发明名称 |
Superabsorbent polymers and methods of making the same |
摘要 |
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.
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申请公布号 |
US8445617(B2) |
申请公布日期 |
2013.05.21 |
申请号 |
US201213668899 |
申请日期 |
2012.11.05 |
申请人 |
BALDUF TORSTEN;BUB GUNTHER;MOSLER JURGEN;SABBAGH ANDREAS;KOHN JURGEN;SELBACH ARNDT;EVONIK DEGUSSA GMBH |
发明人 |
BALDUF TORSTEN;BUB GUNTHER;MOSLER JURGEN;SABBAGH ANDREAS;KOHN JURGEN;SELBACH ARNDT |
分类号 |
C08F220/06;C08L33/02 |
主分类号 |
C08F220/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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