A process for treating water to inhibit scale formation
    10.
    发明公开
    A process for treating water to inhibit scale formation 失效
    Verfahren zur Wasserbehandlung zur Verhinderung von Kesselsteinbildung

    公开(公告)号:EP0879793A1

    公开(公告)日:1998-11-25

    申请号:EP98112580.0

    申请日:1994-01-25

    IPC分类号: C02F5/10 C08F222/02

    摘要: Described is a process for treating water to inhibit scale formation, comprising adding to the water an effective amount of a maleate copolymer having a weight average molecular weight of 500 to 7,000, a residual total monomer content of less than 1%, on a maleate copolymer dry weight basis, and comprising at least 50 mole percent of maleate monomer, whereby at least 70 mole percent of the carboxylic acid charge on the maleate monomer is neutralized prior to polymerization, and 10 to 50 mole percent of acrylate monomer.

    摘要翻译: 马来酸酯共聚物包含少于1%的剩余总游离单体,重均分子量为500-7,000。 共聚物包含至少50摩尔%的马来酸酯,10至50摩尔%的丙烯酸酯单体,优选约1至10摩尔%的至少一种非离子共聚单体。 该共聚物可用于抑制水硬度离子在洗涤剂中的沉积,并用作水性浆料中的分散剂。 通过水溶液聚合方法制备共聚物,其包括以下步骤:首先以马来酸酐单体摩尔为基础中和至少70%的马来酸酯单体的电荷,然后缓慢加入至少一种可聚合的共聚单体,以及氧化 自由基引发剂和合适的金属离子还原剂,在80-100℃下在至少3小时内合成,然后加入更多的引发剂。