| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject aqueous dispersion capable of dispersing a synthetic resin in water, etc., in a short time and suppressing deterioration of the resin without applying high load to production facility and useful as a coating material, ink, a coating agent, etc., by charging a specific synthetic resin, water, etc., into a twin-screw extruder to disperse the resin in water. SOLUTION: A synthetic resin having ionic functional group such as sulfonic acid or carboxylic acid (salt) or a functional group changeable to the ionic group, e.g. a polyester-based resin or a polyurethanebased resin, water and as necessary, an organic solvent are charged into a twin-screw extruder and the synthetic resin is dispersed in water, etc., to provide the objective aqueous dispersion of synthetic resin. |
