发明公开
- 专利标题： Plating bath and method for electroplating tin and/or lead
- 专利标题（中）： 电镀锌和/或铅的镀锌浴和方法
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申请号： EP86302269申请日： 1986-03-26
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公开(公告)号： EP0196232A3公开(公告)日： 1987-04-01
- 发明人: Opaskar, Vincent C , Canaris, Valerie M. , Willis, William J.
- 申请人： MCGEAN-ROHCO, INC.
- 专利权人： MCGEAN-ROHCO, INC.
- 当前专利权人： MCGEAN-ROHCO, INC.
- 优先权： US716260 19850326
- 主分类号： C25D03/32
- IPC分类号： C25D03/32 ; C25D03/60 ; C25D03/34 ; C25D03/56
摘要：
A tin and/or lead electroplating bath is free from fluoride or fluoborate ions and comprises
(A) a bath-soluble metal salt which is a stannous salt, a lead salt, or a mixture of stannous and lead salts; (B) an alkane sulphonic acid or alkanol sulphonic acid; (C) a nonionic, cationic or amphoteric surfactant; (D) a primary brightening agent which is an aromatic aldehyde, an acetophenone or a carbonyl compound of the formula:
in which Ar is a substituted or unsubstituted phenyl, naphthyl, pyridyl, thiophenyl or furyl group; and (E) a secondary brightening agent which is a lower aliphatic aldehyde or a substituted olefin of the formula:
in which R, is a carboxy, carboxamide, alkali metal car boxylate, ammonium carboxylate, amine carboxylate or allyl carboxylate group; and R 2 , R 3 and R 4 are each independently hydrogen or lower alkyl groups.
(A) a bath-soluble metal salt which is a stannous salt, a lead salt, or a mixture of stannous and lead salts; (B) an alkane sulphonic acid or alkanol sulphonic acid; (C) a nonionic, cationic or amphoteric surfactant; (D) a primary brightening agent which is an aromatic aldehyde, an acetophenone or a carbonyl compound of the formula:
in which Ar is a substituted or unsubstituted phenyl, naphthyl, pyridyl, thiophenyl or furyl group; and (E) a secondary brightening agent which is a lower aliphatic aldehyde or a substituted olefin of the formula:
in which R, is a carboxy, carboxamide, alkali metal car boxylate, ammonium carboxylate, amine carboxylate or allyl carboxylate group; and R 2 , R 3 and R 4 are each independently hydrogen or lower alkyl groups.
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