发明授权
- 专利标题: Silica sols and use of the sols
- 专利标题(中): 二氧化硅溶胶和溶胶的使用
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申请号: US379630申请日: 1995-02-03
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公开(公告)号: US5603805A公开(公告)日: 1997-02-18
- 发明人: Kjell Andersson , Bo Larsson , Erik Lindgren
- 申请人: Kjell Andersson , Bo Larsson , Erik Lindgren
- 申请人地址: SEX Bohus
- 专利权人: Eka Nobel, AB
- 当前专利权人: Eka Nobel, AB
- 当前专利权人地址: SEX Bohus
- 优先权: SEX9202502 19920831
- 主分类号: C01B33/14
- IPC分类号: C01B33/14 ; C01B33/143 ; C01B33/146 ; C01B33/149 ; D21F11/00 ; D21H17/13 ; D21H17/37 ; D21H17/45 ; D21H17/67 ; D21H17/68 ; D21H21/10
摘要:
Silica sols with a high content of microgel and particles with a specific surface area within the range 300 to 700 m.sup.2 /g, preferably 400 to 650 m.sup.2 /g. The sols can be prepared by acidification or a water glass solution and alkalization at a certain dry content, alternatively to a certain pH. The sols are particularly suitable for use as additives in papermaking in combination with cationic polymers and especially in combination with cationic acrylamide based polymers.
公开/授权文献
- US6049074A Photoelectric conversion device 公开/授权日:2000-04-11
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