发明授权
- 专利标题： Process for water based mineral material slurry surface whitening
- 专利标题（中）： 水性矿物材料浆料表面美白工艺
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申请号： US13996719申请日： 2011-12-22
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公开(公告)号： US09556320B2公开(公告)日： 2017-01-31
- 发明人: Matthias Buri , Samuel Rentsch , Claudia Pudack
- 申请人： Matthias Buri , Samuel Rentsch , Claudia Pudack
- 申请人地址： CH Oftringen
- 专利权人： Omya International AG
- 当前专利权人： Omya International AG
- 当前专利权人地址： CH Oftringen
- 代理机构： Amster, Rothstein & Ebenstein LLP
- 优先权： WOPCT/EP2011/050187 20110107
- 国际申请： PCT/EP2011/073801 WO 20111222
- 国际公布： WO2012/093039 WO 20120712
- 主分类号： C08K3/26
- IPC分类号： C08K3/26 ; C08K3/00 ; C09C1/02 ; C09C1/36 ; C09C1/40 ; C09C1/42 ; C09C3/10 ; D21H17/00 ; G01N21/25 ; C08L33/02 ; G06K9/62
摘要：
The present invention is directed to a process for surface whitening mineral matter in a slurry that includes the following steps: (a) preparing by dispersing and/or grinding at least one water based mineral matter slurry; and (b) adding during and/or after step a) 0.005 wt % to 0.5 wt %, based on dry weight of the mineral matter, of at least one alkylene oxide block co-polymer or at least one alkylene oxide random co-polymer.
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