Humidity sensitive composition

Details Humidity sensitive composition Humidity sensitive composition

C - Chemistry, Metallurgy

09

F

C09F 9/00 (2006.01) A01N 25/10 (2006.01) B01D 53/28 (2006.01) B01J 20/10 (2006.01) B01J 20/26 (2006.01) C08K 3/34 (2006.01) C08L 33/06 (2006.01) C08L 101/14 (2006.01) A61G 17/00 (2006.01) A61L 9/01 (2006.01) G05D 22/00 (2006.01)

Patent

CA 2405707

A humidity responsive control device consists of a package having at least one face that is a permeable to liquid and gases and water vapour and is formed by mixing together a) 5 to 50 % by weight of a hygroscopic polyacrylate and/or PVA polymer, b) 10 to 60 % of porous silica minerals such as vermiculite and perlite, c) 5 to 50 % of an absorbent such as zeolite or activated carbon for small molecules such as ammonia and d) 5 to 60 % by weight of an aqueous emulsion of a mixture of an active ingredient of one or more of a bacteriocidal, fungicidal or odour masking compounds. The device is effective at eliminating and masking odours under varying humidity conditions.

L'invention porte sur un dispositif de commande sensible à l'humidité et comprenant un conditionnement doté d'au moins une face perméable au liquide et aux gaz et à la vapeur d'eau. Ce dispositif est obtenu par le mélange de : a) 5 à 50 % en poids d'un polyacrylate hygroscopique et/ou d'un polymère PVA, b) 10 à 60 % de minéraux contenant de la silice poreuse tels que la vermiculite et la perlite, c) 5 à 50 % d'un absorbant tel que la zéolite ou un charbon actif pour de petites molécules telles que l'ammoniac et d) 5 à 60 % en poids d'une émulsion aqueuse d'un mélange d'un ingrédient actif constitué d'un ou plusieurs composés bactéricides, fongicides ou de composés masquant les odeurs. Ce dispositif est efficace pour éliminer et masquer les odeurs dans des conditions de variation de l'humidité.

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