Method for electroplating elastomer-modified polyphthalamide art

Details Method for electroplating elastomer-modified polyphthalamide art Method for electroplating elastomer-modified polyphthalamide art

1997-06-02

1999-10-05

Talbot, Brian K.

Coating processes

With pretreatment of the base

Preapplied reactant or reaction promoter or hardener

427306, 427307, 427437, 4274431, 205167, 205168, 205187, 205210, B05D 304

Patent

active

059620730

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 EPDM.

REFERENCES:
patent: 3622370 (1971-11-01), D'Ottavio et al.
patent: 3668130 (1972-06-01), Kadison et al.
patent: 4125649 (1978-11-01), Donovan et al.
patent: 4610895 (1986-09-01), Tubergen et al.

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