发明申请
US20050255027A1 Method for producing alkaline earth metal carbonate crystal and alkaline earth metal carbonate crystal
审中-公开
碱土金属碳酸盐晶体和碱土金属碳酸盐晶体的制造方法
- 专利标题： Method for producing alkaline earth metal carbonate crystal and alkaline earth metal carbonate crystal
- 专利标题（中）： 碱土金属碳酸盐晶体和碱土金属碳酸盐晶体的制造方法
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申请号： US11107925申请日： 2005-04-18
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公开(公告)号： US20050255027A1公开(公告)日： 2005-11-17
- 发明人: Hiroyuki Hirai , Keiko Sugihara
- 申请人： Hiroyuki Hirai , Keiko Sugihara
- 申请人地址： JP Minami-ashigara-shi 250-0193
- 专利权人： Fuji Photo Film Co., Ltd.
- 当前专利权人： Fuji Photo Film Co., Ltd.
- 当前专利权人地址： JP Minami-ashigara-shi 250-0193
- 优先权： JP2004-123657 20040420
- 主分类号： C01F11/18
- IPC分类号： C01F11/18 ; C08K3/26 ; C08K9/04 ; C08L69/00 ; C09C1/02 ; C09C3/12
摘要：
A method for producing an alkaline earth metal carbonate crystal comprising allowing an alkaline earth metal ion that is present at an ion concentration of 0.5 mol/L or less and a carbonate ion to react under an alkali condition to generate an alkaline earth metal carbonate crystal having an aspect ratio of 1.5 or more. An alkaline earth metal carbonate crystal produced by the method is preferably blended with an optical resin and can sufficiently reduce the birefringence and prevent deterioration of the original optical resin.