| abstract |
PURPOSE: To prepare an aqueous dispersion having excellent storage stability and giving a film having high water resistance, by mixing a polyester resin consisting of a specific polycarboxylic acid component and a polyol component, a water-soluble organic compound, and water, at specific ratios. n CONSTITUTION: The objective dispersion is prepared by mixing (A) a polyester resin having a molecular weight of 2,500W30,000, and a softening point of 40W 200°C, and consisting of (i) a polycarboxylic acid component composed of 92.6W 99.9mol% of an aromatic dicarboxylic acid which does not contain a sulfonic acid metal salt group and 0.1W7.4mol% of an aromatic dicarboxylic acid containing sulfonic acid metal salt group, and (ii) a polyol component composed of 10W 100mol% of diethylene glycol and 0W90mol% of a 2W8C aliphatic glycol, a 6W15C cycloaliphatic glycol, or adduct of bisphenol A and ethylene oxide or propylene oxide. (B) a water-soluble organic compound having a boiling point of 60W200°C, and (C) water, at the ratios which satisfy the conditions of formula I, formula II and formula III. n COPYRIGHT: (C)1982,JPO&Japio |