METHOD FOR THE PREPARATION OF AQUEOUS POLYURETHANE DISPERSIONS

• Main Authors: PÉREZ BRIONES, Aurora, ZHAO, Ligang, GIMENO GORMAZ, Nélida
• Format: Patent
• Language: English; French
• Published: 17.08.2017
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES

The present invention relates to methods for the solvent-free preparation of aqueous polyurethane dispersions that can be used as adhesives or coatings, are surfactant and solvent free and have low VOC emissions, are environmentally friendly, and provide for homogeneous and aging-resistant adhesives after drying. Also encompassed are the thus obtained dispersions, compositions containing them and their use as coatings and adhesives. La présente invention concerne des procédés de préparation sans solvant de dispersions aqueuses de polyuréthane qui peuvent être utilisées comme adhésifs ou revêtements, qui sont sans tensioactif et sans solvant, et qui présentent de faibles émissions de COV, sont écologiques et donnent des adhésifs homogènes et résistant au vieillissement après séchage. L'invention concerne également les dispersions ainsi obtenues, des compositions les contenant et leur utilisation comme revêtements et adhésifs.