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1. 发明申请

WO2008148204A1 LATEX-TREATED FILLER SLURRIES FOR USE IN PAPERMAKING 审中-公开
标题翻译：用于造纸的LATEX-TREATED FILLER流浆
公开(公告)号：WO2008148204A1
公开(公告)日：2008-12-11
申请号：PCT/CA2008/001078
申请日：2008-06-04
申请人： FPINNOVATIONS , LALEG, Makhlouf , COLLINS, Roderick , GAGNE, Danielle , MIDDLETON, Steven
发明人： LALEG, Makhlouf , COLLINS, Roderick , GAGNE, Danielle , MIDDLETON, Steven
IPC分类号： D21H17/69 , D21H17/67 , D21H21/14
CPC分类号： D21H17/67 , C01P2004/03 , C01P2004/61 , C01P2004/62 , C09C1/021 , C09C1/025 , C09C1/42 , D21H17/35 , D21H17/37 , D21H17/675 , D21H17/68 , D21H17/69 , D21H23/04 , Y10T428/2998
摘要： A continuous filler treatment process has been developed to enhance the fixation of anionic latex on filler in a short time. In this process anionic polymer dispersions (latex) are added to common papermaking filler slurries at ambient temperature and then mixed with water of temperature higher than the glass transition temperature (T g ) of the latex used. To efficiently fix the latex the temperature of the filler/latex mixture must be 30-60°C higher than the T g of the latex used. The chemical composition of the resin and the type of surfactant used during the emulsion polymerisation process of the polymer latex dispersions are important factors for efficiently fixing the latex onto the filler by adding hot water and improving the properties of paper made with the treated filler. The enhanced fixation of anionic latex onto filler using hot water is done in mixing vessels that can control shear and mixing time. The anionic latexes applied by this process are totally and irreversibly fixed or bound onto the filler particles and the aggregated filler slurry is stable over time. The latex-treated filler slurry can be added to papermaking furnishes at any point prior to the headbox of the paper machine or stored for later use. It can be added to wood-free or wood-containing furnishes commonly used for making fine papers, mechanical pulp papers, and multi-ply paperboards. The latex-treated filler slurry improves filler retention, only slightly reduces sheet strength and improves sizing performance. Furthermore, latex-treated calcium carbonate filler, such as precipitated calcium carbonate (PCC), is more acid-resistant and, when used in manufacturing mechanical pulp paper under neutral conditions, less acid is needed to control the pH.
摘要翻译：已经开发了连续的填料处理方法，以在短时间内增强阴离子胶乳在填料上的固定。在这个过程中，将阴离子聚合物分散体（胶乳）在环境温度下添加到普通的造纸填料浆料中，然后与高于所用胶乳的玻璃化转变温度（Tg）的温度的水混合。为了有效地固定胶乳，填料/胶乳混合物的温度必须比所用胶乳的Tg高30-60℃。树脂的化学成分和在聚合物胶乳分散体的乳液聚合过程中使用的表面活性剂的类型是通过加入热水和改进用经处理的填料制备的纸的性能来有效地将胶乳固定到填料上的重要因素。使用热水将阴离子胶乳固定在填料上进行，可以控制剪切和混合时间的混合容器。通过该方法施加的阴离子胶乳完全和不可逆地固定或结合到填料颗粒上，并且聚集的填料浆料随时间稳定。胶乳处理的填料浆料可以在造纸机的流浆箱之前的任何时间添加到造纸装置中，或者储存以备后用。它可以添加到通常用于制造高级纸张，机械纸浆纸和多层纸板的无木材或含木材的配料中。胶乳处理的填料浆料改善了填料保留性，仅稍微降低了片材强度并提高了施胶性能。此外，胶乳处理的碳酸钙填料，例如沉淀碳酸钙（PCC），更耐酸，并且当在中性条件下用于制造机械纸浆时，需要较少的酸来控制pH。

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