AQUEOUS FLAME-RETARDANT POLYURETHANE/ACRYLATE HYBRID POLYMERIC DISPERSIONS

• Main Authors: PÉREZ BRIONES, Aurora, ZHAO, Ligang, GIMENO GORMAZ, Nélida, SAUCA, Sorin N
• Format: Patent
• Language: English; French; German
• Published: 15.11.2017
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; 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 BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; 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; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES; USE OF MATERIALS THEREFOR; WOODSTAINS

The present invention relates to methods for the preparation of aqueous polyurethane/acrylic hybrid dispersions comprising hydrophobic flame retardants that can be used as adhesives or coatings, are surfactant free and have low VOC emissions and are environmentally friendly, are cost-efficient due to having high acrylic contents, and provide for homogeneous and aging-resistant adhesives after drying. As hybrid materials, they provide for a versatile system that can be finely tuned and combines the advantageous properties of polyurethane and polyacrylate materials. Also encompassed are the thus obtained aqueous dispersions, compositions containing them and their use as coatings and adhesives.