Polysaccharide aldehydes prepared by oxidation method and used as strength additives in papermaking
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United States of America Patent
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Jul 24, 2007
Grant Date -
Nov 6, 2003
app pub date -
Apr 23, 2003
filing date -
Aug 17, 1999
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Expired
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Abstract
Polysaccharide aldehydes are prepared using selective oxidation involving the use of nitroxyl radical mediated aqueous oxidation with a limited amount of oxidant and defined reaction conditions. These polysaccharide aldehyde derivatives having maximum effective aldehyde and minimal carboxylic acid levels making them especially useful as wet, temporary wet and dry strength additives for paper.
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