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OwnerMoises Luzia Goncalves Pinto, Joao Manuel Pires DA Silva +3inventors
InventorsMoises Luzia Goncalves Pinto, Joao Manuel Pires DA Silva, Joao Carlos Moura Bordado, Antonio Nunes Barata, Jose Boavida Valente
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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.
A process for producing a polyurethane foam base material for filters with adsorption properties, characterized in that it comprises a one shot reaction of a polyurethane foam-forming formulation comprising a mixture of at least one polyisocyanate, at least one polyol, at least one silicone oil, at least one catalyst and water, which includes the addition of solid adsorbents during the foaming process without any surface pre-treatment in addition to a previous cleansing of the solid adsorbents by heating before being mixed in the foam forming formulation and in which the polymerization reaction is highly catalysed to produce a fast raise of the foam with the adsorbent.
Dependencies are inferred from the claim text.