Two-component acrylic-urethane coating material

摘要

Said material contains: (i) a graft copolymer whose molecule contains a functional group which is able to react with isocyanate groups, obtainable by free-radical copolymerisation of a macromonomer having a number-average molecular weight of from 1000 to 20,000 and having a (meth)acryloyl group at one end of the molecule, and containing 75 per cent by weight or more, based on the total quantity of all monomer units, of a monomer unit comprising a monomer of the general formula: CH2 = CR1R2 in which R1 is H or CH3 and R2 is phenyl, nitrile or COOR3 (where R3 is a saturated aliphatic or alicyclic hydrocarbon group of 1 to 20 carbon atoms) with an alkyl (meth)acrylate or an alkyl (meth)acrylate and another monomer which is copolymerisable therewith; and (ii) a polyisocyanate compound.