C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/07 (2006.01) C23C 22/12 (2006.01) C23C 22/17 (2006.01)
Patent
CA 2657124
Method of passivating metallic surfaces and a preparation which is suitable for carrying out the method and comprises at least water, an acid and a copolymer of functionalized (meth)acrylic esters, monomers having phosphoric acid and/or phosphonic acid groups, monomers having COOH groups and, if desired, further monomers. Copolymer containing the monomers mentioned.
L'invention concerne un procédé de passivation de surfaces métalliques avec une composition copolymère comportant des groupements acide phosphorique et/ou acide phosphonique. L'invention concerne également une composition appropriée à une utilisation dans ce procédé, ladite composition comprenant de l'eau, un acide et un copolymère d'esters d'acide (méth)acrylique fonctionnalisés, de monomères comportant des groupements acide phosphorique et/ou acide phosphonique, de monomères comportant des groupements COOH et éventuellement d'autres monomères. L'invention concerne également un copolymère contenant lesdits monomères.
Bertkau Walter
Fehringer Dietrich
Goethlich Alexander
Heidenfelder Thomas
Klippel Frank
Basf Se
Robic
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