Coating processes – With post-treatment of coating or coating material – Heating or drying
Patent
1973-05-31
1976-02-03
Gwinnell, Harry J.
Coating processes
With post-treatment of coating or coating material
Heating or drying
427309, 427435, B05D 118, B04D 310
Patent
active
039365468
ABSTRACT:
Polymeric resinous coatings are formed on metallic surfaces by immersing them in an acidic aqueous coating composition comprising an oxidizing agent and a coating-forming polymeric resin dispersed in said composition by a dispersing agent said resin and dispersing agent being present in a predetermined proportion. The coating composition tends to become unstable as it is used. The stability of the coating composition is maintained by controlling the amounts of metal ions which tend to build-up in the bath and/or the dispersing agent. Specifically, dispersing agent and resin are added to said coating composition in amounts to replenish these ingredients and in a proportion such that the proportion of said added dispersing agent to said added resin is greater than said predetermined proportion and sufficient to maintain the stability of the dispersed resin in the composition thereby prolonging the operability of the coating composition.
REFERENCES:
patent: 3420715 (1969-01-01), Ayres
patent: 3514343 (1970-05-01), Bauman
patent: 3585084 (1971-06-01), Steinbrecher et al.
patent: 3592699 (1971-07-01), Steinbrecher et al.
patent: 3647567 (1972-03-01), Schweri
Amchem Products Inc.
Gwinnell Harry J.
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