Absorbent structures comprising coated super-absorbent polymer particles
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United States of America Patent
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Dec 25, 2007
Grant Date -
Oct 26, 2006
app pub date -
Jun 26, 2006
filing date -
Jun 30, 2004
priority date (Note) -
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Abstract
This invention is directed to super-absorbent material, which comprises a super absorbent polymer core that is coated with an organic, polar coating agent, and whereby the particulate super-absorbent material has a contact angle and a corresponding cos CA.sub.m (as defined herein), whereby the cos CA.sub.m is more than 0.3, and whereby, when said coating agent is in the form of particles, said coating agent particles have a (weight) mean particle size of from 0.001 to 1 micron. The material is useful for absorbent structures and absorbent articles (comprising such structures). The coated super-absorbent material is typically present in said absorbent structure at least at a concentration of 50% by weight of the structure, preferably even 80% or even 90%. The invention also provides a process for making the absorbent material.
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