CROSSLINKABLE COMPOSITION CROSS-LINKABLE BY REAL MICHAEL ADDITION REACTION AND RESINS FOR USE IN SAID COMPOSITION

摘要

An RMA crosslinkable composition having at least one crosslinkable component including reactive components A and B each including at least 2 reactive groups, the at least 2 reactive groups of component A being acidic protons (C—H) in activated methylene or methine groups and the at least 2 reactive groups of component B are activated unsaturated groups (C═C) and a base catalyst (C) which reactive components A and B crosslink by Real Michael Addition (RMA) reaction under action of the base catalyst, characterised in that the at least one crosslinkable component including reactive components A and B in the composition have a total hydroxy number of less than 60, preferably less than 40 and more preferably less than 20 mg KOH/g solids. Further, specific resins A and B having a low hydroxy number for use in RMA cross-linkable compositions and a process for the manufacture thereof.

主权项

1) An RMA crosslinkable composition comprising at least one crosslinkable component comprising reactive components A and B each comprising at least 2 reactive groups, wherein the at least 2 reactive groups of component A are C—H acidic protons in activated methylene or methine groups, and the at least 2 reactive groups of component B are C═C activated unsaturated groups and a base catalyst C, which reactive components A and B crosslink by Real Michael Addition reaction under action of the base catalyst, wherein the at least one crosslinkable component comprising reactive components A and B in the composition has a total hydroxy number of less than 60 mg KOH/g solids.