发明授权
- 专利标题: Core-shell-type cerium oxide microparticle, dispersion solution comprising the microparticle, and process for production of the microparticle or dispersion solution
- 专利标题(中): 核壳型氧化铈微粒,包含微粒的分散液,以及微粒或分散液的制造方法
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申请号: US12444799申请日: 2007-10-09
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公开(公告)号: US09216305B2公开(公告)日: 2015-12-22
- 发明人: Noriya Izu , Ichiro Matsubara , Woosuck Shin , Toshio Itoh
- 申请人: Noriya Izu , Ichiro Matsubara , Woosuck Shin , Toshio Itoh
- 申请人地址: JP Tokyo
- 专利权人: National Institute of Advanced Industrial Science and Technology
- 当前专利权人: National Institute of Advanced Industrial Science and Technology
- 当前专利权人地址: JP Tokyo
- 代理机构: Canady + Lortz LLP
- 代理商 Suzannah K. Sundby, Esq.
- 优先权: JP2006-276871 20061010; JP2007-262578 20071005
- 国际申请: PCT/JP2007/069708 WO 20071009
- 国际公布: WO2008/044685 WO 20080417
- 主分类号: C01F1/00
- IPC分类号: C01F1/00 ; A61Q17/04 ; A61K8/02 ; A61K8/11 ; A61K8/19 ; A61K8/73 ; A61K8/81 ; B01J13/14 ; B82Y30/00 ; C01F17/00
摘要:
An object of the present invention is to provide a core-shell-type cerium oxide microparticle, a dispersion solution comprising the microparticle, and a process for production of the microparticle or dispersion solution, and to achieve the object, the present invention provides a core-shell-type cerium oxide microparticle which has an average particle diameter of 30 to 200 nm and a coefficient of variation therein no greater than 0.25, and in which the secondary particle forming the core portion is spherical in shape and a polymer is attached to its surface, a dispersion solution of this cerium oxide microparticle and a dry powder from the cerium oxide microparticle dispersion solution, and a process of producing a core-shell-type cerium oxide microparticle or a dispersion solution thereof, which comprises the steps of: mixing a cerium salt and a polymer in an organic solvent to obtain a mixture; and heating this mixture under reflux at a prescribed temperature to precipitate core-shell-type cerium oxide microparticles, wherein the cerium salt is cerium nitrate and the particle diameter of the microparticles is adjusted using the molecular weight of the polymer.