C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 2/32 (2006.01) B01J 8/00 (2006.01) B01J 8/12 (2006.01) B01J 19/24 (2006.01)
Patent
CA 2277099
Beads are made from water-soluble monomer or monomer blend by reverse phase bead polymerisation by extruding aqueous monomer beads into or onto the top of an upflowing column of non-aqueous liquid and the beads polymerise as they float downwardly through the column during a period of at least 1/2 minute. The resultant beads can have a very narrow particle size distribution.
L'invention concerne des perles fabriquées à partir d'un monomère hydrosoluble ou d'un mélange de monomères hydrosolubles, suivant un procédé de polymérisation en perle à phase inversée, qui consiste à extruder des perles monomères aqueuses dans ou sur la partie supérieure d'une colonne de liquide non aqueux à circulation ascendante, les perles passant à l'état de polymère à mesure qu'elles descendent le long de la colonne, pendant au moins une 1/2 minute. Les perles ainsi obtenues peuvent présenter une distribution granulométrique très étroite.
Burrows Robert David
Houlton David Andrew
Naylor Gareth Ian
Veal Jonathan Heath
Whitley Martin William
Ciba Specialty Chemicals Water Treatments Limited
Fetherstonhaugh & Co.
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