Basf Corporation

Basf Coatings Gmbh

Robert D Schiller

Charles L Tazzia

Timothy S December

Abdellatif Chouai

Gregory G Menovcik

Cynthia A Stants

William H Alford

Robert Doty

Grant E Cooley

Jennifer M Lear

Frankie L Dock

Kevin M Schock

An aqueous electrodeposition coating composition comprising (a) a metal oxide selected from the group consisting of bismuth oxide, vanadium oxide, manganese oxide, cobalt oxide, zinc oxide, strontium oxide, yttrium oxide, molybdenum oxide, zirconium oxide, lanthanum oxide, oxides of the lanthanide series of elements, and combinations of these and (b) a cathodically electrodepositable binder, the binder comprising an amine-functional phosphorylated resin, provides corrosion protection equivalent to that obtained by the conventional phosphate pretreatment-electrodeposition coating process.

Metal containing integrated electrocoat for better corrosion resistance

A coating composition, such as an electrodepositable electrocoat primer coating composition, comprises a phosphorylated acrylic polymer, The coating provides excellent corrosion protection even without a conventional phosphate pretreatment.

Acrylic electrocoat composition and process replacing phosphate pretreatment

The present invention provides a method of preparing an electrocoat coating composition, comprising forming an aqueous emulsion comprising a film-forming component and water and removing at least a portion of the water from the aqueous emulsion by ultrafiltration.

Electrocoat manufacturing process

The invention relates to aqueous dispersions and aqueous electrodepositable primers made with the aqueous dispersions of the invention. The aqueous dispersion of the invention requires the use of a polymer (a) comprising one or more water dispersible groups per molecule and one or more functional groups (f), and at least one crosslinking agent (b) comprising one or more blocked functional groups (f) reactive with polymer (a) after unblocking. Crosslinking agent (b) has a Tof from 40 to 70&#xb0; C./105 to 158&#xb0; F. and is a solid at 23.9&#xb0; C./75&#xb0; F. when at 100% by weight solids. Crosslinking agent (b) is melt mixed into acrylic polymer (a) to provide a first dispersion and said first dispersion is emulsified in water to provide an aqueous dispersion. In a preferred embodiment, the aqueous electrodepositable primers comprise at least 50% by weight water and an acrylic polymer (a) having one or more salted sites per molecule.

Aqueous dispersions and aqueous electrodepositable primers

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South Lyon, MI, United States of America

Robert D Schiller