| abstract |
An object of this invention is to provide acrylic urethane composite resin particles with a higher degree of flexibility in setting the compositions, molecular weights, etc., of the acrylic resin portion and the urethane resin portion, and excellent dispersibility, storage stability, and compatibility. As a means for achieving the object, the following acrylic urethane composite resin particles are provided: the acrylic urethane composite resin particles comprising an acrylic urethane graft resin (I) and a graft acrylic resin (II), the acrylic urethane graft resin (I) being synthesized in the presence of the graft acrylic resin (II), the graft acrylic resin (II) being a hydrophobic-chain- and hydrophilic-chain-containing resin having a weight average molecular weight of 5000 or more, the acrylic urethane graft resin (I) comprising an acrylic resin component and a urethane resin component, the acrylic resin portion of the acrylic urethane graft resin (I) being synthesized using, as constituent monomer components, 0.1 to 30 mass% of a polymerizable unsaturated monomer (1) containing a group having active hydrogen atom(s) reactive with an isocyanate group and 70 to 99.9 mass% of other polymerizable unsaturated monomer(s) (2). |