Additive for electrodeposition of bright tin and tin-lead alloy

Details Additive for electrodeposition of bright tin and tin-lead alloy Additive for electrodeposition of bright tin and tin-lead alloy

1975-03-12

1976-05-11

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204DIG2, 204 43S, 260599, C25D 332, C25D 360

Patent

active

039561232

ABSTRACT:
The invention disclosed herein relates to the electrolytic deposition of bright tin and tin-lead alloy. This invention is embodied in a new plating bath and a plating bath additive. The new plating bath includes tin or tin and lead ions, sulfuric acid or fluoboric acid, and the new additive. The new additive includes an emulsified naphthalene monocarboxaldehyde with or without a substituted olefin, having the general formula: ##EQU1## in which R.sub.1 is carboxy, carboxamido, alkali carboxylate, ammonium carboxylate, amine carboxylate, or alkyl carboxylate, and R.sub.2, R.sub.3, and R.sub.4 are hydrogen, methyl, or lower alkyl.

REFERENCES:
chemical Abstracts, Vol. 52, 17077e, (1958).
Chemical Abstracts, Vol. 72, 50345y, (1970).

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