RETICULANTES ACUOSOS DE POLIISOCIANATO CON ACIDO HIDROXIPIVALICO Y BLOQUEADOS CON DIMETILPIRAZOL

• Main Authors: PETZOLDT, JOACHIM, KONIG, EBERHARD, BLUM, HARALD, MULLER, HEINO
• Format: Patent
• Language: Spanish
• Published: 16.04.2005
• Edition: 7
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS THEREFOR; WOODSTAINS

LA INVENCION TRATA DE RETICULANTES ACUOSOS, DE POLIISOCIANATO BLOQUEADOS CON COMPUESTOS CICLADOS DE PIRAZOL, SU FABRICACION Y UTILIZACION COMO COMPONENTES DE BARNICES CLAROS O COMPONENTES DE RELLENO EN EL PINTADO DE AUTOMOVILES. Aqueous or water-dilutable blocked polyisocyanate (I) consists of: (a) 100 equivalent-% polyisocyanate component, (b) 60-85 equivalent-% pyrazole compound as blocking agent, (c) 15-40 equivalent-% monohydroxycarboxylic acid to give hydrophilic properties and (d) 0-15 equivalent-% difunctional chain extender with hydroxyl (OH) and/or amino groups. The ratio of isocyanate (NCO) groups in (a) to NCO-reactive groups in (b), (c) and (d) is 1:(0.8-1.2). An Independent claim is also included for the preparation of (I).