| 摘要 |
PURPOSE:To provide uniform platability and brightness to a three-dimensional body to be plated by using a compd. consisting of naphthol added with propylene oxide and ethylene oxide as an additive. CONSTITUTION:>=1 Kinds of the compd. expressed by the general formulas I, II, III are used as the essential component of the additive for electroplating. In the formulas l is 1-10, n is 0-9, l+n=1-10, m is 1-15, x is 0-14, m+x=5-15. These additives are obtd. by adding the propylene oxide to alphaor beta naphthol then adding the ethylene oxide alone or the ethylene oxide and propylene oxide thereto. The uniform platability and brightness are obtd. at a wide effective plating width when such additive is added to an electroplating bath.
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