Abstract: Polyurethane powder coating materials comprising polyureas, polyesters, and crosslinkers, which have less than 15 mol % succinic acid as the polycarboxylic acid component. Matt coatings and coated materials comprising or produced using such polyurethane powder coating materials.

Abstract: The invention relates to a process for the solvent-free, continuous preparation of urethane (meth)acrylates in an extruder, intensive kneader, intensive mixer or static mixer. These urethane acrylates can be used for the preparation of radiation-curable transparent or pigmented coating compositions, in particular powder coating compositions.

Abstract: Polyurethane powder coating materials including polyureas, polyesters, and crosslinkers are deposited on metal coils to form coatings having a matt finish.

Abstract: Transparent or pigmented powder coating compositions containing carboxyl-containing polyesters and hydroxyalkylamides, and their use as transparent or pigmented powder coating materials.

Abstract: A polyaddition compound having uretdione and carboxyl groups, and having a melting range of between 40 and 200° C., a free NCO group content of from 0 to 5% by weight and an NCO functionality of at least 1.5, and a number-average molar mass of between 1000 and 10,000, may be prepared by reacting at least one polyisocyanate containing uretdione groups, at least one hydroxycarboxylic or mercaptocarboxylic acid, and one or more of at least one monofunctional compound having a functional group which is reactive toward an isocyanate, at least one aliphatic and/or cycloaliphatic polyol, at least one polyol having functional groups, and at least one aliphatic and/or cycloaliphatic polyamine. Polyurethane plastics, especially polyurethane powder coating materials may be prepared from the polyaddition compound of the present invention.

Abstract: A radiation-curable powder coating compositions based on crystalline urethane acrylates, which crosslink to light-stable and weather-stable coating films.

Abstract: Solid polyurethane powder coating compositions which contain uretdione groups and cure at low baking temperatures, to processes for preparing such compositions, and to their use for producing plastics, especially powder coatings, which crosslink to high-gloss or matt, light- and weather-stable coating films.

Abstract: A radiation curable powder coating composition, comprising I.) a binder comprising A) 60-90% by weight of at least one amorphous urethane acrylate; and B) 10-40% by weight of at least one crystalline urethane acrylate; wherein a Tg of a mixture of A) and B) is at least 35° C.; and II.) an auxiliary and an additive, excluding an UV initiator, crosslinks to yield a lightfast and weather-stable film.

Abstract: A radiation curable powder coating composition that contains a) a binder having at least one amorphous urethane acrylate having a glass transition temperature of at least 35° C. and a melting point of from 50 to 120° C.; and b) an auxiliary, can be crosslinked by radiation to produce a lightfast and weather-stable film.

Abstract: Polyurethane powder coating compositions based on semicrystalline polyesters, amorphous polyesters, and blocked polyisocyanates can be used as polyurethane powder coating materials and powder coil coating materials.

Abstract: The use of pulverulent thermosetting coating compositions based on physical mixtures of individual isocyanato isocyanurates formed from aliphatic and (cyclo)aliphatic and/or cycloaliphatic diisocyanates and from polyesters containing hydroxyl groups and terephthalic acid for coil powder coating materials, to a process for producing such coatings, and to the metal coils coated with such coating materials.

Abstract: Transparent or pigmented powder coating materials with crosslinkers comprising hydroxyalkylamides and blocked nonaromatic polyisocyanates.

Abstract: Transparent or pigmented powder coating materials with crosslinkers comprising hydroxyalkylamides and polyisocyanates containing uretdione groups.

Abstract: A polyaddition compound containing an uretdione group is obtained by solvent-free preparation in an intensive mixer, especially in a single-screw or multiscrew extruder.

Abstract: The present invention provides a solventless, continuous process, which includes: in at least one extruder, intensive compounder, intensive mixer or static mixer, mixing and heating a reaction mixture including the following (A), (B), and one or both of (C) and (D): (A) at least one aliphatic, (cyclo)aliphatic and/or cycloaliphatic C3-C50 diisocyanate compound; (B) at least one aliphatic, (cyclo)aliphatic and/or cycloaliphatic C3-C50 polyisocyanate compound containing one or more isocyanurate groups; (C) 1,2,4-triazole; (D) one or more pyrazole having the formula: where R1, R2 and R3 simultaneously or independently of one another are hydrogen or alkyl, alkenyl, aralkyl, aryl or N-substituted carbamoyl groups, halogen or —C(═O)—O—R4, where R4 is a C1-C12 alkyl group; to obtain a product mixture including at least one (semi)crystalline, blocked C3-C50 isocyanate compound and at least one amorphous, blocked C3-C50 isocyanate compound.

Abstract: The present invention relates to new cross-linking agents and thermosetting paints, which lead to improved properties such as scratch resistance of cured thermosetting paints or exhibit good solubility.

Abstract: A UV curable powder coating composition having a binder containing A) 60-90% by weight of at least one amorphous urethane acrylate and B) 10-40% by weight of at least one crystalline urethane acrylate; and having an auxiliary, crosslinks to form a light- and weather-stable paint film that possesses excellent gloss.

Abstract: The present invention provides a solventless, continuous process, which includes:

Abstract: A urethanized &bgr;-hydroxyalkylamide compound, a process for its preparation, and powder coating materials containing them.

Abstract: A solid, oxazoline-terminated, urethane-functional polyaddition compound having a melting point ranging from 40-130° C. and a free NCO content of less than 3% by weight, consisting essentially of a reaction product of a) at least one at least difunctional polyisocyanate and b) at least one hydroxy- or amino-functional oxazoline derivative, the ratio of NCO to OH equivalents ranging from 0.8:1.2 to 1.2:0.8.