Polyalkylene glycol naphthyl-3-sulfopropyl diether compounds and their salts, process for preparing same and electroplating baths containing same

US4820388A · kind A · utility

Assignees

• RASCHIG GMBH · DE
• Elektro-Brite GmbH & Co. KG · DE

Inventors

• Werner Kurze · Schifferstadt, DE
• Klaus-Peter Klos · Trebur, DE

Key dates

• Filing date: Jun 13, 1988
• Grant date: Apr 11, 1989
• Expiry date: Jun 13, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D3/565
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Novel Polyalkylenglycol naphthyl-3-sulfopropyl diethers and salts thereof of the formula ##STR1## (R.sub.1 -R.sub.3 =H, C.sub.p H.sub.2p--1 ; p=l--4, A=(PO).sub.m --(EO).sub.n --, (EO).sub.n --(PO).sub.m,--(EO).sub.n EO=ethylenoxide residue, PO=propylenoxide residue, m=0-15, n-1-40, A=H, alkali metal, earth alkali metal, NR.sub.5 R.sub.6 R.sub.7 R.sub.8 wherein R.sub.5 -R.sub.8 =H, C.sub.1 -C.sub.4 --alkyl, aryl, aralkyl) are prepared by reacting the corresponding polyalkylene glycol naphthyl either with propane-1.3-sultone. The compounds are surfactants in particular in electroplating baths for precipitation Zn, Sn, Cu, Ag, Ni and alloys thereof.