| 摘要 |
<p>The invention provides coating compositions having improved adhesion to substrates, especially aluminum substrates. The compositions of the invention are two-component coating compositions having a binder component (I) and a hardener component (II). Binder component (I) has at least one active hydrogen containing compound. Hardener component (II) has an isocyanate functional compound (A), and a silane oligomer (B). Silane oligomer (B) is the reaction product of isocyanate functional compound (A) and a coupling agent (X) comprising (i) at least one alkoxysilane functional group, and (ii) at least one isocyanate reactive group selected from the group consisting of thiol groups secondary amine groups, primary amine groups and mixtures thereof. The silane oligomer (B) comprises at least two free isocyanate groups.</p> |
