High solids low viscosity polysaccharides
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United States of America Patent
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Apr 25, 2000
Issued Date -
N/A
app pub date -
Jan 15, 1993
filing date -
Jul 2, 1990
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Expired
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Abstract
Hydroxyethylcellulose (HEC), hydrophobically modified hydroxyethylcellulose (HMHEC), hydroxypropylcellulose (HPC), methylhydroxypropylcellulose (MHPC), carboxymethylhydroxyethylcellulose (CMHEC), guar, starch, xanthan, hydroxypropylguar (HP Guar) or carboxymethylhydroxypropylguar (CMHP Guar) are stepwise or continuously reacted with hydrogen peroxide to produce aqueous compositions with a solids content greater than 5% by weight at a viscosity at 25.degree. C. below 9500 mPa.s. It is preferred to use 30-50% hydrogen peroxide to depolymerize the polysaccharide.
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