| 摘要 |
PURPOSE:To produce the titled compsn. which has excellent film-forming properties, gives a coating film having excellent adhesion and resistance to wear and water and is stable at a high concn., by polymerizing a radical- polymerizable monomer in the presence of an aq. soln. of a urethane resin. CONSTITUTION:A prepolymer obtd. by subjecting a diisocyanate (e.g., 2,4-tolylene diisocyanate), a glycol (e.g., ethylene glycol) and a glycol having a carboxyl group (e.g., 2,2-dimethylolpropionic acid) to a urethane-forming reaction, is neutralized and the molecular chain thereof is then lengthened. Water is added thereto to obtain an aq. soln. of a urethane resin having an acid value of 20-150. 99-5wt% radical-polymerizable monomer (e.g., an acrylic ester) is emulsion-polymerized in the presence of 1-95wt% (on a solid basis) said aq. soln. of the urethane resin and a radical polymn. initiator at 40-80 deg.C.
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