JP2011509184A5 - - Google Patents

Description

The present invention provides a coated article comprising a metal surface, a first layer of an uncured autodeposition coating, and a second uncured coating layer deposited continuously on the surface without intermediate curing of the autodeposition coating, A method of co-curing the autodeposition coating and the paint layer or layer group (CO-CURE PROCESS), a cured autodeposition coating layer, and a cured paint layer immediately adjacent to at least the cured autodeposition coating layer The present invention relates to a cured coated article having a chemical bond between the two.
The coated articles and methods are useful for the production of corrosion resistant coated articles having a metal surface.
One advantage of the present invention is the reduction in the number of steps, floor area, time, energy required to produce a corrosion resistant coating, and in some embodiments, an autodeposition coating and paint layer that improves adhesion. It is a chemical bond.

The purpose of the present invention is to
a) a substrate having at least one metal surface with sufficient time and sufficient for an autodeposition bath at a pH between about 1 and about 4 and an uncured autodeposition coating to deposit on the surface; Contact at temperature;
b) washing with water;
c) optionally contacting the uncured autodeposition coating with an alkaline or acidic detergent;
d) if necessary, dehydrating the uncured autodeposition coating;
e) depositing an uncured coating layer on the uncured autodeposition coating;
f) co-curing the uncured autodeposition coating and the uncured paint layer;
Comprising, by providing a co-curing (co-curing) process of autodeposition coating and paint layer, it satisfies the needs mentioned above, and is to overcome at least some of the disadvantages of the prior art.

Another object of the present invention is to have a metal surface, a first layer containing an uncured autodeposition coating, and a second layer containing an uncured coating different from the first layer. The purpose of the present invention is to provide a coated article in which the layer and the second layer are continuously deposited.

Yet another object of the present invention is to deposit a metal surface, a first layer comprising an uncured autodeposition coating deposited on the metal surface, and a surface of the uncured autodeposition coating without intermediate curing. Another object of the present invention is to provide a coated article having a second layer including an uncured coating layer, which is different from the first layer.
Still another object is to provide the coated product in which the first layer is dehydrated prior to the deposition of the second layer.
In one embodiment, the second layer is a powder coating layer. In this embodiment, the first layer can be dehydrated prior to deposition of the powder coating layer.

Yet another object of the present invention is to
a) a substrate having at least one active metal surface,
1) at least 1.0% of the component of the film-forming polymer molecule dissolved, dispersed or dissolved and dispersed based on the autodeposition liquid composition, preferably the film-forming polymer molecule is acrylic System, polyvinyl chloride, epoxy, polyurethane, phenol-formaldehyde condensation polymer, epoxy-acrylic hybrid polymer, or copolymer, and mixtures thereof;
2) optionally at least one emulsifier;
3) Optionally, at least one crosslinker;
4) at least one dissolved accelerator component selected from the group consisting of acids, oxidizing agents, and complexing agents that are not part of component (1), (2) or (3) just listed, The accelerator component is of sufficient strength and quantity to provide an oxidation-reduction potential that oxidizes at least 100 mV above the standard hydrogen electrode over the entire autodeposited liquid composition;
A self-deposition bath having a pH in the range of about 1 to about 4 and a sufficient time and sufficient for the uncured self-deposition coating to deposit on the at least one active metal surface. Contact at various temperatures;
b) washing with water;
c) optionally contacting the uncured autodeposition coating with an alkaline or acidic detergent;
d) if necessary, dehydrating the uncured autodeposition coating;
e) depositing an uncured coating layer on the uncured autodeposition coating; and
f) co-curing the uncured autodeposition coating and the uncured paint layer;
It includes is to provide a method of processing an article comprising a substrate having at least one active metal surface.

The object of the present invention was also deposited on the surface of a metal surface, a first layer comprising an uncured autodeposition coating deposited on the metal surface, and the uncured autodeposition coating without intermediate curing. An object of the present invention is to provide a coated article having a second layer including an uncured coating layer, which is different from the first layer.

a) a substrate having at least one metal surface with sufficient time and sufficient for an autodeposition bath at a pH between about 1 and about 4 and an uncured autodeposition coating to deposit on the surface; A typical autodeposition bath, contacted at temperature, is used to deposit an uncured autodeposition coating, such as ambient temperature, for example 10-38 ° C, preferably 15-30 ° C, more preferably 20-30. Maintained at ℃;
b) washing with water;
c) optionally contacting the uncured autodeposition coating with an alkaline or acidic detergent;
d) if necessary, dehydrating the uncured autodeposition coating;
e) depositing an uncured coating layer on the uncured autodeposition coating; and
f) co-curing the uncured autodeposition coating and the uncured paint layer;
Comprising a method for co-curing the autodeposition coating and paint layer (co-curing) of the present invention are provided herein.