Chemistry: electrical and wave energy – Processes and products
Patent
1988-02-17
1989-07-04
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
204 53, 204 541, 204DIG2, C25D 332, C25D 336, C25D 356, C25D 360
Patent
active
048447803
ABSTRACT:
The brightener for an aqueous tin, lead or tin-lead alloy plating bath comprises an effective amount of a primary brightening agent including glutaraldehyde, an effective amount of a secondary brightening agent selected from the group consisting of lower aliphatic and aromatic aldehydes, surface active and levelling agents for the entire range of current densities of from about 20 amperes per square foot to about 250 amperes per square foot, a stabilizing and deoxidizing agents including N.N..sup.1 -di-sec-butyl-p-phenylenediamine, and an organic solvent.
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Kaplan G. L.
Maclee Chemical Company, Inc.
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