PRODUCTION OF MULTICOMPONENT AQUEOUS DISPERSION AND MULTICOMPONENT AQUEOUS DISPERSION CAPABLE OF FORMING MULTICOMPONENT FILM

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a multicomponent aqueous dispersion by which various problems such as lowness in modifying effects and uniformity of a film and complicatedness of production processes for an aqueous dispersed resin due to the lowness in compatibility, a small number of covalent bonds, etc., observed in a conventional technique such as a method for blending an aqueous polyurethane resin with other aqueous resins are solved and produce the aqueous dispersion capable of forming a multicomponent film in relation to the aqueous resin usable as an aqueous coating agent, a coating material base (binder) resin or its modifier resin and the method for producing the aqueous resin. SOLUTION: A polyurethane prepolymer having hydrolyzable silicons in the molecule is dispersed in an aqueous dispersion of an acrylic resin having hydrolyzable silicons in the molecule. The polyurethane prepolymer and the aqueous dispersion of the acrylic resin having the hydrolyzable silicons are preferably used at a weight ratio of the polyurethane prepolymer to the aqueous dispersion of the acrylic resin within the range of (0.5-99.5)/(99.5-0.5) expressed in terms of the weight ratio of solid contents.