Invention Grant
- Patent Title: Process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution
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Application No.: US14442501Application Date: 2013-11-11
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Publication No.: US09790304B2Publication Date: 2017-10-17
- Inventor: Thomas Daniel , Norbert Herfert , Stephan Bauer , Katrin Baumann , Birgit Reinhard , Jürgen Freiberg , Rudolf Schliwa
- Applicant: BASF SE
- Applicant Address: DE Ludwigshafen
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen
- Agency: Marshall, Gerstein & Borun LLP
- Priority: EP12193669 20121121
- International Application: PCT/EP2013/073457 WO 20131111
- International Announcement: WO2014/079710 WO 20140530
- Main IPC: B01J20/32
- IPC: B01J20/32 ; C08F220/06 ; C08F6/00 ; A61L15/42 ; A61L15/60 ; A61L15/22 ; C08L33/02 ; A61L15/24 ; B01J20/26 ; B01J20/28
Abstract:
The present invention relates to a process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution comprising less than 0.3% by weight of persulfate and at least 0.05% by weight of azo initiator and thermal aftertreatment of the formed polymer particles at less than 100° C. in a fluidized bed for 60 to 300 minutes.
Public/Granted literature
- US20160272745A1 A PROCESS FOR PRODUCING WATER-ABSORBENT POLYMER PARTICLES BY POLYMERIZING DROPLETS OF A MONOMER SOLUTION Public/Granted day:2016-09-22
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