Methods for the reduction of bleeding of lignosulfonates from lignosulfonate-treated substrates
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United States of America Patent
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Aug 28, 2001
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N/A
app pub date -
Dec 17, 1999
filing date -
Dec 17, 1999
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Expired
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Abstract
The bleeding of lignosulfonates from lignosulfonate-treated substrates when contacted under humid conditions is reduced by rendering the lignosulfonates water-insoluble via reacting them with an amine polymer-epichlorohydrin adduct containing at least one quaternary ammonium group under acidic conditions.
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