| 摘要 |
<p>The present invention relates to two-part polyurethane compositions. This two-part composition consists of a first pack ( C1 ) and a second pack ( C2 ). The first pack ( C1 ) comprises at least one hyperbranched copolymer ( HBC ) having pending OH groups and which is prepared from at least one or more monomer(s) ( M2 ) having at least two unsaturated C-C bonds and one or more monomer(s) ( MH ) having one unsaturated C-C bonds and one hydroxyl group in the presence of a cobalt (II) complex ( CC ). The second pack ( C2 ) comprises at least one polyisocyanate ( PI ). It has been possible to offer a two-part polyurethane composition which has low viscosity, long pot life, fast cure, excellent weathering and UV resistance and is particularly suitable for the use as coating.</p> |
