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Two-tone painting method

A paint and primer technology, applied in the direction of coating, liquid coating device on the surface, pretreatment surface, etc., can solve the problem of unsatisfactory coating appearance and so on

Inactive Publication Date: 2009-11-04
BASF CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been found that omitting the step of curing the primer creates pits in the primer that transfer to the finished painted surface, resulting in an unsatisfactory paint appearance

Method used

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  • Two-tone painting method

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Embodiment Construction

[0009] refer to figure 1 , generally illustrating a method of painting a substrate. The method includes applying a powder primer, a powder primer, and a topcoat to a substrate.

[0010] Although not required, the powder primer is preferably a low density powder primer. Thus, it should be understood that standard powder primers or low density powder primers may be used in accordance with the present invention. A powder primer includes a pigment component and a binder component. These ingredients may have ratios of pigment to binder known in the art. The pigment component has a higher weight per unit volume than the binder component. Thus, when the pigment component is reduced relative to the binder component, the total weight of the powder primer per unit volume is reduced. Thus, low density powder primers comprise a higher binder content relative to pigment content than is normally used in standard powder primers. Typically, low density powder primers have less than 1.4 ...

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Abstract

The present invention discloses a two-tone painting method that includes applying a powder primer to a substrate, followed by a powder basecoat applied dry-on-dry onto the powder primer. The powder basecoat is preferably applied in the same painting booth as the powder primer, i.e., without curing the powder primer. The powder basecoat includes a flake additive, such as a mica flake or a metal flake, which prevents surface irregularities from forming in the powder primer and the powder basecoat as a result of not curing the powder primer before applying the powder basecoat. The substrate is then masked, and a second basecoat is applied. The masking is then removed and a clearcoat is applied. The second basecoat and the clearcoat are then cured simultaneously in an oven.

Description

technical field [0001] The present invention generally relates to a method of painting a substrate. Background technique [0002] Current two-tone painting methods typically involve cleaning the substrate with an iron phosphate wash followed by application and curing of an electrocoat to the substrate. The substrate moves to the first coating chamber where a primer (powder primer or liquid primer) is applied over the electrocoat. The substrate then moves to a first oven where it is baked to cure the primer. After the primer has cured, the substrate moves to the second paint booth where the first basecoat (first color coat) or alternatively the first basecoat and clearcoat are applied. The substrate then moves to a second oven where it is baked to cure the first color coat. Once the first color coat is cured, the substrate is masked to define a first portion and a second portion, the mask covering one of the first portion and the second portion. After the substrate is mas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/08B05D7/00B05D1/32B05D7/14
CPCB05D5/065B05D7/14B05D2601/02B05D7/577B05D1/32B05D2451/00B05D3/0254B05D2601/04B05D2401/32
Inventor C·A·斯坦斯T·C·鲍尔奇
Owner BASF CORP
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