The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 18, 1978
Filed:
Aug. 11, 1975
Hans-Gerhard Creutz, Yale, MI (US);
Roy Wilbur Herr, Troy, MI (US);
Richard Marshall Stevenson, Grosse Point Woods, MI (US);
Oxy Metal Industries Corporation, Warren, MI (US);
Abstract
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 characterizes certain prior art baths. The electroplating bath composition of this invention embodies a polyethylenimine having the general empirical formula --[C.sub.2 H.sub.5 N].sub.x --, and a sulfonating 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: ##STR1## where, M = H, Li, Na, K, or, NH.sub.4. The ratio of these nitrogen substituted sulfamate units to amino units, --[CH.sub.2 CH.sub.2 NH]--, in the reaction product is determined by the molar ratio of the polymer repeat unit, --[C.sub.2 H.sub.5 N]--, to sulfonating agent in the reaction.