发明名称 |
Controllable filler prefloculation using a dual polymer system |
摘要 |
A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises sequential addition of a first flocculating agent to an aqueous dispersion of filler particles followed by shearing of the dispersion, followed by addition of a second flocculating agent to the dispersion and further shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution. In addition, a neutralizing coagulant can be added to the dispersion to partially or completely neutralize the charge of the filler before the first flocculating agent is added. |
申请公布号 |
US8088213(B2) |
申请公布日期 |
2012.01.03 |
申请号 |
US20090431356 |
申请日期 |
2009.04.28 |
申请人 |
CHENG WEIGUO;GRAY ROSS T.;NALCO COMPANY |
发明人 |
CHENG WEIGUO;GRAY ROSS T. |
分类号 |
C09C3/00;C09C1/02;C09C1/42 |
主分类号 |
C09C3/00 |
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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