B - Operations – Transporting – 01 – F
Patent
B - Operations, Transporting
01
F
B01F 3/08 (2006.01) C08F 2/22 (2006.01) C08J 9/28 (2006.01)
Patent
CA 2208419
An improvement in a continuous process for making high internal phase emulsions that are typically polymerized to provide microporous, open-celled polymeric foam materials capable of absorbing aqueous fluids, especially aqueous body fluids such as urine. The improvement involves recirculating a portion (about 50 % or less) of the emulsion withdrawn from the dynamic mixing zone of this continuous process. This increases the uniformity of the emulsion ultimately obtained from this continuous process in terms of having the water droplets homogeneously dispersed in the oil phase. This also improves the stability of the HIPE and expands the temperature range for pouring and curing this HIPE during subsequent emulsion polymerization.
Procédé amélioré de préparation en continu d'émulsions à phase interne élevée, c'est-à-dire, dont le rapport entre la phase aqueuse et la phase huileuse est relativement élevé (HIPE) et qui sont polymérisées de façon que des matériaux en mousse polymère microporeuse à cellules ouvertes, capables d'absorber des fluides aqueux, particulièrement des fluides corporels aqueux tels que l'urine soient obtenus. L'amélioration consiste à faire recirculer une partie (égale ou inférieure à 50%) de l'émulsion retirée de la zone de mélange dynamique du processus en continu. Ceci permet d'augmenter l'uniformité de l'émulsion obtenue à la fin dudit processus, sous l'effet de la dispersion homogène des gouttelettes d'eau dans la phase huileuse. Ceci permet également d'améliorer la stabilité de l'émulsion HIPE et d'agrandir la plage de température de coulée et de durcissement de ladite émulsion pendant sa polymérisation subséquente en émulsion.
Sim & Mcburney
The Procter & Gamble Company
LandOfFree
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