| abstract |
Novel Polyalkylenglycol naphthyl-3-sulfopropyl diethers and salts thereof of the formula <IMAGE> (R1-R3=H, CpH2p-1; p=l-4, A=(PO)m-(EO)n-, (EO)n-(PO)m,-(EO)n EO=ethylenoxide residue, PO=propylenoxide residue, m=0-15, n-1-40, A=H, alkali metal, earth alkali metal, NR5R6R7R8 wherein R5-R8=H, C1-C4-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. |