Process for producing a multilayer, protective and/or...

Details Process for producing a multilayer, protective and/or... Process for producing a multilayer, protective and/or...

B - Operations, Transporting

05

D

B05D 1/36 (2006.01) B05D 7/00 (2006.01) C08G 18/08 (2006.01) C08G 18/76 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2105294

The invention relates to a process for the production of multicoat finishes, in which (1) an aqueous pigmented basecoat containing a water-thinnable polyurethane resin is applied to the substrate surface as basecoat, (2) a polymer film is formed from the coating applied in stage (1), (3) a transparent topcoat is applied to the basecoat obtained in this way and subsequently (4) the basecoat is baked together with the topcoat, and the water-thinnable polyurethane resin contains structural units of the formula Image X representing a divalent aromatic hydrocarbon radical and R1 and R2 representing an alkyl radical having 1 to 4 carbon atoms.

La présente invention concerne un procédé pour la production de finis multicouche dans lequel 1) une couche de fond pigmentée aqueuse contenant une résine de polyuréthane diluable à l'eau est appliquée sur la surface du substrat comme couche de fond, 2) un film polymérique est formé à partir du revêtement appliqué à l'étape 1), 3) une couche de finition transparente est appliquée sur la couche de fond obtenue de cette façon et, par la suite, 4) la couche de fond est cuite avec la couche de finition, et la résine de polyuréthane diluable à l'eau contient des motifs structuraux de formule Image où X représente un radical hydrocarboné aromatique divalent et R1 et R2 représentent un radical alkyle de 1 à 4 atomes de carbone.

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