Henkel Corporation

Henkel Kommanditgesellschaft Auf Aktien (henkel Kgaa)

Henkel Kommanditgesellschaft Auf Aktien

Henkel Ag & Company, Kgaa

Zhiqi Yang

Brian D Bammel

William E Fristad

John D McGee

Rajat K Agarwal

Elizabeth J Siebert

Christopher G Weller

Gregg W Rossier

The invention provides high solids epoxy-based autodeposition coating materials and a means to obtain the high solids epoxy-based autodeposition coating materials that eliminates/minimizes the need for process solvents. An epoxy pre-polymer is used. The epoxy pre-polymer is combined with ethylenically unsaturated monomer, as an alternative to organic solvent, to yield an epoxy-monomer blend, which may be blended with other coating components and additives. The resulting blend is then dispersed in water with surfactant and the ethylenically unsaturated monomer is polymerized (in the presence of other formulation components) to yield a dispersion. The dispersion may then be used as one component of a coating formulation. The coating formulation can then be applied to materials and cured to form a final coating.

Corrosion resistant films based on ethylenically unsaturated monomer modified epoxy emulsions

Epoxy resins that have one or more functional groups that impart an anionic character to the epoxy resins are prepared. The resulting anionic functionalized epoxy resins may be used to produce high solids, epoxy-based dispersions that are capable of being used as a component of a coating bath which can provide to a coating that may be applied to a surface using a variety of techniques.

Epoxy dispersions for use in coatings

Autodeposited coatings useful for protecting metal surfaces and in production of rubber-to-metal composites are obtained by curing adducts based on epoxy resins which are adhered to the metal surface. One or more epoxy resins, such as for example, the combination of a diglycidyl ether of bisphenol A and a flexibilizing epoxy resin, may be prereacted to form an adduct of higher average molecular weight than the starting epoxy resins. Said adduct may then be dispersed in water, with the resulting dispersion being used in an autodeposition bath composition.

Epoxy resin-based autodeposition coatings

Autodeposition compositions for polymeric coatings of reduced gloss, good corrosion resistance, and uniform appearance are prepared using a combination of acrylic and epoxy resins.

Autodeposition compositions

The anticorrosive properties of a coating autodeposited on a metal substrate are improved by contacting the autodeposited coating with an aqueous solution of an alkaline earth metal compound such as calcium nitrate prior to curing.

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Troy, MI, United States of America

Zhiqi Yang