Silated polysaccharide process
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United States of America Patent
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Dec 10, 1991
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N/A
app pub date -
Sep 28, 1990
filing date -
Jun 5, 1989
priority date (Note) -
Expired
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Abstract
Silated polysaccharides having 0.005 to 2.0 silyl molar substitution per anhydrosaccharide unit form water resistant films when cast from aqueous solution and dried in the presence of atmospheric carbon dioxide. These films are soluble in aqueous caustic. A preferred water soluble polymer is a cellulose ether with 0.005 to 1.0 silyl substitution. A method for preparation involves: (1) reaction in a caustic medium; (2) recovering a neutralized silated polysaccharide; and (3) washing to remove impurities.
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