Use of polyglycerol aliphatic ether emulsifiers in making...

C - Chemistry – Metallurgy – 08 – F

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C08F 2/32 (2006.01) A61L 15/42 (2006.01) B01F 17/00 (2006.01) C08F 220/18 (2006.01) C08F 232/00 (2006.01) C08J 9/28 (2006.01)

Patent

CA 2208372

A process for preparing high internal phase emulsions (HIPE) that can be polymerized to provide flexible, microporous, open-celled polymeric foam materials capable of absorbing aqueous fluids, especially aqueous body fluids such as urine. The HIPE is prepared using certain polyglycerol aliphatic ether emulsifiers that are less chemically complex and variable in composition than many prior HIPE emulsifiers, have higher levels of the desired interfacially active components, and have lower levels of components (e.g., sludge) that are insoluble or insufficiently soluble in the oil phase used to prepare the HIPE. These polyglycerol aliphatic ether emulsifiers provide HIPE having relatively uniform sized water droplets dispersed in the continuous oil phase.

Procédé de préparation d'émulsions eau-dans-huile, dont le rapport entre la phase aqueuse et la phase huileuse est relativement élevé (HIPE) et qui peuvent être polymérisées, de façon à obtenir des matériaux en mousse polymère souple, microporeuse, à cellules ouvertes, capables d'absorber des fluides aqueux, particulièrement, des fluides corporels aqueux, tels que l'urine. On prépare l'émulsion HIPE au moyen de certains émulsifiants d'éther aliphatique de polyglycérol, dont la composition chimique est moins complexe et variable que celle de nombreux émulsifiants actuels de HIPE et qui possèdent des niveaux supérieurs des constituants souhaités à contact actif et des niveaux inférieurs de constituants (par exemple, des boues) insolubles ou insuffisamment solubles dans la phase huileuse utilisée dans la préparation de HIPE. Ces émulsifiants d'éther aliphatique de polyglycérol permettent d'obtenir une émulsion HIPE dans laquelle les gouttelettes d'eau dispersées dans sa phase huileuse continue présentent une dimension relativement uniforme.

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