| 摘要 |
A polycarboxylic acid composition containing: a carboxylic acid compound (J) obtained by the addition reaction of a silicone oil (a) represented by formula (1) and a compound (b) having at least one carboxylic acid anhydride group in the molecule; and a polycarboxylic acid compound (K) obtained by the addition reaction of a polyhydric alcohol-modified lactone polymer (c), obtained by ring-opening addition polymerization of a C4-8 lactone to a polyhydric alcohol having a bifunctional or higher alcoholic hydroxyl group, and a compound (d) having at least one carboxylic acid anhydride group in the molecule. In formula (1), R1 represents a C1-10 alkylene group optionally interrupted by an ether bond, and each R2 independently represents a methyl group, phenyl group, or cyclohexyl group; n signifies the mean number of repetitions and is 1 to 100. |
