Patent ID: 6495257
Filing Date: 2002-12-17
Classification: C01B,Y10T

Abstract:
Fine particulate silica gel having the following characteristics (1) to (5):(1) average particle size: from 1 to 200 &mgr;m; (2) oil absorption in accordance with JIS K5101: from 100 to 300 ml/100 g; (3) hygroscopicity represented by moisture adsorption under a relative humidity of 90% at 25Â° C. in accordance with JIS Z0701: not more than 20 wt %; (4) spherical particle shape; and (5) average value of mechanical strengths of particles having particle sizes of from 2 to 10 &mgr;m is from 0.1 to 1.0 kgf/mm2.