Patent ID: 6395807
Filing Date: 2002-05-28
Classification: C01P,C04B,C08K,C09C,H01L

Abstract:
A fine spherical silica having a particle size distribution in which a maximum particle diameter is 24 &mgr;m, an average particle diameter is 1.7 to 7 &mgr;m, and a proportion X1 of particles having a particle diameter of 3 &mgr;m or less in the total particles is in a rage from 100/D50 wt % to (18+100/D50) wt %, characterized in that viscosity at 50Â° C. of a mixture obtained by blending a maximum of 80 wt % in terms of the total weight amount of the fine spherical silica with an epoxy resin or silicone resin which is liquid at room temperature is 20 PaÂ·s or less.