Cellulose ether blends of increased bulk density, their use in construction material systems, and a process for producing cellulose ether blends of increased bulk density
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United States of America Patent
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Issued Date -
Nov 11, 2004
app pub date -
Jan 30, 2004
filing date -
Feb 6, 2003
priority date (Note) -
Abandoned
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Abstract
The present invention encompasses cellulose ether blends comprising a) cellulose ether, b) from 0.1 to 10% by weight of an additive selected from starch, starch ether, guar, guar ether and xanthan, based on the dry cellulose ether, c) optionally from 0.05 to 1% by weight of polyacrylamide, based on the dry cellulose ether, and d) optionally further additives, characterized in that additive b) has been metered in as an aqueous solution or as a powder and polyacrylamide c) has been metered in as an aqueous solution to a water-moist cellulose ether having a moisture content in the range from 25% to 75% by weight, based on the weight of the moist cellulose ether, with mixing and optionally further addition of water, and processes for making and using the blends.
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