Cationic electrodepositable compositions through the use of sulf

Details Cationic electrodepositable compositions through the use of sulf Cationic electrodepositable compositions through the use of sulf

1988-09-26

1990-06-12

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

523404, 523411, 523414, 523415, 524901, C25D 1306, C08L 6300, C08L 6302

Patent

active

049330560

ABSTRACT:
A cationic electrodepositable composition containing a resinous phase dispersed in an aqueous medium is disclosed. The resinous phase has basic nitrogen groups which are at least partially neutralized with sulfamic acid or a derivative thereof, that is, an acid of the formula: ##STR1## where R is H or C.sub.1 to C.sub.4 alkyl. The compositions are in the form of relatively small particle size aqueous dispersions, and when used in the process of cationic electrodeposition, enable the formation of thick films with high throwpower. Also, the use of sulfamic acid passivates the anode.

REFERENCES:
patent: 4419467 (1983-12-01), Wismer
patent: 4677168 (1987-06-01), Hoy
patent: 4724244 (1988-02-01), Kempter et al.
"Cathodic Codeposition of Metals and Polymers" by Deinega et al, Kolloidnyi Zhurnal, 37, No. 4, Jul.-Aug. 1975, pp. 691-695.

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