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    Latex-treated filler slurries for use in papermaking
    6.
    发明申请
    Latex-treated filler slurries for use in papermaking 有权
    用于造纸的乳胶处理填料浆料

    公开(公告)号：US20080302496A1

    公开(公告)日：2008-12-11

    申请号：US12155496

    申请日：2008-06-05

    申请人： Makhlouf Laleg ,  Roderick Collins ,  Danielle Gagne ,  Steven Middleton

    发明人： Makhlouf Laleg ,  Roderick Collins ,  Danielle Gagne ,  Steven Middleton

    IPC分类号： D21H17/37 ,  C08K3/34 ,  C08K3/26 ,  C08K3/30 ,  C08L33/08

    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 (Tg) of the latex used. To efficiently fix the latex the temperature of the filler/latex mixture must be 30-60° C. higher than the Tg 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）在环境温度下加入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使用的胶乳的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点添加到造纸装置中，或者存储以备后用。 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。

    METHODS AND COMPOSITIONS FOR PAPERMAKING
    7.
    发明申请
    METHODS AND COMPOSITIONS FOR PAPERMAKING 失效
    造纸方法和组合物

    公开(公告)号：US20080087396A1

    公开(公告)日：2008-04-17

    申请号：US11838124

    申请日：2007-08-13

    申请人： Yulin Deng ,  Se Yoon ,  Arthur Ragauskas ,  David White

    发明人： Yulin Deng ,  Se Yoon ,  Arthur Ragauskas ,  David White

    IPC分类号： D21H19/54

    CPC分类号： D21H17/69 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/60 ,  C09C1/021 ,  C09C1/025 ,  C09C1/42 ,  D21H17/14 ,  D21H17/28 ,  D21H17/62 ,  D21H17/675 ,  Y10T428/2991

    摘要： The present invention relates to methods for making modified fillers for use in a papermaking process, methods for making a paper using the modified fillers, and modified fillers and paper produced therewith. In one aspect, the present invention provides a method for making a modified filler for use in a papermaking process, which comprises applying a starch composition comprising starch to a reaction composition comprising at least one of fatty acid, rosin acid, and ammonium sulfate to form a reaction mixture; and applying a filler composition comprising a filler to the reaction mixture, whereby forming a modified filler. In another aspect, the present invention provides a method of using a modified filler in a papermaking process, which comprises applying a modified filler to a composition comprising fiber to form a mixture; and processing the mixture, whereby producing a paper.

    摘要翻译： 本发明涉及制造用于造纸工艺的改性填料的方法，使用改性填料制造纸的方法，以及改性填料和由其生产的纸。 一方面，本发明提供了一种制造用于造纸方法的改性填料的方法，其包括将包含淀粉的淀粉组合物施用于包含至少一种脂肪酸，松香酸和硫酸铵的反应组合物中以形成 反应混合物; 以及将包含填料的填料组合物施加到所述反应混合物中，由此形成改性填料。 另一方面，本发明提供了一种在造纸方法中使用改性填料的方法，其包括将改性填料施用于包含纤维的组合物以形成混合物; 并处理混合物，由此生产纸张。

    Grinding alkaline earth metal pigments
    8.
    发明授权
    Grinding alkaline earth metal pigments 失效
    研磨碱土金属颜料

    公开(公告)号：US5533679A

    公开(公告)日：1996-07-09

    申请号：US209006

    申请日：1994-03-10

    申请人： Christopher R. L. Golley

    发明人： Christopher R. L. Golley

    IPC分类号： B01F3/18 ,  C01F11/18 ,  C01F11/46 ,  C09C1/02 ,  C09C3/04 ,  C09D17/00 ,  D21H19/38 ,  D21H21/52 ,  B02C23/18

    CPC分类号： C09C3/041 ,  C01F11/185 ,  C09C1/02 ,  C09C1/021 ,  C09C1/025 ,  C09D17/004 ,  D21H19/385 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/22 ,  D21H21/52

    摘要： There is disclosed a process for producing a finely ground alkaline earth metal pigment. The process comprises the steps of:(a) preparing an aqueous suspension comprising from 40 to 70% by weight of a particulate alkaline earth metal compound, such as calcium carbonate;(b) subjecting the suspension formed in step (a) to attrition grinding with a particulate grinding medium under conditions such as to yield a product having a particle size distribution such that at least 90% by weight of the particles have an equivalent spherical diameter smaller than 2 .mu.m, and preferably at least 80% by weight of the particles have an equivalent spherical diameter smaller than 1 .mu.m; and(c) allowing water to evaporate from the suspension under the action of heat contained in the suspension until the percentage by weight of dry alkaline earth metal compound in the suspension is at least 70% by weight.

    摘要翻译： 公开了一种生产精细研磨的碱土金属颜料的方法。 该方法包括以下步骤：（a）制备含有40-70％重量的碱土金属化合物如碳酸钙的水性悬浮液; （b）使步骤（a）中形成的悬浮液在颗粒研磨介质中进行磨碎研磨，使得产生的颗粒尺寸分布使得至少90重量％的颗粒具有相当的球形直径 小于2μm，优选至少80重量％的颗粒具有小于1μm的当量球形直径; 和（c）允许水在悬浮液中所含的热量作用下从悬浮液中蒸发，直到悬浮液中的干碱土金属化合物的重量百分比为至少70重量％。

    Process for the preparation of calcium sulphate anhydrite and calcium sulphate anhydrite obtained by this process
    9.
    发明授权
    Process for the preparation of calcium sulphate anhydrite and calcium sulphate anhydrite obtained by this process 失效
    通过该方法制备硫酸钙无水石膏和硫酸钙无水石膏的方法

    公开(公告)号：US4387083A

    公开(公告)日：1983-06-07

    申请号：US257475

    申请日：1981-04-24

    申请人： Cornelis A. M. Weterings ,  Johannes A. Janssen

    发明人： Cornelis A. M. Weterings ,  Johannes A. Janssen

    IPC分类号： C01F11/46 ,  C04B11/05 ,  C09C1/02 ,  C01B25/16

    CPC分类号： C04B11/05 ,  C01F11/466 ,  C09C1/025 ,  C01P2004/61 ,  C01P2004/62

    摘要： A process for preparing calcium sulphate anhydrite from calcium sulphate dihydrate so that the calcium sulphate anhydrite crystals will have a predetermined average particle size. The process is conducted by recrystallizing the calcium sulphate dihydrate at moderate temperatures in the presence of sulphuric acid having a concentration of 40-65% wt. calculated relative to the quantity of liquid phase in the recrystallization mixture. The particle size of the final product is controlled by varying the temperature and residence time of the recrystallization mixture in recrystallization zone and by varying the temperature in an inverse relationship to the acid concentration.Calcium sulphate anhydrite crystals having an average particle size between about 0.5 and about 3 micron are produced by maintaining the temperature between about 40.degree. C. and 90.degree. C. and the residence time from about 5 minutes to less than about 30 minutes. Average particle sizes in the range of about 10 to about 20 micron are produced by maintaining the temperature in the range of about 20.degree. C. and about 45.degree. C. and the residence time between about 30 minutes and 3 hours.Anhydrite seed crystals are not supplied in the reactor at the initiation of the recrystallization nor are added to the recrystallization mixture.

    摘要翻译： 从硫酸钙二水合物制备硫酸钙无水石膏的方法，使得硫酸钙无水石膏晶体具有预定的平均粒度。 该方法通过在中等温度下在浓度为40-65％（重量）的硫酸存在下重结晶硫酸钙二水合物进行。 相对于再结晶混合物中液相的量计算。 通过改变重结晶区中的重结晶混合物的温度和停留时间并通过改变与酸浓度成反比关系的温度来控制最终产物的粒度。 通过将温度保持在约40℃至90℃，停留时间为约5分钟至小于约30分钟，产生平均粒度为约0.5微米至约3微米的硫酸钙无水石膏晶体。 通过将温度保持在约20℃和约45℃的范围内并且在约30分钟至3小时之间的停留时间来制备在约10至约20微米范围内的平均粒度。 在重结晶开始时，反应器中不提供无水石膏晶种，也不能加入重结晶混合物中。