发明名称 |
ASYMMETRIC OR ELONGATED SILICA-BASED AQUEOUS SOLS |
摘要 |
The invention relates to a sol containing silica-based particles having an axial ratio of at least about 10 and specific surface area of at least about 600 m2/g. The invention further relates to a sol containing silica-based particles having an axial ratio of at least about 10 and S-value up to about 25. The invention further relates to a sol containing silica-based particles having an axial ratio of at least about 10 and a specific surface area of at least about 400 m2/g, wherein the silica-based particles are surface-modified. The invention further relates to a sol containing silica-based particles having a viscosity of at least 50 cP and silica content of at least about 3 % by weight, wherein the silica-based particles have a specific surface area of at least about 400 m2/g. The invention further relates to a process for producing the aqueous silica-based sol according to the invention, a sol containing silica-based particles obtainable by the process, use of the sol containing silica- based particles as a flocculating agent. The invention further relates to a process for producing paper in which the sol containing silica-based particles is used as a drainage and retention aid.. |
申请公布号 |
CA2691343(C) |
申请公布日期 |
2014.10.07 |
申请号 |
CA20082691343 |
申请日期 |
2008.06.04 |
申请人 |
AKZO NOBEL N.V. |
发明人 |
PERSSON, MICHAEL;HANSSON, FREDDIE;PAL, ANNIKA VIOLA;LINDAHL, LARS;CARLEN, JOAKIM |
分类号 |
C01B33/143;C01B33/14;C01B33/141;C02F1/52;D21H17/68 |
主分类号 |
C01B33/143 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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