申请人:Atotech Deutschland GmbH
公开号:US20200140782A1
公开(公告)日:2020-05-07
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 % H
2
SO
4
is used as solvent and that the concentration of the surfactant is 1000 mg/L.