Method for dissolving cationic starch, papermaking agent and its use
    15.
    发明授权
    Method for dissolving cationic starch, papermaking agent and its use 有权
    溶解阳离子淀粉,造纸剂及其用途的方法

    公开(公告)号:US09580865B2

    公开(公告)日:2017-02-28

    申请号:US14387369

    申请日:2013-03-22

    申请人: KEMIRA OYJ

    摘要: The invention relates to a method for dissolving cationic starch. In the method is obtained an aqueous polyelectrolyte solution comprising a synthetic cationic polymer, which has a charge density value of at least 0.1 meq/g, determined at pH3, the concentration of the cationic polymer in the polyelectrolyte solution being >2.5 weight-%, and the aqueous polyelectrolyte solution is brought together with cationic starch having a degree of substitution, DS, >0.1. The cationic starch is dissolved to the polyelectrolyte solution by heating and/or mixing. The invention relates also to a papermaking agent comprising 2-40 weight-% of synthetic cationic polymer which has a charge density value of at least 0.1 meq/g, determined at p H 3, and 2.5-25 weight-% cationic starch having degree of substitution, DS, >0.1. The papermaking agent is in slurry form and has a viscosity of 50-20 000 m Pas, measured at 25° C. with Brookfield DVI+ viscometer.

    摘要翻译: 本发明涉及一种溶解阳离子淀粉的方法。 在该方法中,获得包含合成阳离子聚合物的水溶液聚电解质溶液,该聚合物的电荷密度值至少为0.1meq / g,在pH3下测定,阳离子聚合物在聚电解质溶液中的浓度> 2.5重量% 并且将聚合电解质水溶液与具有取代度DS'> 0.1的阳离子淀粉一起使用。 通过加热和/或混合将阳离子淀粉溶解到聚电解质溶液中。 本发明还涉及一种造纸剂,其包含2-40重量%的合成阳离子聚合物,其电荷密度值至少为0.1meq / g,在p H 3和2.5-25重量%阳离子淀粉具有度 的替代,DS,> 0.1。 造纸剂为浆液形式,并且在25℃下用Brookfield DVI +粘度计测量粘度为50-20,000mPa·s。