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: The invention relates to a process for the solvent-free continuous preparation of a polymeric composition comprising a polymer and a thermoset, where the thermoset is prepared in the polymer matrix from its corresponding starting components, by reaction in an extruder, intensive kneader, intensive mixer, or static mixer, through intensive mixing and rapid reaction by briefly heating and with subsequent cooling to isolate the final product.

Abstract: The invention relates to a process for the solvent-free, continuous preparation of polyureas by reacting at least one isocyanate and/or isocyanurate having at least two NCO groups with at least one diamine and/or polyamine in an extruder, intensive kneader, intensive mixer or static mixer by thorough mixing and rapid reaction by briefly heating and subsequent cooling to isolate the end product.

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 provides a solventless, continuous process, which includes:

Abstract: Process for the continuous preparation of hydroxyalkylamides Process for the continuous preparation of hydroxyalkylamides from carboxylic esters and alkanolamines, wherein the reaction of the starting materials is carried out in an extruder or intensive mixer by intensive mixing and brief reaction with supply of heat and simultaneous removal of the alcohol formed and the final product is then isolated.