Control of staining in electrodeposition of coatings

Details Control of staining in electrodeposition of coatings Control of staining in electrodeposition of coatings

1974-04-19

1978-04-11

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

C25D 1310

Patent

active

040837629

ABSTRACT:
This invention relates to novel stain-resistant electrodepositable compositions. It has been found that electrodepositable resins, and especially those resins which are mixed fatty acid partial esters of high molecular weight polyols have a tendency to develop a stain when electrodeposited over an iron-containing substrate. This staining problem is eliminated or greatly reduced by use of a complex organic polyphosphoric ester acid anhydride.

REFERENCES:
patent: 3380927 (1968-04-01), Edelstein et al.
patent: 3493482 (1970-02-01), Irwin
patent: 3634348 (1972-01-01), Carter

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