Back to results
US 2018/0200757 A1Published application
Method for producing a coating consisting of surfacer and topcoat
AssigneeBASF Coatings GmbH
InventorsBernd MAYER, Andreas HANNING, Meinolf SENDKER, Carsten VIETZE, Reinhard WIESING
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method for producing a coating consisting of a cured surfacer coat and topcoat on a substrate, and also to a substrate coated by the method of the invention. The substrate preferably comprises the body or the cabin of a motor vehicle, or a constituent thereof. The method of the invention is suitable especially for producing coatings on automobiles and commercial vehicles, such as trucks, vans, or buses.
Claims13
1:
- A method for producing a coating, consisting of a cured surfacer coat and a cured topcoat, on a substrate, the method comprising:
- first applying a first coating material to an untreated substrate or a substrate coated at least with a cured electrodeposition coat, thereby forming a surfacer coat, wherein the first coating material comprises a coloring pigment and a self-crosslinking, externally crosslinking, or physically drying binder as a main binder, and
- second applying a second coating material to the surfacer coat, thereby forming a topcoat, wherein the second coating material comprises a coloring pigment and a self-crosslinking, externally crosslinking, or physically drying binder as a main binder,
- wherein the coating system produced in the first applying is cured to form the coating,
- the first and second coating materials used in the coating system are compatible according to DIN EN ISO 12944-5:2008-01, and
- the second applying takes place before the first coating material has reached drying stage 1 according to DIN 53150:2002-09, the drying stage being determined according to EN ISO 9117-3:2010.
3 more elements
2:
- The method of claim 1, wherein the main binder of the first coating material and the main binder of the second coating material are compatible according to DIN EN ISO 12944-5:2008-01.
3:
- The method of claim 1, wherein the main binder of the fi coating material and the main binder of the second coating material belong to the same binder class.
4:
- The method of claim 1, wherein the main binder of the first coating material and the main binder of the second coating material are identical.
5:
- The method of claim 1, wherein the first and second coating materials, dependently on one another, either comprise, as solvents, substantially organic solvents or are substantially aqueous.
6:
- The method as claimed in claim 5, wherein the first and second coating materials comprise, as solvents, substantially organic solvents.
7:
- The method of claim 1, wherein both the main binders and the solvents of the first and second coating materials for forming the surfacer coat and the topcoat are identical.
8:
- The method of claim 1, wherein the main binder of the first and second coating materials is at least one selected from the group consisting of an isocyanate-crosslinking, polyhydroxyl group-containing polyester and a polyacrylate resin.
9:
- The method of claim 1, wherein the first and second coating materials have a solids fraction of at least 40 wt %.
10:
- The method of claim 1, wherein the first coating material and the second coating material are applied by pneumatic spraying and/or electrostatic spraying.
11:
- The method of claim 1, wherein the first and second coating materials are each applied with a wet film thickness such that a dry film thickness of the cured surfacer coat is 25 to 35 μm and a dry film thickness of the cured topcoat is 40 to 80 μm.
12:
- The method of claim 1, wherein the substrate is a body of a motor vehicle or a part of the body of the motor vehicle.
13:
- A substrate coated with a coating consisting of a cured surfacer coat and a cured topcoat, produced by the method of claim 1.