| 摘要 |
The invention relates to an aqueous coating agent containing at least one aqueous dispersion containing at least one mixed polymerisate (MP). The mixed polymerisate (MP) can be produced by (i) providing an aqueous dispersion of at least one polyurethane and then (ii) polymerizing a mixture of olefinically unsaturated monomers in the presence of the polyurethane from (i), wherein (a) a water-soluble initiator is used, (b) the olefinically unsaturated monomer is metered such that a concentration of 6.0 wt.%, based on the total quantity of olefinically unsaturated monomers used for the polymerization, in the reaction solution is not exceeded over the entire duration of the reaction, and (c) the mixture of the olefinically unsaturated monomers contains at least one multi-olefinically unsaturated monomer and at least one linear hydroxyl functional reaction product (R) with an acid value of less than 20 mg KOH/g, at least one compound (v) containing two functional groups (v.a) and an aliphatic or aryl aliphatic hydrocarbon group (v.b) with 12 to 70 carbon atoms being used in the production of said reaction product. The invention also relates to a method for producing a multilayer paint using the coating agent and to the multilayer coating produced in this manner. |
