Reverse-phase polymerisation process

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United States of America Patent

PATENT NO 9765167
APP PUB NO 20160159955A1
SERIAL NO

14908925

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Abstract

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A reverse-phase suspension polymerization process for the manufacture of polymer beads comprising forming aqueous monomer beads comprising an aqueous solution of water-soluble ethylenically unsaturated monomer or monomer blend and polymerizing the monomer or monomer blend to form polymer beads while suspended in a non-aqueous liquid, and recovering polymer beads, in which the process comprises, providing in a vessel (1) a volume (2) of non-aqueous liquid wherein the volume of non-aqueous liquid extends between at least one polymer bead discharge point (3) and at least one monomer feed point (4), feeding the aqueous monomer or monomer blend through orifices (5) into, or onto, the non-aqueous liquid to form aqueous monomer beads, allowing the aqueous monomer beads to flow towards the polymer bead discharge point subjecting the aqueous monomer beads to polymerization conditions to initiate polymerization to form polymerizing beads, wherein the polymerizing beads have formed polymer beads when they reach the polymer bead discharge point, removing a suspension of the polymer beads in non-aqueous liquid from the vessel at the polymer bead discharge point and recovering water soluble or water swellable polymer beads from the suspension. The invention also relates to the apparatus suitable for carrying out a reverse-phase suspension polymerization and polymer beads obtainable by the process or employing the apparatus.

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Patent Owner(s)

Patent OwnerAddress
BASF SECARL-BOSCH-STRASSE 38 67056 LUDWIGSHAFEN AM RHEIN GERMANY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Barratt, John Scott Mirfield, GB 5 6
Fonseca, Zepeda Gabriela Eugenia Mannheim, DE 9 12
Haschick, Robert Mannheim, DE 5 5
Hesse, Pascal Mannheim, DE 10 28
Jelicic, Aleksandra Mannheim, DE 4 5
Keelapandal, Ramamoorthy Shankara Narayanan Limburgerhof, DE 6 10
Langlotz, Bjoern Trostberg, DE 11 23
Soetje, Oliver Mannheim, DE 9 12

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