Two-component coating compositions

摘要

The present invention describes two-component coating compositions which for curing require no polyisocyanates or melamine-formaldehyde resins as crosslinkers.

主权项

1. A two-component coating composition comprising
at least one copolymer (A) which carries at least one cyclic carbonate group, an amine component (B) comprising at least two amines which are diamines, polyamines, or a mixture thereof, where each of the amines has at least two amine groups selected from the group consisting of primary and secondary amine groups, at least one solvent (C) in which the components (A) and (B) are soluble, optionally at least one pigment (D), and optionally at least one additive (E), wherein the amine component has a fraction of tertiary amine groups, based on the total amount of primary, secondary, and tertiary amine groups, of less than 20%; the molar ratio of primary and secondary amino groups in (B) to cyclic carbonate groups in (A) is from 1.2:1 to 1:5; and the copolymer (A) is obtainable by radical polymerization of a monomer mixture comprising (a1) at least one (meth)acrylate containing at least one cyclic carbonate group, (a2) at least one additional (cyclo)alkyl (meth)acrylate, (a3) at least one vinylaromatic monomer, (a4) optionally at least one hydroxyalkyl (meth)acrylate, and (a5) optionally at least one acid-group-containing monomer.