Invention Grant
- Patent Title: Superabsorbent polymers and methods of making the same
- Patent Title (中): 超吸收性聚合物及其制造方法
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Application No.: US13668899Application Date: 2012-11-05
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Publication No.: US08445617B2Publication Date: 2013-05-21
- Inventor: Torsten Balduf , Gunther Bub , Jurgen Mosler , Andreas Sabbagh , Jurgen Kohn , Arndt Selbach
- Applicant: Torsten Balduf , Gunther Bub , Jurgen Mosler , Andreas Sabbagh , Jurgen Kohn , Arndt Selbach
- Applicant Address: DE Essen
- Assignee: Evonik Degussa GmbH
- Current Assignee: Evonik Degussa GmbH
- Current Assignee Address: DE Essen
- Agency: Smith Moore Leatherwood LLP
- Agent Philip P. McCann
- Priority: DE102005039156 20050817
- Main IPC: C08F220/06
- IPC: C08F220/06 ; C08L33/02
Abstract:
The invention relates to producing a superabsorbent polymer comprising (I) producing a (meth)acrylic acid comprising the steps of (a) synthesizing a crude (meth)acrylic acid phase; (b) distillatively working-up the crude (meth)acrylic acid phase to obtain a (meth)acrylic acid phase and a dimer phase comprising (meth)acrylic acid dimers and/or (meth)acrylic acid oligomers; (c) splitting at least a part of the (meth)acrylic acid dimers or of the (meth)acrylic acid oligomers or both from the dimer phase to obtain a (meth)acrylic acid-comprising a low boiling phase and a high boiling phase comprising less (meth)acrylic acid than the low boiling phase; (d) separating at least a part of the (meth)acrylic acid from the low boiling phase by forming crystals to obtain a pure (meth)acrylic acid, and a residue; (II) polymerizing a monomer phase comprising the pure (meth)acrylic acid to obtain a polymer phase; and (III) working-up the polymer phase to obtain the polymer.
Public/Granted literature
- US20130072645A1 SUPERABSORBENT POLYMERS AND METHODS OF MAKING THE SAME Public/Granted day:2013-03-21
Information query
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