Pulverulent polymers crosslinked on the surface
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United States of America Patent
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Jan 2, 2007
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N/A
app pub date -
Sep 27, 2002
filing date -
Mar 31, 2000
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Abstract
The present invention relates to a pulverulent polymer post-crosslinked on the surface and absorbing water or aqueous liquids, synthesised from polymerised, optionally pre-crosslinked monomers containing partially neutralised carboxyl groups. The present invention also relates to a process for the post-treatment of the aforementioned polymers and the use of a solution of at least one salt of an at least trivalent cation for restoring the gel permeability of the aforementioned polymers that have been damaged by mechanical action.
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