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公开(公告)号:EP3081531A1
公开(公告)日:2016-10-19
申请号:EP14870123.8
申请日:2014-12-11
发明人: YOSHITAKE, Keiko , UMEDA, Ai , KIKUNAGA, Ichitaro
IPC分类号: C01B33/18 , C01B33/145
CPC分类号: C01B33/1417 , C01B33/145 , C01B33/18 , C01P2004/04 , C01P2004/54 , C01P2004/64 , C01P2006/80
摘要: Silica particles for which an alkoxy silane serves as the raw material, and which fulfill the following conditions (a)-(c). (a) The content of alkali metal elements is at most 5ppm relative to silica solids. (b) The moisture absorption at 50% relative humidity is at most 0.25mg/m 2 , and the refractive index measured by liquid immersion is 1.450-1.460. (c) The mean primary particle diameter as calculated from the specific surface area measured by nitrogen adsorption is 10-100nm.