Hydrogels absorbing aqueous fluids
    8.
    发明授权
    Hydrogels absorbing aqueous fluids 有权
    吸水剂的水凝胶

    公开(公告)号:US08552071B1

    公开(公告)日:2013-10-08

    申请号:US09831915

    申请日:1999-11-18

    摘要: The invention relates to hydrogels capable of absorbing aqueous fluids, which hydrogels are produced by polymerization of olefinically unsaturated carboxylic acids or their derivatives. The hydrogels are characterized in that before, during or after the polymerization reaction and before drying a silicic acid alkali salt of the general formula (I) M2O×nSiO2 is added to the polymerization reaction mixture. In said formula M is an alkali metal and n is a number between 0.5 and 4. The hydrogel obtained in this way is then dried at an elevated temperature. The invention also relates to a method for producing said hydrogels and to their use for absorbing aqueous fluids.

    摘要翻译: 本发明涉及能够吸收含水流体的水凝胶,该水凝胶是通过烯属不饱和羧酸或其衍生物的聚合制备的。 水凝胶的特征在于,在聚合反应之前,之中或之后,在干燥之前,将通式(I)的M 2 O x nSiO 2的硅酸碱金属盐加入到聚合反应混合物中。 在所述式中,M是碱金属,n是0.5-4之间的数。然后在升高的温度下将这样得到的水凝胶干燥。 本发明还涉及一种生产所述水凝胶的方法及其用于吸收含水流体的用途。