Aqueous composition for low-temperature metal-cleaning and...

C - Chemistry – Metallurgy – 11 – D

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C11D 1/825 (2006.01) C11D 1/835 (2006.01) C11D 1/86 (2006.01) C11D 3/10 (2006.01) C11D 11/00 (2006.01) C23G 1/14 (2006.01) C11D 1/58 (2006.01) C11D 1/72 (2006.01)

Patent

CA 2245429

An alkaline, aqueous metal-cleaning composition capable of effectively removing industrial-type soil contaminants from a metal surface at temperatures as low as ambient temperature and in the absence of substantial agitation contains (A) an active-ingredient portion containing (1) an alkalinity-providing component, and (2) a surfactant mixture containing: (a) at least one first non-ionic, ethoxylated linear primary alcohol surfactant having a hydrophobic carbon chain length of from 9 to 11 carbon atoms and being ethoxylated with (i) an average of 2.5 moles of ethylene oxide or (ii) an average of 5.0 moles of ethylene oxide; and (b) at least one second non-ionic, ethoxylated linear primary alcohol surfactant having a hydrophobic carbon chain length of from 9 to 11 carbon atoms and being ethoxylated with an average of 6.0 moles of ethylene oxide; and (B) an aqueous portion.

Une composition alcaline, aqueuse pour le nettoyage du métal, capable d'éliminer efficacement les contaminants industriels du sol sur une surface métallique à des températures aussi basses que la température ambiante et sans agitation importante, contient A) un ingrédient actif comportant 1) une composante alcaline et 2) un mélange de surfactants constitué : a) d'au moins un premier surfactant non ionique à base d'alcool primaire linéaire éthoxylé ayant une chaîne carbonée hydrophobe de 9 à 11 atomes de carbone et éthoxylé avec (i) une moyenne de 2,5 moles d'oxyde d'éthylène ou (ii) une moyenne de 5,0 moles d'oxyde d'éthylène; et b) d'au moins un second surfactant non ionique à base d'alcool primaire linéaire éthoxylé ayant une chaîne carbonée hydrophobe de 9 à 11 atomes de carbone et éthoxylé avec une moyenne de 6,0 moles d'oxyde d'éthylène; et B) de l'eau.

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