Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1985-10-03
1986-08-12
Ivy, C. Warren
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
C25D 1310, C25D 1306
Patent
active
046054782
ABSTRACT:
Formaldehyde-containing cationic electrodepositable compositions to which are added a formaldehyde scavenger are disclosed. Also disclosed are the use of these compositions in a method of cationic electrodeposition. Free formaldehyde in cationic compositions can lower the pH of the compositions making them more corrosive to the metal parts such as ferrous metal tanks and attending piping and pumps in contact with such compositions. The presence of the formaldehyde scavenger in such compositions stabilizes the pH.
REFERENCES:
patent: 3963663 (1976-06-01), Sekmakas
patent: 4028367 (1977-06-01), Higgenbottom
patent: 4397756 (1983-08-01), Lehmann
patent: 4454277 (1984-06-01), Heger
patent: 4473678 (1984-09-01), Fink
Christenson Roger M.
Plasynski Joseph E.
Scriven Roger L.
Valko Joseph T.
Ivy C. Warren
PPG Industries Inc.
Uhl William J.
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