LOW NMP AQUEOUS POLYURETHANE COMPOSITION WITH A DILUENT

• Main Authors: KUZMIN, ANN, OVERBEEK, GERARDUS, CORNELIS, ROELANDS, MARC, TENNEBROEK, RONALD, VAN CASTEREN, ILSE, COOGAN, RICHARD, GEORGE
• Format: Patent
• Language: English; French
• Published: 12.01.2006
• Edition: 7
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; 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 MATERIALS THEREFOR; WOODSTAINS

An aqueous composition with a sediment content < 5%, comprising a polyurethane dispersion wherein the polyurethane has an acid value in the range of from 25 to 65 mgKOH/g and comprises (i) 36 to 60 wt% of at least one aromatic polyisocyanate and where the polyurethane is prepared in the presence of (a) < 5 wt% of 1-methyl-2­pyrrolidinone by weight of the polyurethane, (b) at least one diluent and (c) water. L'invention concerne une composition aqueuse à contenu sédimentaire < 5 %, comprenant une dispersion de polyuréthanne dans laquelle le polyuréthanne possède une valeur acide comprise entre 25 et 65 mgKOH/g et comprend 36 à 60 % en poids d'au moins un polyisocyanate aromatique, ledit polyuréthanne étant préparé en présence a) de < 5 % en poids de 1-methyl-2-pyrrolidinone par poids de polyuréthanne,(b) d'au moins un diluant et c) d'eau.