AQUEOUS COMPOSITION FOR METAL SURFACE TREATMENT, METAL SURFACE TREATMENT METHOD USING THE SAME AND MANUFACTURING METHOD FOR METAL MATERIAL WITH FILM, AND METAL SURFACE TREATMENT FILM USING THE COMPOSITION AND METHOD
PROBLEM TO BE SOLVED: To provide a technique to drastically improve deposition of Bi and prevent deterioration of coating appearances, such as cissing, aggregates, etc.SOLUTION: The aqueous composition for metal-surface treatment includes cationic resin emulsion, wherein a dispersoid of the cationic...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a technique to drastically improve deposition of Bi and prevent deterioration of coating appearances, such as cissing, aggregates, etc.SOLUTION: The aqueous composition for metal-surface treatment includes cationic resin emulsion, wherein a dispersoid of the cationic resin emulsion contains an amino compound of a modified epoxy resin, a blocked polyisocyanate and a tin compound of formula 1 (wherein, m is 4 or more, n is 0 or more and 10 or less), and the dispersion medium of the cationic resin emulsion is an aqueous composition for metal surface treatment containing Bi ions. |
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