Absorbent foam materials for aqueous body fluids and...

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 9/00 (2006.01) A61F 13/15 (2006.01) A61F 13/56 (2006.01) A61L 15/22 (2006.01) A61L 15/42 (2006.01) C08F 2/32 (2006.01) C08F 212/06 (2006.01) C08L 25/08 (2006.01)

Patent

CA 2114958

Disclosed are absorbent foam materials suitable for use as or in the absorbent cores of absorbent articles, such as diapers which absorb and retain aqueous body fluids. Such foam materials comprise hydrophilic, flexible open-celled structures which are preferably prepared by polymerizing high internal phase (HIPE) water-in-oil emulsions. Such foam materials have a pore volume of from about 12 to 100 ml/g, and a capillary suction specific surface area of from about 0.5 to 5.0 m2/g. These materials also exhibit a resistance to compression deflection such that a confining pressure of 5.1 kPa produces after 15 minutes a strain of from about 5 % to 95 % compression when the material is saturated at 37 °C to its free absorbent capacity with synthetic urine.

Mousse utilisée comme centre d'absorption (ou à l'intérieur d'un tel centre) dans des articles qui absorbent et retiennent des liquides corporels, comme les couches. Cette mousse renferme des structures hydrophiles flexibles à alvéoles ouverts qui sont préparées, de préférence, en polymérisant des émulsions eau dans huile en phase interne élevée. Elle a un volume poreux d'environ 12 à 100 ml/g ainsi qu'une surface spécifique de tension capillaire d'environ 0,5 à 5,0 m2/g. Elle démontre une résistance à la déformation telle qu'une pression de confinement de 5,1 kPa produit après 15 minutes une force de compression d'environ 5 à 95 % lorsque la mousse est saturée à 37 degrés C par rapport à sa capacité d'absorption libre d'urine synthétique.

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