Pre-conversion coating composition
a technology of coating composition and conversion, applied in the field of coating composition, can solve the problems of environmental conditions, panel corrosion,
Inactive Publication Date: 2010-12-16
PPG IND OHIO INC
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- Application Information
AI Technical Summary
Benefits of technology
The present invention is about a coating composition that includes a corrosion inhibitor and calcium phosphate. This invention also includes a method for coating a substrate with this composition. The technical effect of this invention is to provide a coating that can protect the substrate from corrosion and other environmental factors that can cause damage. The coating can be applied in two layers, with the first layer containing the corrosion inhibitor and the reaction product of a calcium compound with an acid compound, and the second layer containing either the first layer or a new coating applied on top of the first layer. The method involves dehydrating the first layer and optionally rinsing the substrate before applying the second layer. This invention provides a durable and effective coating that can be used in various applications where protection from corrosion is needed.
Problems solved by technology
Traditionally, these components are not coated with any type of protective coating composition and are, therefore, susceptible to environmental conditions.
Accordingly, these panels often exhibit corrosion in the form of black spots.
Method used
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Experimental program
Comparison scheme
Effect test
examples
[0048]Pre-phosphate coating compositions Examples 1 to 4 (below) were prepared from the materials listed in Table 1. Each coating was prepared by charging component 1 to 9 sequentially into a glass beaker under stirring. The components were added one at a time and stirred to be dissolved or mixed uniformly until the next component was added. The final coating products are clear to partly hazy solutions.
TABLE 1Formula Weight (g)ComponentCoatingCoatingNo.Description1Coating 2Coating 341Deionized water88.6887.488.182.70225% Fluorosilicic acid2.221.8—2.103Calcium Nitrate———2.90Calcium phosphate4.434.434.30—485% Phosphoric acid—3.702.105.50560% Fluorotitanic acid3.90—3.803.606Ferric nitrate0.530.301.510.507HEUCOPHOS———2.00ZAMPLUS18Sodium Gluconate0.23—0.200.509Xanthan Gum———0.20Total100.00100.0100.0100.001Anticorrosion additive, received from HEUBACH GmbH, Germany.
Stability Testing
[0049]The coating solutions were stored in polyethylene containers at room temperature overnight and the app...
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Abstract
The present invention is directed to a coating composition comprising (i) a corrosion inhibitor and the (ii) reaction product of a calcium compound with an acid compound. The coating composition is deposited onto a substrate prior to the application of a pre-treatment coating composition (conversion coating) onto the substrate. The present invention is also directed to a substrate that comprises a coating system that comprises such a coating composition.
Description
BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a coating composition that is applied onto a substrate prior to the application of a pretreatment coating composition.[0003]2. Background Information[0004]In the automobile industry, vehicular components, such as vehicular body panels, are often stamped from sheets of metal and shipped to facilities around the world in order to be assembled into an automotive vehicle. Traditionally, these components are not coated with any type of protective coating composition and are, therefore, susceptible to environmental conditions. Accordingly, these panels often exhibit corrosion in the form of black spots.SUMMARY OF THE INVENTION[0005]The present invention is directed to a coating composition comprising (i) a corrosion inhibitor and (ii) calcium phosphate. The present invention is also directed to a substrate that comprises a coating system that comprises such a coating composition.[0006]The pres...
Claims
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Patent Timeline
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IPC IPC(8): B32B19/00C09D1/00B05D3/00
CPCC09D1/00C09D5/084C23C22/361C23C22/362C23C22/367C23F11/188
Inventor STALKER, JEFFREY L.CHENG, SHANKAYLO, ALAN J.
Owner PPG IND OHIO INC