Patent ID: 8889780

Claim:
A two-component polyurethane coating composition, comprising as synthesis components: (A) at least one polyisocyanate obtained by a process comprising reacting at least one monomeric isocyanate; (B) at least one hydroxyl-containing poly(meth)acrylate polyol; and (C) at least one non-crosslinked hyperbranched polyester polyol, wherein the non-crosslinked hyperbranched polyester polyol (C) is obtained by either: (i) a process comprising polycondensing (a) at least one dicarboxylic acid A 2 or a derivative thereof, (b) optionally at least one tricarboxylic acid or polycarboxylic acid A x or a derivative thereof, and (c) at least one triol or polyol B y , said process (i) occurring in the absence of a diol B 2 ; or (ii) a process comprising polycondensing (d) at least one tricarboxylic acid or polycarboxylic acid A x or a derivative thereof, (e) at least one diol B 2 , and (f) optionally at least one triol or polyol B y , said process (ii) occurring in the absence of a dicarboxylic acid A 2 or derivatives thereof, wherein: x independently represents an integer greater than or equal to 3, and corresponds to a number of carboxyl groups represented by A; y independently represents an integer greater than or equal to 3, and corresponds to a number of hydroxyl groups represented by B; the non-crosslinked hyperbranched polyester polyol (C) has an acid number of 5 to 100 mg KOH/g; and the poly(meth)acrylate polyol (B) has a molecular weight M n (number average) of 500 to 50,000.