Strengthening compositions and treatments for lignocellulosic materials
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United States of America Patent
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Apr 3, 2001
Grant Date -
N/A
app pub date -
Dec 9, 1999
filing date -
Dec 9, 1999
priority date (Note) -
Expired
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Abstract
The strength of lignocellulosic materials is improved by treating them with water-soluble strengthening agents containing sulfonic units, and rendering these agents water-insoluble by reacting them with compounds containing epoxide rings and quaternary ammonium groups. Thus, a substantial reduction or elimination of the bleeding of said strengthening agents from the lignocellulosic materials when touched with wet hands or contacted under humid conditions is achieved.
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