C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
117/90.1, 204/18
C25D 5/56 (2006.01) C23C 18/24 (2006.01) H05K 1/03 (2006.01) H05K 3/18 (2006.01) H05K 3/38 (2006.01)
Patent
CA 1227767
ABSTRACT OF THE DISCLOSURE The pretreating of thermoplastic substrates containing carbonamide groups and an inorganic, fine-particulate adhesion filler, is improved to produce strongly adhering metal coatings thereon, by combining the following steps: the pickling is divided in at least two partial steps, where the first partial step comprises predipping in a pickling solution such as 50 to 96% sulfuric acid where the surface tension is lowered to at most 25 mN/m at 20°C, and the pretreated plastic is dried at 70 to 110°C before the actual galvanic metal deposition.
436691
Bertels Herbert
Gatzschmann Horst
Hafner Hubertus
Schmid Alfred
Chemische Werke Huls Aktiengesellschaft
Degussa-Huls Aktiengesellschaft
Fetherstonhaugh & Co.
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