Patent ID: 6448363
Filing Date: 2002-09-10
Classification: C08G

Abstract:
A solventless, continuous process, comprising:in at least one extruder, intensive compounder, intensive mixer or static mixer, mixing and heating a reaction mixture comprising the following (A), (B), and one or both of (C) and (D): (A) at least one aliphatic and/or cycloaliphatic C3-C50 diisocyanate compound; (B) at least one 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 â€”C(&boxH;O)â€”Oâ€”R4, where R4 is a C1-C12 alkyl group or R2 is nitro; to obtain a product mixture comprising at least one (semi)crystalline, blocked C3-C50 isocyanate compound and at least one amorphous, blocked C3-C50 isocyanate compound.