C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 3/09 (2006.01) B01F 3/08 (2006.01) B01F 13/10 (2006.01) C08F 2/32 (2006.01) C08J 9/08 (2006.01) C08J 9/28 (2006.01) A61F 13/15 (2006.01) B01F 7/00 (2006.01)
Patent
CA 2114523
(SEE FIGURE) Disclosed is a process for the continuous preparation of high internal phase emulsions which are suitable for subsequent polymerization into polymeric foam materials that, upon dewatering, act as absorbents for aqueous body fluids. The process involves continuous introduction of a certain type of monomer-containing oil phase and a certain type of electrolyte-containing water phase into a dynamic mixing zone at relatively low water to oil phase ratios. Flow rates are then steadily adjusted to increase the water to oil ratio of the streams fed to the dynamic mixing zone while subjecting the dynamic mixing zone contents to shear agitation which is sufficient to thereby form a high internal phase emulsion that, upon subsequent polymerization, provides a foam having an average cell size of from about 5 to 100 microns. The formation of such a stable high internal phase emulsion is completed by feeding the contents of the dynamic mixing zone to and through a static mixing zone.
Méthode pour la préparation en continu d'émulsions à phase interne importante, appropriées pour la polymérisation ultérieure en mousses polymériques qui, après déshydratation, agissent comme absorbants pour les fluides corporels aqueux. La méthode consiste à introduire en continu un certain type de phase huileuse renfermant un monomère, et un certain type de phase aqueuse renfermant un électrolyte, dans une zone de mélange dynamique, avec un rapport phase aqueuse/phase huileuse relativement bas. Les débits sont ensuite ajustés régulièrement de façon à augmenter ce rapport dans les circuits alimentant la zone de mélange, tout en soumettant le contenu de cette zone à une agitation par cisaillement suffisante pour produire une émulsion à forte phase interne qui, après polymérisation, donne une mousse possédant des cellules d'une taille moyenne d'environ 5 à 100 microns. La formation d'une émulsion stable à forte phase interne de ce type est complétée en faisant passer le contenu de la zone de mélange dynamique dans une zone de mélange statique.
Desmarais Thomas Allen
Dick Stephen Thomas
Shiveley Thomas Michael
Sim & Mcburney
The Procter & Gamble Company
LandOfFree
Process for preparing emulsions that are polymerizable to... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for preparing emulsions that are polymerizable to..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing emulsions that are polymerizable to... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1451566