ADSORPTIVE SILICA FILLER AND ITS MANUFACTURING METHOD AND RESIN COMPOSITION FOR SEALING

摘要

PROBLEM TO BE SOLVED: To provide an adsorptive silica filler which exhibits a low viscosity when compounded with a resin and exhibits good moldability. SOLUTION: The adsorptive silica filler satisfies the following requirements: (a) an average particle size of at least 2.5μm and less than 6μm; (b) a specific surface area of at least 100 m2/g and at most 300 m2/g; and (c) a viscosity of at most 36,000 mPa s as measured at a revolution number of a viscometer of 2.5 rpm at 50°C in the viscosity measurement of a mixture of the adsorptive silica filler with a bisphenol A liquid epoxy resin in a mass ratio of 60:40. The manufacturing method of the adsorptive silica filler is also provided. The resin composition for sealing is obtained by using the adsorptive silica filler. COPYRIGHT: (C)2005,JPO&NCIPI