Invention Grant
- Patent Title: Controllable filler prefloculation using a dual polymer system
- Patent Title (中): 使用双重聚合物系统的可控填料预处理
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Application No.: US11854044Application Date: 2007-09-12
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Publication No.: US08172983B2Publication Date: 2012-05-08
- Inventor: Weiguo Cheng , Ross T. Gray
- Applicant: Weiguo Cheng , Ross T. Gray
- Applicant Address: US IL Naperville
- Assignee: Nalco Company
- Current Assignee: Nalco Company
- Current Assignee Address: US IL Naperville
- Agent Benjamin E. Carlsen; Michael B. Martin
- Main IPC: D21H17/33
- IPC: D21H17/33 ; D21H17/63 ; D21H17/67 ; C09C1/02 ; C09C1/42 ; C09C3/00
Abstract:
A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises sequential addition of high and low molecular weight flocculating agents to an aqueous dispersion of filler particles followed by shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution.
Public/Granted literature
- US20090065162A1 CONTROLLABLE FILLER PREFLOCULATION USING A DUAL POLYMER SYSTEM Public/Granted day:2009-03-12
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