Polycarbonate-modified acrylic resin, paint, and plastic molded article painted by said paint

A polycarbonate-modified acrylic resin, which is a reaction product of a polycarbonate diol (A) obtained by using 1,5-pentanediol and 1,6-hexanediol as raw materials, and an unsaturated monomer mixture (B) containing:

• methyl methacrylate,
• an unsaturated monomer (b1) having a hydroxyl group,
• an unsaturated monomer (b2) having a carboxyl group, and
• an unsaturated monomer (b3) having an alkyl group having 2 to 8 carbon atoms
• as essential components,
• wherein the mass proportion of the unsaturated monomer (b2) in the unsaturated monomer mixture (B) is in the range of 2 to 10% by mass;
• and
• wherein the unsaturated monomer (b2) in the unsaturated monomer mixture (B) is one or more selected from the group consisting of (meth)acrylic acid, crotonic acid, β-carboxyethyl (meth) acrylate, ω-carboxy-polycaprolactone mono(meth)acrylate, 2-(meth)acryloyloxyethyl succinate, 2-(meth)acryloyloxyethyl hexahydrophthalate, maleic acid, fumaric acid, itaconic acid, and a half ester of one or more of maleic acid, fumaric acid, and itaconic acid.