发明授权
US07083770B2 Amorphous, fine silica particles, and method for their production and their use
失效
无定形,细二氧化硅颗粒及其制备方法及其用途
- 专利标题: Amorphous, fine silica particles, and method for their production and their use
- 专利标题(中): 无定形,细二氧化硅颗粒及其制备方法及其用途
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申请号: US10049902申请日: 2001-06-20
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公开(公告)号: US07083770B2公开(公告)日: 2006-08-01
- 发明人: Takeyoshi Shibasaki , Kazuyoshi Honda , Masamichi Murota , Hirokuni Shirono
- 申请人: Takeyoshi Shibasaki , Kazuyoshi Honda , Masamichi Murota , Hirokuni Shirono
- 申请人地址: JP Tokyo
- 专利权人: Nippon Aerosil Co., Ltd.
- 当前专利权人: Nippon Aerosil Co., Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
- 优先权: JP2000-184160 20000620; JP2000-348537 20001115
- 国际申请: PCT/JP01/05252 WO 20010620
- 国际公布: WO01/98211 WO 20011227
- 主分类号: C01B33/18
- IPC分类号: C01B33/18 ; C08K3/36
摘要:
The amorphous-silica particle having 0.1–0.7 μm of the average particle diameter, 5–30 m2/g of the specific surface area, less than 40% of the dispersion coefficient, and 20 μC/m2 of the absolute value of the triboelectrostatic charge, can be obtained, by setting flame temperature to more than melting point of silica, raising the silica concentration in a flame, and staying the generated silica particle in the flame for a short time to be grew up. Since this silica particle has a particle shape being near a true sphere, and a particle size of said particle is remarkably uniform, so it is suitable for a filler of a semiconductor sealing agent or various materials, etc. In addition, since said particle has strong electrification, it is also suitable for an outer or an inner additional agent of a toner for an electronic photograph, a photo conductor material for a electronic photograph, and a material of an electric charge transportation layer, etc.