METHOD FOR PRODUCING A COLOUR AND/OR EFFECT-PRODUCING MULTI-LAYERED COATING

摘要

A method for producing a multicoat color and/or effect paint system comprising a pigmented aqueous basecoat material comprising at least one polyurethane resin (A) as binder, at least one color and/or effect pigment, and 0.05% to 10% by weight, based on the total amount of the pigmented aqueous basecoat material, of an associative thickener (B) different from the polyurethane resin (A), the associative thickener (B) being composed of at least one compound of the following formula (I):;with n=0 to 50,where R=;with m=0 to 10,where R1═H or R2,where R2=;with o=0 to 50,with the proviso that for not more than 50% by weight of the compounds of the formula (I), m=0 and R1═H.

主权项

1. A method for producing a multicoat color and/or effect paint system comprising
(1) applying to a substrate a pigmented aqueous basecoat material comprising at least one polyurethane resin (A) as binder and at least one color and/or effect pigment, (2) forming a polymer film from the basecoat material applied in stage (1) to produce a basecoat film, (3) applying a clearcoat material to the basecoat film, and then (4) curing the basecoat film together with the clearcoat material applied in stage (3),wherein the pigmented aqueous basecoat material applied in stage (1) comprises 0.05% to 10% by weight, based on the total amount of the pigmented aqueous basecoat material, of an associative thickener (B) different from the polyurethane resin (A), the associative thickener (B) being composed of at least one compound of the following formula (I):with n=0 to 50,where R=with m=0 to 10,where R1═H or R2,where R2=with o=0 to 50,with the proviso that for not more than 50% by weight of the compounds of the formula (I), m=0 and R1═H.