C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/34 (2006.01) C23C 22/36 (2006.01)
Patent
CA 2205996
An aqueous acid solution is used for treating beverage cans, in particular made of aluminium, in order to create on the cans an anti-corrosive, friction- reducing coating that allows the cans to be more easily lacquered. The solution contains 0.14 to 2.25 mmol/l of an alkyl amine oxide or alkyl ammonium salt with an alkyl residue having 8 to 22 C atoms, 0.25 to 1.5 mmol/l hydroxycarboxylic acids with 4 to 7 C atoms, complex fluorides and mineral acids, and preferably tannin.
On utilise une solution acide aqueuse pour traiter des boîtes de boisson, notamment en aluminium, et pour former sur celles-ci un revêtement anticorrosion et réduisant le frottement, qui permet de laquer les boîtes plus facilement. La solution acide aqueuse contient 0,14 à 2,25mmol/l d'un oxyde d'alkylamine ou d'un sel d'alkylammonium avec un reste alkyle ayant entre 8 et 22 atomes de carbone, 0,25 à 2,5 mmol/l d'acides hydroxycarboxyliques ayant entre 4 et 7 atomes de carbone, des fluorures complexes et des acides minéraux, et de préférence du tanin.
Henkel Kommanditgesellschaft Auf Aktien
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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