发明名称 |
SUPERABSORBENT POLYMERS AND METHODS OF MAKING THE SAME |
摘要 |
In some embodiments, a process for producing a polymer comprises (I) producing a pure (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 or (meth)acrylic acid oligomers or both; (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 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 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. |
申请公布号 |
US2012226003(A1) |
申请公布日期 |
2012.09.06 |
申请号 |
US201213461220 |
申请日期 |
2012.05.01 |
申请人 |
BALDUF TORSTEN;BUB GUNTHER;MOSLER JURGEN;SABBAGH ANDREAS;KOHN JURGEN;SELBACH ARNDT;EVONIK STOCKHAUSEN GMBH |
发明人 |
BALDUF TORSTEN;BUB GUNTHER;MOSLER JURGEN;SABBAGH ANDREAS;KOHN JURGEN;SELBACH ARNDT |
分类号 |
C08F2/44;C08F120/06 |
主分类号 |
C08F2/44 |
代理机构 |
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代理人 |
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