E.i. Dupont De Nemours and Company

Helmut Hoenig

Georg Pampouchidis

Manfred Valtrovic

Klausjoerg Klein

Erik Bambach

Johann Gmoser

Roland Feola

Gerald Hobisch

Herbert Matzer

Robert Thausz

A cathodic electrodeposition coating composition which produces substantially pinhole-free coatings on galvanized surfaces, said composition comprising 0.2 to 8% by weight, based on the weight of resin solids in the composition, of at least one 5- or 6-membered cyclic imide having a (cyclo)alkyl or (cyclo)alkenyl residue comprising 4 to 12 carbon atoms on the imide nitrogen.

Cathodic electrodeposition coating compositions and process for using same

Use of homopolymers or copolymers of 2-ethyl hexyl acrylate as an additive in aqueous cathodically depositable coatings to suppress the formation of surface defects in coating films, in which the proportion by mass of the comonomers in the monomer mixture used for the preparation of the copolymers does not exceed 35%.

Electro-dipcoating baths with additives preventing the formation of craters in the baked coating

Cathodic electrodeposition coating agent containing 0.1 wt-% to 5 wt-%, based on the resin solids, of at least one polymer having an acid value of 20 to 100 mg KOH/g and a content of lateral and/or terminal aliphatic C5-C14-hydrocarbon radicals of 40 wt-% to 80 wt-%.

Cathodic electrodeposition coating agents

A two-component concentrate which includes an aqueous dispersion of a cathodically depositable binder having groups comprising active hydrogen that are cross-linkable using blocked polyisocyanate, as the binder component, and an anhydrous, organic solution of an oxime-blocked isocyanate-functional adduct of aromatic polyisocyanate and at least one compound comprising at least one group capable of addition towards isocyanate and at least one tertiary amino group, as the cross-linking component is used for the preparation of cathodic electrodeposition coating compositions.

Concentrate suitable for the preparation of cathodic electrodeposition coating compositions

Novel alkaline polymeric binders, preferably amino epoxy binders, for use in cathodic electrodeposition coatings have a number average molecular mass of 1000 to 3000, an amine value of 150 to 250 mg KOH/g binder and 50 to 230 milliequivalents/100 g binder of beta-hydroxyalkyl urethane groups of the formula HOC H OC(O)NH&mdash; where n&equals;2 to 3, as well as processes for making such binders; aqueous compositions, particularly cathodic electrodeposition compositions containing such binders (which provide improved throwing power); and process of using such compositions, particularly on automotive bodies and parts thereof, are disclosed.

Binders for use in cathodic electrodeposition coatings, process for their preparation and cathodic electrodeposition coating compositions containing same

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Kumberg, Austria

Helmut Hoenig