Cleaning solution for cleaning metal surfaces
AssigneeAtotech Deutschland GmbH
InventorsEckart Klusmann, Janos Hantschick
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Abstract
Cleaning solution for cleaning and/or wetting metal surfaces, comprising at least one acid, a first surfactant, which is an alkyl-poly(ethyleneglycol-co-propyleneglycol)-ether having a cloud point of ≤25° C., a second surfactant, which is selected from the group consisting of i) an alkyl-poly(ethyleneglycol-co-propyleneglycol)-ether having a cloud point of ≥30° C., ii) an alkyl-polyethyleneglycol-ether having a cloud point of ≥45° C. wherein the cloud points are determined according to European Standard EN 1890:2006, item 8.2 of German Version, with the modification that 10 wt % H2SO4 is used as solvent and that the concentration of the surfactant is 1000 mg/L.
Claims9
Cleaning solution for cleaning and/or wetting metal surfaces, comprising
- at least one acid,
- a first surfactant, which is an alkyl-poly(ethyleneglycol-co-propyleneglycol)-ether having a cloud point of ≤25° C., and
- a second surfactant, which is selected from the group consisting of
- i) an alkyl-poly(ethyleneglycol-co-propyleneglycol)-ether having a cloud point of ≥30° C., and
- ii) an alkyl-polyethyleneglycol-ether having a cloud point of ≥45° C.
- wherein the cloud points are determined according to European Standard EN 1890:2006, item 8.2, procedure A of German Version, with the modification that 10 wt % H2SO4 is used as solvent and that the concentration of the surfactant is 1000 mg/L, wherein the at least one acid is an inorganic acid, and/or methane sulfonic acid, and wherein the pH value of the cleaning solution of the invention is below 2.0,
- wherein the concentration of the first surfactant is 50-5000 mg/L.
Dependencies are inferred from the claim text.