Process for modifying hydrophilic polymers
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United States of America Patent
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Oct 9, 2001
Issued Date -
N/A
app pub date -
Apr 21, 1994
filing date -
Sep 18, 1991
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Abstract
The present invention relates to a process for modifying hydrophilic polymers by mixing with a modifier, characterized in that the pulverulent polymer and the modifier are introduced continuously into a vertical, cylindrical mixer, mixed at a power of from 1,000 to 5,000 Wh/m.sup.3 of powder by means of rotating blades at a blade rate of from 100 to 300 s.sup.-1 at a residence time of 1-10 seconds, during which the powder is passed through zones having energy dissipation densities of 300-600 W/l of mixer volume.
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