ELECTRODEPOSITION OF PAINT USING FORMALDEHYDE TO CONTROL PH

In a process of electrodepositing paint coatings from aqueous dispersions of film-forming material containing acidic groups neutralized by ammonia or a primary or secondary amine, the pH value of the dispersion is controlled e.g. within the range 7 to 9, by the addition of formaldehyde or derivative...

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Bibliographische Detailangaben
Hauptverfasser:	AUGUSTE LOUIS LUCIEN PALLUEL, CLIVE DOUGLAS COOK, NORMAN MORIN NESS
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	In a process of electrodepositing paint coatings from aqueous dispersions of film-forming material containing acidic groups neutralized by ammonia or a primary or secondary amine, the pH value of the dispersion is controlled e.g. within the range 7 to 9, by the addition of formaldehyde or derivatives thereof which can generate or react as formaldehyde, such as paraformaldehyde, trioxy methylene and hemi-acetals.