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公开(公告)号：DE602004018761D1
公开(公告)日：2009-02-12
申请号：DE602004018761
申请日：2004-03-20
Applicant: BASF SE
Inventor： BENNETT ANDREA KAREN , MITCHELL MICHAEL A , CARRICO PETER W
IPC: B01D61/14 , A61L15/60 , B01D61/02 , B01D61/04 , B01D61/16 , B01D63/16 , C08F6/06 , C08F6/12 , C08F8/12 , C08J3/03 , C08L39/02
Abstract: Process for reducing the content of water-soluble salts of aqueous solutions of polymers containing vinylamine groups by ultrafiltration to achieve a residual salt content of 1 to 10% by weight based on total solution solids in the polymer solution comprising feeding an aqueous salt-containing solution of vinylamine group containing polymers at a polymer concentration of at least 7% by weight to an ultrafiltration unit and removing the water-soluble salts with the permeate from the feed solution by adding thereto less than 4 parts by weight of water per one part by weight of the feed solution, and use of the polymer of the aqueous solutions thus purified as basic water-absorbing resin of multicomponent superabsorbent polymers. Preferably vibratory shear membranes in a diafiltration configuration are used.
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公开(公告)号：AT472568T
公开(公告)日：2010-07-15
申请号：AT06708614
申请日：2006-03-03
Applicant: BASF SE
Inventor： STEINMETZ BERNHARD , CARRICO PETER W , ADEY VERNON L
IPC: C08F220/00
Abstract: Water-absorbent crosslinked polymers bearing acid groups, some or all of the acid groups being present as carboxylate groups having at least two different types of cations as counterions, processes for their preparation and mixtures of water-absorbent crosslinked polymers.
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公开(公告)号：DE602004024047D1
公开(公告)日：2009-12-24
申请号：DE602004024047
申请日：2004-03-19
Applicant: BASF SE
Inventor： HERFERT NORBERT , AZAD MICHAEL M , CARRICO PETER W
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公开(公告)号：DE602006015170D1
公开(公告)日：2010-08-12
申请号：DE602006015170
申请日：2006-03-03
Applicant: BASF SE
Inventor： STEINMETZ BERNHARD , CARRICO PETER W , ADEY VERNON L
IPC: C08F220/00
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