EMULSIONS AND THEIR USE IN THE PRODUCTION OF FOAMS BASED ON ISOCYANATES

• Main Authors: OTTO, Frank, HEINEMANN, Torsten, VOGEL, Stephanie, ALBERS, Reinhard, HEIDELMANN, Thomas
• Format: Patent
• Language: English; Spanish
• Published: 01.12.2017
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

The invention relates to stable emulsions for the production of foams based on isocyanates, comprising at least three polyols A1a, A1b and A1c and at least one physical blowing agent T, wherein A1a is a polyether polyol, obtained by the addition of epoxies to starter compounds selected from carbohydrates and difunctional or higher-functional alcohols, A1b is a polyether polyol started on an aromatic amine and A1c is a polyester polyether polyol, obtained by the addition of epoxies to the esterification product of an aromatic dicarboxylic acid derivative and a difunctional or higher-functional alcohol. The invention further relates to a method for producing foams by reactions of such emulsions with isocyanates and to the foams obtainable in this way and their use for insulating purposes. La invención se refiere a emulsiones estables para la producción de espumas basadas en isocianatos, que comprenden al menos tres polioles A1a, A1b y A1c y al menos un agente de expansión físico T, en las que A1a es un polioléter, obtenido mediante la adición de epoxis a compuestos iniciadores seleccionados de hidratos de carbono y alcoholes difuncionales o de funcionalidad superior, A1b es un polioléter iniciado sobre una amina aromática y A1c es un poliolesteréter, obtenido mediante la adición de epoxis al producto de esterificación de un derivado de ácido dicarboxílico aromático y un alcohol difuncional o de funcionalidad superior. La invención se refiere además a un procedimiento para producir espumas mediante reacciones de tales emulsiones con isocianatos y a las espumas obtenibles de esta forma y su uso para fines de aislamiento.