Particle-containing foam structure

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/10 (2006.01) C08G 18/48 (2006.01) C08J 9/35 (2006.01) C08K 3/04 (2006.01)

Patent

CA 2675933

The present invention relates to a method of producing a hydrophilic polyurethane foam structure containing inert activated carbon particles. The method comprises the steps of: (a) providing a water phase containing a surfactant and dispersed inert particles; (b) providing a isocyanate-terminated polyether having functionality of more than 2; (c) mixing said water phase and said isocyanate-terminated polyether, immediately transferring the resulting mixture to a mould or a continuous web, whereby a foam structure is obtained; and (d) drying said foam structure until it has a moisture content of at most 10 % (wt). The invention also relates to a foam structure produced by the method and a wound dressing containing the foam structure.

La présente invention concerne un procédé de production d'une structure de mousse polyuréthanne hydrophile contenant des particules de charbon actif inertes. Le procédé comprend les étapes consistant: (a) à prendre une phase aqueuse contenant un tensioactif et des particules inertes en dispersion; (b) à prendre un polyéther à terminaison isocyanate présentant une fonctionnalité supérieur à 2; (c) à mélanger ladite phase aqueuse et ledit polyéther à terminaison isocyanate, à transférer immédiatement le mélange obtenu vers un moule ou une bande continue, une structure de mousse étant ainsi obtenue; et (d) à sécher ladite structure de mousse jusqu'à ce qu'elle présente une teneur en humidité d'au plus 10% (en poids). L'invention concerne également une structure de mousse produite selon le procédé et un pansement contenant la structure de mousse.

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