Non-porous spherical silica and method for production thereof
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United States of America Patent
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Jul 4, 2006
Grant Date -
Oct 9, 2003
app pub date -
Sep 26, 2001
filing date -
Sep 27, 2000
priority date (Note) -
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Abstract
Non-porous spherical silica having a mean particle diameter of 0.1 20 .mu.m and satisfying the following conditions: (a) a maximum particle diameter is 4 times the mean particle diameter or less; (b) .eta.1/.eta.2<1.0, wherein .eta.1 and .eta.2 are the viscosity of a 70:30 (by weight) mixture of the non-porous spherical silica and a Bisphenol A type liquid epoxy resin, as measured at a rotation number of 0.5 rpm and 2.5 rpm, respectively, in a viscometer.
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