Method for electroplating elastomer-modified polyphthalamide articles
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United States of America Patent
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Jul 27, 1999
Issued Date -
N/A
app pub date -
Aug 8, 1997
filing date -
Jun 2, 1997
priority date (Note) -
Expired
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Abstract
A process for metal plating a high impact, high temperature plastic suitable for forming trim elements of an automobile. The process is particularly directed to plating an elastomer-modified PPA resin, and entails closely controlled process steps that include selectively etching the elastomer and the PPA matrix with a solution containing chromic acid, then effectively removing from the substrate any retained chromium which would adversely affect the ability of metal plating to adhere to the substrate, and thereafter protecting the substrate from attack by sulfuric acid. The process is particularly effective for electroplating a PPA resin modified with about five to about 30 weight percent elastomeric materials.
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