Papermaking process
    1.
    发明授权
    Papermaking process 失效
    造纸过程

    公开(公告)号:US4961825A

    公开(公告)日:1990-10-09

    申请号:US411241

    申请日:1989-09-22

    摘要: In the production of paper or pulp sheets from a paper stock, a binder is added which comprises cationic and anionic components to improve the paper characteristics and the stock characteristics, such that increased retention and a more readily dewatered stock are obtained.The anionic component consists of colloidal anionic particles having at least one surface layer of aluminum silicate or aluminum-modified silicic acid, such that the surface groups of the particles contain silicium and aluminum atoms in a ratio of from 9.5:0.5 to 7.5:2.5.The cationic component consists of cationic carbohydrate having a degree of substitution of 0.01-1.0.

    摘要翻译: 在从纸料制造纸或纸浆片材中,添加包含阳离子和阴离子组分的粘合剂以改善纸张特性和储存特性,从而获得增加的保留量和更容易脱水的原料。 阴离子组分由具有至少一个硅酸铝表面层或铝改性硅酸的胶体阴离子颗粒组成,使得颗粒的表面基团含有比例为9.5:0.5至7.5:2.5的硅和铝原子。 阳离子组分由取代度为0.01-1.0的阳离子碳水化合物组成。

    Silica sols, a process for the production of silica sols and use of the
sols
    2.
    发明授权
    Silica sols, a process for the production of silica sols and use of the sols 失效
    二氧化硅溶胶,二氧化硅溶胶的生产工艺和溶胶的使用

    公开(公告)号:US5447604A

    公开(公告)日:1995-09-05

    申请号:US855649

    申请日:1992-05-08

    CPC分类号: D21H17/68 C01B33/1485

    摘要: Silica sols which have a large alkali excess, i.e. a low molar ratio SiO.sub.2 to M.sub.2 O, and which contain silica particles with a high specific surface area. The silica sols can be prepared through acidification of a water glass solution and subsequent alkalization of the acid sol to the molar ratio in question. The sols are particularly suitable for use as additives, in combination with cationic polymers, in papermaking.

    摘要翻译: PCT No.PCT / SE90 / 00690 Sec。 371日期:1992年5月8日 102(e)日期1992年5月8日PCT提交1990年10月24日PCT公布。 公开号WO91 / 07351 日期1991年5月30日。具有大量碱过量的硅溶胶,即SiO 2与M 2 O的摩尔比低,并且含有具有高比表面积的二氧化硅颗粒。 二氧化硅溶胶可以通过水玻璃溶液的酸化和酸溶胶的碱化至所讨论的摩尔比来制备。 该溶胶特别适用于在造纸中作为添加剂与阳离子聚合物的组合使用。