Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1994-10-28
1997-04-29
Hoke, Veronica P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523435, 523442, 523451, 523456, 523458, 523460, 523406, C08K 324
Patent
active
056249780
ABSTRACT:
This invention relates to aqueous epoxy resin-containing compositions useful for depositing coatings on metallic substrates in order to protect substrates against corrosion. The aqueous compositions generally comprise (A) an organic resin component consisting essentially of at least one water-dispersible or emulsifiable epoxy resin; (B) a non-ionic emulsifier, (C) chromium trioxide, (D) a conductive pigment, (E) water, and, optionally, polytetrafluorethylene as a lubricant. The compositions may also contain phosphoric acid or an alkylphosphoric acid. These compositions are useful in coil coating operations to improve the electrocoatability of a metal substrate, in particular, steel, galvanized or aluminized substrates. The basecoated metal can then be conventionally coated or electro coated with weldable or non-weldable primer coatings and may be followed by the application of decorative topcoats. The invention also relates to metal substrates which have been coated with the pretreatment coating and, optionally, the weldable or non-weldable primer coatings.
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Anderson Karl P.
Holtmann Wendy M.
Sekerak John R.
Soltwedel Jeffrey N.
Witherup Lori E.
Didrick Robert M.
Hoke Veronica P.
Morton International Inc.
White Gerald K.
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