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Title:
The negative phase polymerizing method
Document Type and Number:
Japanese Patent JP6227140
Kind Code:
B2
Abstract:
A reverse-phase suspension polymerisation process for the manufacture of polymer beads comprising forming aqueous monomer beads of an aqueous solution comprising water-soluble ethylenically unsaturated monomer or monomer blend and polymerising the monomer or monomer blend to form polymer beads while suspended in a non-aqueous liquid, recovering polymer beads, and then cleaning the non-aqueous liquid in which the process comprises providing the non-aqueous liquid in a vessel (1), forming a suspension of monomer beads from the aqueous monomer or monomer blend in the non-aqueous liquid, initiating polymerisation to form polymerising beads, removing a suspension of the polymer beads in non-aqueous liquid from the vessel and recovering, water soluble or water swellable polymer beads from the suspension, in which the non-aqueous liquid contains impurities which comprise particles, and then transferring the non-aqueous liquid from the suspension to a cleaning stage, in which the cleaning stage provides a cleaned non-aqueous liquid suitable for use in a reverse-phase suspension polymerisation process, which cleaning stage comprises removing particles from the non-aqueous liquid in at least one filtration step. The invention also relates to the apparatus suitable for carrying out a reverse-phase suspension polymerisation and polymer beads obtainable by the process or employing the apparatus. The invention further relates to a cleaned non-aqueous liquid obtainable by the process.

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Inventors:
John Scott Barrat
Alexandra Jerichic
Pascal hesse
Oliver Zetje
Low beat hasic
Gabriella Eugenia Fonseca Cepeda
Shankara Narayanan Keira Pandal Ramam Aji
Zandra Yeck
Yelan Kuhn
Application Number:
JP2016530487A
Publication Date:
November 08, 2017
Filing Date:
July 29, 2014
Export Citation:
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Assignee:
BASF SE
International Classes:
C08F2/32; C08F2/01; C08F2/18; C08F6/24; C08F20/02; C08F22/02; C08F26/10
Domestic Patent References:
JP2010515796A
JP5255412A
JP5194611A
JP2001508099A
Attorney, Agent or Firm:
Einzel Felix-Reinhard
Junichi Maekawa
Hiroyasu Ninomiya
Ueshima



 
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