C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 49/248 (2006.01) C07C 45/46 (2006.01) C07C 45/64 (2006.01) C07C 45/72 (2006.01) C07C 47/57 (2006.01) C07C 49/255 (2006.01) C07C 49/83 (2006.01) C07C 49/84 (2006.01) C07C 69/738 (2006.01) C07C 235/78 (2006.01) C07C 255/41 (2006.01) C07C 255/44 (2006.01) C07D 311/08 (2006.01) C07D 311/16 (2006.01) C25D 3/02 (2006.01) C25D 3/22 (2006.01)
Patent
CA 2208723
The present invention pertains to salts of aromatic hydroxyl compounds of the general formulas (I and II), wherein m, n, R1, R2, R3, R6, R7, R8 and Ar are as indicated in the description and X is an alkali metal, alkaline earth metal atom or an amonium radical, and to their use as brighteners in acid electroplating baths. The invention also pertains to acid electroplating baths used for electrolytic deposition of metallic layers on shaped parts, the baths comprising as brightener at least one of the claimed salts of an aromatic hydroxyl compound. Finally, the invention pertains to a method of electrodeposition coating of shaped parts using the claimed acid electroplating baths.
L'invention concerne des sels de composés hydroxyles aromatiques de formule générale (I) et (II) où m, n, R?1¿, R?2¿, R?3¿, R?6¿, R?7¿, R?8¿ et Ar ont la notation mentionnée dans la description, et X représente un métal alcalin, un atome de métal alcalinoterreux ou un radical ammonium. L'invention concerne également leur utilisation comme lustrants dans des bains acides de galvanisation, et des bains acides de galvanisation servant à l'électrodéposition de couches métalliques sur des pièces façonnées. Les bains de galvanisation contiennent comme lustrant au moins un sel décrit d'un composé hydroxyle aromatique. L'invention concerne en outre un procédé de revêtement par galvanisation de telles pièces dans ces bains acides de galvanisation.
Oftring Alfred
Schroder Ulrich
Wehlage Thomas
Basf Aktiengesellschaft
Borden Ladner Gervais Llp
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