C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
204/28, 402/320,
C25D 3/00 (2006.01) C07C 143/86 (1980.01)
Patent
CA 1101443
ABSTRACT OF THE DISCLOSURE The instant invention is directed to an Aqueous bath for the electrodeposition of bright metal deposits, and more particularly to a bath composition which provides upon the basis metal an electrodeposit having improved brightness, particularly in low current density areas, and as well, a condition of ductility markedly better than that which charac- terizes certain prior art baths. The electroplating bath composition of this invention embodies a polyethylenimine having the general empirical formula -[C2H5N]X-, and a sulfo- nating agent for the polyethylenimine, whereby there is obtained a reaction product which contains nitrogen substituted sulfamate groups as an integral part of the polymer chain. The nitrogen substituted sulfamate unit of the reaction product is represented by the formula: Image where, M - H, Li, Na, K, or, NH4. The ratio of these nitrogen substituted sulfamate units to amino units, -[CH2CH2NH]-, in the reaction product is determined by the molar ratio of the polymer repeat unit, -[C2H5N]-, to sulfonating agent in the reaction.
290429
Creutz Hans-Gerhard
Herr Roy W.
Stevenson Richard M.
Creutz Hans-Gerhard
Herr Roy W.
Stevenson Richard M.
Swabey Ogilvy Renault
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