| 摘要 |
The present invention relates first to a composition of polyol resin comprising a specific acrylic polyol resin obtained from a mixture of monomers comprising a1) at least one hydroxylated, ethylenically unsaturated monomer or one monomer which is a precursor of a hydroxylated unit, and a2) at least one cycloaliphatic ethylenically unsaturated monomer, b) a diluent bearing at least two groups which are reactive with an isocyanate group, c) a urethaneization reaction catalyst, optionally d) at least one monofunctional inert or reactive diluent having a boiling point below 250°C and optionally at least one additive from among: an anti-UV agent, an antioxidant, a pot life extender, and a conductivity additive, the composition having a VOC content < 300 g/l and a reference application viscosity of 450 mPa.s at 25°C. The invention also relates to a crosslinkable composition of polyurethane comprising said composition of polyol resin as constituent A) and a polyisocyanate as constituent B), and to the use thereof in crosslinkable compositions of polyurethane coatings having a VOC content < 250 g/l without affecting the application and use performance levels. |
