B containing a repeating unit represented by Formula (III) wherein, R6 is hydrogen or methyl, and R7 is a group having a t-butyl group and to be eliminated and/or decomposed with an acid, of which Components A and B are bound in block in the form of Aâ€”B, has a ratio Mw/Mn of the weight-average molecular weight Mw to the number-average molecular weight Mn in a range of 1.00 and 1.50, and has no carboxylic acid residues.