The present invention relates to a crosslinkable composition comprising at least one crosslinkable component and a latent base crosslinking catalyst, which crosslinkable composition has a solids content of at least 55 wt% (dry weight after crosslinking relative to the total weight of the crosslinking composition) wherein the latent base catalyst is a substituted carbonate salt according to formula 1
wherein X+ represents a cation, preferably a quaternary ammonium or phosphonium, and wherein R is hydrogen, alkyl, aryl or aralkyl group. The invention relates in particular to a composition crosslinkable by Real Michael Addition (RMA) reaction wherein a component with at least 2 activated unsaturated groups and a component with at least 2 acidic protons C-H in activated methylene or methine groups react and crosslink to each other in the presence of a strong base catalyst. The invention further relates to a coating composition comprising the crosslinkable composition according to the invention, a novel catalyst composition and to the use of said catalyst composition according to the invention as a latent base crosslinking catalyst in coating compositions, preferably in RMA crosslinkable compositions.
本发明涉及一种可交联组合物,该组合物包括至少一种可交联组分和一种潜碱交联催化剂,该可交联组合物的固体含量至少为 55 wt%(交联后的干重相对于交联组合物的总重量),其中潜碱催化剂是一种根据式 1 所示的取代
碳酸盐
其中 X+ 代表阳离子,最好是季
铵或
鏻,R 是氢、烷基、芳基或芳烷基。本发明尤其涉及一种可通过真实迈克尔加成(RMA)反应交联的组合物,其中至少有 2 个活化不饱和基团的组分和至少有 2 个酸性质子 C-H 在活化亚甲基或甲基中的组分在强碱催化剂存在下发生反应并相互交联。本发明进一步涉及一种包含根据本发明的可交联组合物、新型催化剂组合物的涂料组合物,以及根据本发明的所述催化剂组合物作为潜碱交联催化剂在涂料组合物中的使用,最好是在 RMA 可交联组合物中的使用。