Inorganic particle materials and their manufacturing methods, as well as resin compositions

Abstract

The problem to be solved is to provide an inorganic particle material that suppresses the reduction in curing speed when applied to resin compositions, a method for manufacturing the same, and a resin composition thereof. The inorganic particle material of the present invention, which solves the above problem, has an alkaline earth metal ion concentration of 20 ppm or less, as measured by the following measurement method. The volume average particle size of the aforementioned inorganic particle material is 0.01 μm or more and 100 μm or less. The aforementioned inorganic particle material is mainly composed of titanate compounds. Since it is understood that the dissolution of alkaline earth metal ions will adversely affect the curing catalyst that cures the resin material, the reduction in curing speed when applied to resin compositions can be suppressed by limiting the amount of alkaline earth metal ions. (Measurement of alkaline earth metal ion concentration) After heating a mixture of 8 g of sample and 80 g of ion-exchanged water at 95°C for 20 hours, the concentration of alkaline earth metal ions in the separated supernatant is measured by ion chromatography.

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