Composite particle aqueous suspension and process for producing same
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United States of America Patent
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Mar 30, 1999
Grant Date -
N/A
app pub date -
Feb 7, 1997
filing date -
Feb 9, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A stable aqueous suspension of composite particles each including a core formed from a solid or liquid particle and a coating layer formed on the core particle and including at least one high molecular weight surfactant compound having an average molecular weight of 1100 or more and at least one low molecular weight surfactant compound having an average molecular weight of 1100 or less and at least 400 below the average molecular weight of the high molecular weight surfactant compound and optionally a suspension stabilizer, is produced by subjecting a particulate solid substance or a liquid substance to a suspending treatment in an aqueous medium containing the above-mentioned high and low molecular weight surfactant compounds, and optionally the suspension stabilizer.
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