Coating system for RMA crosslinkable coating compositions
AssigneeAllnex Netherlands B.V.
InventorsFreddy Van Wijk, Marcellinus Meeuwissen, Andrew Teasdale, Bart Noordover
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Abstract
The invention relates to a coating system comprising a binder composition comprising a polymer having a Mn of 6,000 to 60,000 g/mol, a Mw of 20,000 to 300,000 g/mol, a Tg of 30 to 180° C. and an acid value of at most 3.0 mg KOH/g, and a RMA crosslinkable coating composition comprising a component A with at least two acidic protons C—H in activated methylene or methine groups, a component B with at least two activated unsaturated C═C groups and a base crosslinking catalyst C; and its use for improving adhesion of the RMA crosslinkable coating composition, in particular to wood substrates.
Claims16
A coating system for coating substrates, comprising an binder component P comprising at least one polymer PR having a number-average molecular weight (Mn) of 6,000 to 60,000 g/mol, a weight-average molecular weight (Mw) of 20,000 to 300,000 g/mol, a glass transition temperature (Tg) of 30 to 180° C. and an acid value of at most 3.0 mgKOH/g and a RMA crosslinkable composition comprising a component A with at least 2 acidic protons C—H in activated methylene or methine groups, a component B with at least two activated unsaturated C═C groups, with the proviso that component A and component B may be part of the same molecule, a catalyst C for catalyzing the RMA crosslinking reaction between components A and B and optionally a reactivity moderator D.
Dependencies are inferred from the claim text.