EP 0492487 B1 19960320 - Means of temporary protection of bare silver and copper surfaces against tarnishing and method of using it
Title (en)
Means of temporary protection of bare silver and copper surfaces against tarnishing and method of using it
Title (de)
Mittel zum zeitweiligen Schutz von blanken Silber- und Kupferoberflächen gegen Anlaufen und Verfahren zu seiner Anwendung
Title (fr)
Produit de protection temporaire de surfaces nues en argent et en cuivre contre le ternissement et procédé d'utilisation
Publication
Application
Priority
- DE 4041596 A 19901222
- DE 4124955 A 19910727
Abstract (en)
[origin: EP0492487A1] The means of temporary protection of bare silver surfaces or silver-alloy surfaces against tarnishing contains, as hydrophobic inhibitor, a long-chain aliphatic compound having at least 12 carbon atoms in the chain, namely a thiol or an esterification product thereof, water and a water-soluble emulsifier used to emulsify the inhibitor in the water, and it is adjusted to a pH of 1 to 10. The means is also suitable for passivating surfaces made of copper and copper alloys.
IPC 1-7
IPC 8 full level
C23F 11/16 (2006.01)
CPC (source: EP)
C23F 11/161 (2013.01)
Designated contracting state (EPC)
DE ES FR GB IT NL
DOCDB simple family (publication)
EP 0492487 A1 19920701; EP 0492487 B1 19960320; DE 59107581 D1 19960425; ES 2086471 T3 19960701
DOCDB simple family (application)
EP 91121903 A 19911220; DE 59107581 T 19911220; ES 91121903 T 19911220