Modified polyuronic acids and salts thereof
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United States of America Patent
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Feb 24, 2015
Grant Date -
Sep 19, 2013
app pub date -
Oct 14, 2011
filing date -
Oct 28, 2010
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Abstract
The present invention provides a modified polyuronic acid represented by formula (1) or a salt thereof which is excellent in surface activity: wherein R1 is a hydrogen atom, a hydrocarbon group having 1 to 40 carbon atoms or the like; X is an oxygen atom, a sulfur atom or a —NH— group, with the proviso that a ratio value of [m/(m+n)] is from 0.3 to 1.0, and a plurality of the R1 groups being present in a molecule of the modified polyuronic acid or the salt thereof may be the same or different from each other but all of the R1 groups are not hydrogen atoms at the same time.
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