Scm Corporation

Vincent D McGinniss

Donald R Stevenson

James R Erickson

Vincent W Ting

Robert Joseph Seidewand

Miksa De Sorga

John David LaBash

Ann F Kah

An ungelled composition of matter comprising a compound containing groups reactive with isocyanate, a compound containing groups reactive with mercaptan, and a carbamothioate curing agent adapted to generate a plurality of curing units upon being subjected to heating above about critical temperature. The generated curing units contain isocyanate groups, mercaptan groups, or combinations thereof. In preferred embodiments of this invention, the ungelled composition is adapted for use in powder coatings, anodic electrocoating, and cathodic electrocoating.

Compositions containing carbamothioate curing agents and their uses

Process for electrodeposition of compositions containing carbamothioate

An electrocoating composition containing a polymer having pendant amine groups, an alpha-, beta-ethylenically unsaturated carbonyl cross-linking agent, and an ultraviolet photosensitizer can be electrodeposited onto a cathode substrate disposed within an aqueous electrocoating bath. The amine groups of the polymer are protonated to render the polymer water dispersible prior to electrodeposition and upon electrodeposition the amine groups become de-protonated. The cross-linking agent cross-links the polymer upon ultraviolet irradiation of the electrocoated cathode substrate to form a fully-cured electrodeposited coating on the cathode substrate.

Process for cathodic electrocoating and photocuring

An ultraviolet radiation curable coating composition containing a certain adhesion promotor for adhesion to metal substrates. The ultraviolet curable coating composition comprises an ethylenically unsaturated binder vehicle, about 10% to 40% by weight of a certain high T.sub.g (glass transition temperature) adhesion promotor polymeric additive, and an ultraviolet sensitizer.

Radiation polymerization of polymeric binder coating compositions

Powder paint coatings of this invention are particularly suitable for ultraviolet curing and comprise specific spatial arrangements of ethylenically unsaturated polymers. The polymers contain pendant double bond unsaturation in combination with an epoxy adduct spaced on the polymer chain from a polyester adduct. The powder paint is free of cold flow and can be applied electrostatically or physically to metal substrates, moderately heated to obtain desired flow out, and then cross-linked or cured by ultraviolet irradiation.

Ultraviolet curable powder paints

A curable coating composition contains a polymer having pendant mercaptan groups and a bis-maleimide cross-linking agent. The mercaptan groups of the polymer cross-link with the bis-maleimide upon curing to form a fully cured coating. In a preferred embodiment, the coating composition serves as a cathodic electrocoating composition.

Aqueous coating composition and process

Process for coating a substrate with a heat-curable coating composition comprising a compound having labile hydrogenation groups, a compound having unsaturated carbon-carbon or epoxy groups, and a carbamothioate curing agent. Heat-curing of the coated substrate above the critical temperature initiates formation of mercaptan and isocyanate curing units from the carbamothioate curing agent which curing units react with said compounds to cure the coating. In preferred embodiments the coating composition is dispersed in water, a fugative organic solvent, or is a powder coating.

Coating process with compositions of active hydrogen compound,

An aqueous coating composition comprises a polymer having pendant mercaptan groups and cross-linking agent having alpha-, beta-ethylenically unsaturated carbonyl groups in aqueous dispersion. In a preferred embodiment, the coating composition serves as a cathodic electrocoating composition.

Aqueous coating composition from a mercaptan containing polymer and a

Ultraviolet curable epoxy-polyester powder paints

An improved ultraviolet curable aqueous latex paint suitable for use as coil coatings comprises a high molecular weight primary latex binder in combination with minor amounts of an emulsified low molecular weight cross-linking agent adapted to cross-link the high molecular weight latex particles upon exposure to ultraviolet energy.

Ultraviolet curable latexes

An electrocoating composition useful for electrocoating a paint from an aqueous solution onto a cathode conductive substrate can be cured with ultraviolet energy. The electrocoating composition containing an ultraviolet sensitizer uniformly electrodeposits on the cathode substrate to provide a paint film thereon containing a constant level of ultraviolet sensitizer relative to a reactive ethylenically unsaturated polymer.

Ultraviolet curing of electrocoating compositions

A heat-curable, aqueous coating composition comprises a polymer having pendant primary and/or secondary amine groups and a cross-linking agent having alpha-, beta-ethylenically unsaturated carbonyl groups in aqueous dispersion. The amine groups are protonated to render the polymer water dispersible. In one preferred embodiment, the coating composition is useful in cathodic electrocoating.

Aqueous coating composition

Aqueous coating composition and process from a mercaptan containing

An electrocoating composition containing a polymer having pendant tertiary amine groups, a polymer containing pendant mercaptan groups, an apha-, beta-ethylenically unsaturated carbonyl cross-linking agent, and a photosensitizer can be electrodeposited onto a cathode substrate disposed within an aqueous electrocoating bath. Full cure of the electrodeposited coating on the cathode substrate is obtained by the combination of heat curing and ultraviolet radiation curing. In a specific embodiment of the present invention, a single polymer contains both the pendant tertiary amine groups and pendant mercaptan groups.

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Valley City, OH, United States of America

Vincent D McGinniss