| abstract |
The present invention provides a polyurethane resin composition which is excellent in moisture-resistant transparency, adhesion to a photo-curable resin, and excellent in blocking resistance, and which has less warpage and is suitable for use in an optical film. The aqueous polyurethane resin composition of the present invention is obtained by preparing a urethane prepolymer (A) and a specific (meth)acrylic compound (B) with the above amine group. A urethane prepolymer composition containing the amount of the formate prepolymer (A) and the (meth)acrylic compound (B) in an amount of from 100:1 to 30 (mass ratio), the amine The urethane prepolymer (A) is obtained by reacting a polyol (a), a polyisocyanate (b) and an anionic group introducing agent (c), and then constituting the above urethane prepolymer The urethane prepolymer (A) and the chain in the obtained aqueous dispersion are dispersed in water so that the concentration of the urethane prepolymer composition is 10 to 70% by mass. The elongation agent (C) is reacted. |