发明授权
- 专利标题： Optically variable pigments having an asymmetrical layer structure
- 专利标题（中）： 具有不对称层结构的光学可变颜料
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申请号： US10533575申请日： 2003-11-12
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公开(公告)号： US07374609B2公开(公告)日： 2008-05-20
- 发明人: Patrice Bujard , Philippe Bugnon
- 申请人： Patrice Bujard , Philippe Bugnon
- 申请人地址： US NY Tarrytown
- 专利权人： Ciba Specialty Chemicals Corporation
- 当前专利权人： Ciba Specialty Chemicals Corporation
- 当前专利权人地址： US NY Tarrytown
- 代理商 Joseph C. Suhadolnik
- 优先权： EP02406007 20021121
- 国际申请： PCT/EP03/50817 WO 20031112
- 国际公布： WO2004/046254 WO 20040603
- 主分类号： C09D11/00
- IPC分类号： C09D11/00
摘要：
The present invention relates to pigments whose particles have a length of from 2 μm to 5 mm, a width of from 2 μm to 2 mm and a thickness of from 50 nm to 1.5 μm and a ratio of length to thickness of at least 2:1, the particles having a core of a metallically reflecting material having two substantially parallel faces, the distance between which is the shortest axis of the core, comprising (a), optionally, on one parallel face of the core, an SiOy layer wherein 0.95
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