WELDABLE PRE-PRIMED COATING COMPOSITION FOR AUTOMOTIVE OEM AND COATING METHOD THEREOF
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United States of America Patent
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Issued Date -
Dec 22, 2011
app pub date -
Jul 26, 2010
filing date -
Jun 21, 2010
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a weldable pre-primed coating composition, comprising binder resins, a crosslinker, an anti-corrosive pigment, conductive metal powder, carbon nanotubes, etc. The coating composition can be applied to a metal sheet before processing of the metal sheet to maximize the weldability, adhesion, corrosion resistance and processability of the metal sheet. Also, the coating composition can be applied to a metal sheet by a roll coating process to make it possible to eliminate not only an existing electrodeposition process which is carried out by a non-environmentally-friendly wet dipping process, but also an existing electrostatic spray primer coating process which is carried out by an electrostatic spray coating process in which a solvent is scattered, whereby the metal sheet coated with the coating composition has very excellent formability and weldability after its processing. Accordingly, the composition makes it possible to reduce the number of complex automotive coating processes, thereby greatly contributing an increase in productivity, a reduction in energy and an improvement in a work environment.
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