Chemistry: electrical and wave energy – Processes and products
Patent
1978-04-05
1979-02-13
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
204 53, 204 54R, 204DIG2, 544406, 544410, 548335, 548341, 548343, C25D 332, C25D 336, C25D 360, C07D20700
Patent
active
041394259
ABSTRACT:
A composition is described which is useful particularly in improving the electrodeposition of tin, lead or tin-lead from an aqueous acidic plating bath. The new composition comprises a reaction product of an unsaturated nitrogen-containing heterocyclic compound with a mixture comprising formaldehyde and an unsaturated aliphatic aldehyde containing up to about six carbon atoms. Aqueous acidic plating baths containing the additive compositions of the invention, and methods for depositing tin, lead or tin-lead alloys from such baths as well as additive compositions for forming the baths also are described.
REFERENCES:
patent: 3361652 (1968-01-01), Korpiun et al.
patent: 3850765 (1974-11-01), Karustis et al.
Eckles William E.
Willis William J.
Kaplan G. L.
R. O. Hull & Company, Inc.
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