| abstract |
An aqueous dispersion suitable for use as various coatings is provided. The dispersion includes polyester resin (A), a water soluble organic compound (B), water (C), and a neutralizer (D). The poylester resin has an acid number of 50 equivalents/10⁶ g or more. The polycarboxylic acid component of the resin contains aromatic dicarboxylic acid having no metal sulfonate groups in an amount in the range of 50 to 99.99 mole percent, and dicarboxylic acid having a metal sulfonate group in an amount in the range of 0.01 to 20 mole percent based on the total moles of the polycarboxylic acid component. The polyol component of the resin contains diol in an amount in the range of 30 to 100 mole percent based on the total moles of the polyol component. The diol has an alkyl group with 1 to 3 carbon atoms on a side chain, and the total number of carbon atoms in the diol is 6 to 25. The water soluble organic compound has a boiling point in the range of 60 to 250°C. The components (A), (B), and (C) are contained in the dispersion in an amount in the range of 1 to 70 percent by weight, 0 to 69 percent by weight, and 9 to 99 percent by weight, respectively. Further, the components (A), (B), (C), and (D) satisfy the following expressions (1) and (2): B/(B + C) (weight ratio) = 0-0.7 D/A (equivalent ratio) = 0.1-20 |