Patent ID: 7084203

Claim:
An anionic-group-containing polymer represented by following Formula (2) having an alkoxysilyl group at its end, a salt thereof, or a hydrolyzed polymer being derived from the polymer or the salt thereof and comprising a hydrolyzed alkoxysilyl group: W NH—CO—X) n (2) wherein W is a residue corresponding to a skeleton of an anionic-group-containing polymer; the nitrogen atom combined with W is a nitrogen atom derived from an isocyanate group at the end of the anionic-group-containing polymer; W has a structural unit represented by following Formula (2a): NH—CO—V—Y—V—CO—NH—Z (b 2a) wherein Y is one of a residue derived from a compound (A1) containing no anionic group and having plural isocyanate-reactive groups and a residue derived from a compound (A2) having an anionic group and plural isocyanate-reactive groups; V combined with Y is a group derived from one of the isocyanate-reactive groups of the compound (A1) and the compound (A2), wherein both the residue derived from the compound (A1) and the residue derived from the compound (A2) as Y are contained in the polymer; Z is a residue derived from a polyisocyanate compound (A3), wherein a nitrogen atom combined with Z and a nitrogen atom on the opposite side to Z are nitrogen atoms derived from isocyanate groups of the polyisocyanate compound (A3); X is an alkoxysilyl-containing group represented by any one of following Formulae (2b), (2c), and (2d): wherein R 7 and R 8 are the same or different and are each an alkyl group; R 9 is an alkylene group; R 10 and R 12 are the same or different and are each a hydrogen atom or an alkyl group; R 11a is a hydrogen atom or an alkyl group; R 13 is an alkyl group, an aryl group, or a cycloalkyl group; and m is an integer from 1 to 3: wherein R 7 and R 8 are the same or different and are each an alkyl group; R 9 and R 14 are the same or different and are each an alkylene group; R 10 and R 12 are the same or different and are each a hydrogen atom or an alkyl group; R 11 is a hydrogen atom, an alkyl group, an aryl group, an alkoxycarbonyl group, an aryloxycarbonyl group, or a cycloalkyloxycarbonyl group; R 13 is an alkyl group, an aryl group, or a cycloalkyl group; and m is an integer from 1 to 3: wherein R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 , R 14 , and m have the same meanings as defined above; and n is an integer from 1 to 4.