Cationic electrodepositable compositions containing formaldehyde

Details Cationic electrodepositable compositions containing formaldehyde Cationic electrodepositable compositions containing formaldehyde

1984-07-03

1985-12-24

Ivy, C. Warren

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523415, 523416, 524210, 524211, 524510, 524512, C08K 521

Patent

active

045607176

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: 3663389 (1972-05-01), Koral et al.
patent: 3937679 (1976-02-01), Bosso et al.
patent: 3963663 (1976-06-01), Sekmakas
patent: 4028367 (1977-06-01), Higginbottom
patent: 4397756 (1983-08-01), Lehmann
patent: 4454277 (1984-06-01), Heger
patent: 4473678 (1984-09-01), Fink

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