Title:
架橋した微細粒のゲル状ポリマーの連続的製造方法
Document Type and Number:
Japanese Patent JP4511774
Kind Code:
B2
Abstract:
In a process for the continuous production of crosslinked, finely-divided gel polymers by co polymerisation of water-soluble mono-unsaturated monomers and poly-unsaturated comonomers in a multi-screw mixer-kneader, at least 5% of the heat of reaction is removed by evaporation of water, at least 25% with the product and the rest by cooling the reactor. A process for the continuous production of crosslinked, finely-divided gel polymers (I) involves the co polymerisation of (a) water-soluble mono-unsaturated monomers, (b) 0.001-5 mol% (based on a) monomers with at least two ethylenic double bonds and (c) 0-20 mol% water-insoluble mono-unsaturated monomers in 20-80 wt% aqueous solution in presence of initiators at 0-140degreesC, by feeding the monomer solution with the initiator and inert gas into a mixer-kneader with at least two parallel rotating shafts fitted with several kneading and transporting elements to move the materials through the mixer. In this process, at least 5% of the heat of reaction is removed by evaporation of water from the reaction mixture, at least 25% is removed with the product and the rest is removed by cooling the reactor walls.
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Inventors:
Wilfried Heide
Stephan Wickel
Thomas daniel
Joachim Nirges
Jürgen Hoffmann
Stephan Wickel
Thomas daniel
Joachim Nirges
Jürgen Hoffmann
Application Number:
JP2001540164A
Publication Date:
July 28, 2010
Filing Date:
November 10, 2000
Export Citation:
Assignee:
BASF SE
International Classes:
C08F2/01; B01J14/00; B01J19/00; B01J19/20; C08F2/10; C08F220/00
Domestic Patent References:
| JP4220407A | ||||
| JP60055002A |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel