PROCESS TO PREPARE AQUEOUS POLYURETHANE DISPERSIONS THAT ARE SUBSTANTIALLY FREE OF VOLATILE ORGANIC COMPOUNDS AND THAT HAVE A HIGH SOLIDS CONTENT

A process for the preparation of a polyurethane dispersion with at least one extension agent B that has x hydroxyl groups and y amine groups, where x + y ≥ 2 with x and y equal or larger than 0, and that has an additional functional group that is capable of forming a salt, such that the dispersion...

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1. Verfasser: JANSSEN Rick Andreas Louis
Format: Patent
Sprache:eng ; spa
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Zusammenfassung:A process for the preparation of a polyurethane dispersion with at least one extension agent B that has x hydroxyl groups and y amine groups, where x + y ≥ 2 with x and y equal or larger than 0, and that has an additional functional group that is capable of forming a salt, such that the dispersion of the polyurethane has a solids content of at least 50 weight percent and does not contain acetone or other solvents or amines that have a boiling point of below 250°C. Un proceso para la preparación de una dispersión de poliuretano con al menos un agente de extensión B que tiene x grupos hidroxilo e y grupos amina, donde x + y = 2 con x e y iguales o mayores que 0, y que tiene un grupo funcional adicional que es capaz de formar una sal, de modo que la dispersión del poliuretano tiene un contenido de sólidos de al menos el 50 por ciento en peso y no contiene acetona u otros disolventes o aminas que tengan un punto de ebullición por debajo de 250 °C.