Cleaning and surface conditioning of formed metal surfaces

Details Cleaning and surface conditioning of formed metal surfaces Cleaning and surface conditioning of formed metal surfaces

C - Chemistry, Metallurgy

23

G

C23G 1/12 (2006.01) C11D 3/02 (2006.01) C11D 11/00 (2006.01) C23F 11/04 (2006.01) C23G 1/04 (2006.01)

Patent

CA 2208429

A lubricant and surface conditioner for formed metal surfaces, particularly beverage containers, reduces the coefficient of static friction of said metal surfaces and enables drying said metal surfaces at a lower temperature. An aqueous composition for forming the conditioner by contact with metal surfaces includes a water-soluble organic material selected from a phosphate ester, alcohol, fatty acid including mono-, di-, tri-, and polyacids; fatty acid derivatives such as salts, hydroxy acids, amides, esters, ethers and derivatives thereof; and mixtures thereof and at least one of the elements selected from zirconium, titanium, cerium, aluminum, iron, tin, vanadium, tantalum, niobium, molybdenum, tungsten, and hafnium in metallic or ionic form. In order to avoid formation of sludge in the aqueous lubricant and surface conditioner forming composition, the composition should contain as little as possible of materials containing phenanthrene rings, such as conventional surfactants made by ethoxylating resin. In order to assure the minimization of such surfactants in the aqueous lubricant and surface conditioner forming composition, surfactants containing phenanthrene rings should also be avoided or minimized in earlier cleaning stages.

Lubrifiant et agent de traitement de surfaces façonnées en métal, telles que des boîtes métalliques pour boissons, permettant de diminuer le coefficient de friction statique desdites surfaces et de sécher lesdites surfaces à une température inférieure. Une composition aqueuse, destinée à former l'agent de traitement par contact avec ces surfaces métalliques, comprend un matériau organique soluble dans l'eau sélectionné parmi un ester de phosphate, un alcool, un acide gras incluant des mono-, di-, tri- et polyacides, des dérivés d'acide gras, tels que des sels, des acides hydroxy, des amides, des esters, des éthers et leurs dérivés, ainsi que leurs mélanges et au moins un des éléments sélectionnés parmi zirconium, titane, cérium, aluminium, fer, étain, vanadium, tantale, niobium, molybdène, tungstène et hafnium sous forme ionique ou métallique. Afin d'éviter la formation de pâte épaisse dans ladite composition, il est préférable qu'elle contienne une quantité minimum de matériaux comportant des noyaux de phénanthrène, tels que des tensioactifs classiques préparés par éthoxylation de résine. Il est préférable d'éviter l'utilisation de ces tensioactifs ou de la limiter au maximum pendant les premières étapes de nettoyage, afin de réduire leur quantité au minimum dans la composition aqueuse de préparation du lubrifiant et de l'agent de traitement de surface.

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