Surface cross-linked superabsorbent polymer particles and methods of making them
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United States of America Patent
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Jan 18, 2011
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app pub date -
Aug 7, 2009
filing date -
Jul 20, 2004
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Abstract
Superabsorbent polymer particles with improved surface cross-linking and their use in absorbent articles. The superabsorbent polymer particles comprise polymer chain segments, wherein at least a part of the polymer chain segments are covalently cross-linked to each other and wherein at least a part of the cross-links include the reaction product of cross-linking molecules having at least two C═C double bonds and further include the reaction product of radical former molecules. These cross-links are present at surfaces of the superabsorbent polymer particles.
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