Silica sols in papermaking
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United States of America Patent
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Jul 1, 1997
Issued Date -
N/A
app pub date -
Jun 27, 1994
filing date -
Nov 9, 1989
priority date (Note) -
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Abstract
Silica sols having a high content of microgel and aluminum modified particles with high specific surface area. The sols can be prepared by a process comprising acidification of a water glass solution, alkalization at a certain dry substance content, particle growth and aluminum modification. The sols are particularly suitable for use as additives, in combination with cationic polymers, in papermaking.
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