Polyurethane filters for air purification

Details Polyurethane filters for air purification Polyurethane filters for air purification

C - Chemistry, Metallurgy

08

J

C08J 9/00 (2006.01) B01J 20/20 (2006.01) B01J 20/28 (2006.01)

Patent

CA 2720060

A process for producing polyurethane foam filter material with adsorption capabilities, containing a solid adsorbent, that comprises a one shot process of reacting a polyurethane foam-forming formulation, comprising isocyanates and polyesters or polyethers, catalysts, silicone oils and water, characterized in that particles of the adsorbent material are included directly in the foam-forming formulation, without any surface pretreatment, after cleansing by heating. The resulting filter material can be sliced in plates of various thicknesses according to the intended particular use, and this use can be in air filtering systems, for purification of air or water, ion-exchange, deodorization, drying, prevention of public hazards, or the separation and purification.

L'invention concerne un procédé de fabrication d'un matériau filtrant en mousse de polyuréthane doté de capacités d'adsorption, qui contient un adsorbant solide. Ce procédé consiste, en une seule opération, à faire réagir une préparation moussante de polyuréthane comprenant des isocyanates et des polyesters ou des polyéthers, des catalyseurs, des huiles aux silicones et de l'eau, caractérisé en ce que les particules du matériau adsorbant sont incluses directement dans la préparation moussante, sans pré-traitement de surface, après nettoyage par chauffage. Le matériau filtrant ainsi obtenu peut être découpé en plaques de différentes épaisseurs en fonction de l'utilisation prévue: systèmes de filtration de l'air, purification de l'air ou de l'eau, échange ionique, désodorisation, séchage, prévention de risques publics, séparation et purification.

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