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发明公开
CN106632859A 一种淀粉接枝物混凝土增稠剂的制备方法 无效 - 撤回

一种淀粉接枝物混凝土增稠剂的制备方法
摘要：
本发明公开了一种淀粉接枝物混凝土增稠剂的制备方法，采用如下步骤制备：1)将淀粉糊化后在引发剂A作用下，得到淀粉自由基；2)将淀粉自由基、不饱和酰胺小单体、不饱和磺酸类小单体在引发剂B和还原剂体系共同作用下进行水相自由基聚合得到共聚产物；3)反应完成后用乙醇洗涤，抽滤，干燥，用碱液调整PH为6～7，加水得到质量百分比浓度为10～20％的淀粉接枝物混凝土增稠剂。本发明方法效率高，操作简单。用本发明制备的淀粉接枝物混凝土增稠剂能显著提高混凝土的保水性能，解决混凝土离析、泌水问题，产品性能稳定。
摘要（英）：

The invention discloses a preparation method of a starch grafting concrete thickener. The preparation method comprises the following steps: 1) pasting starch and obtaining a starch free radical under the effect of an initiator A; 2) performing water-phase free radical polymerization of the starch free radical, unsaturated amide small monomer and unsaturated sulfonic acid small monomer under the joint effect of an initiator B and a reducing agent system to obtain a copolymerization product; and 3) after reaction, washing with ethanol, performing suction filtration, drying, adjusting the pH to 6-7 with alkali liquor, and adding water to obtain a starch grafting concrete thickener with concentration of 10-20% by mass. The method disclosed by the invention has high efficiency and is easy to operate. The starch grafting concrete thickener prepared in the invention can remarkably improve the water retention capacity of concrete, and solves the problems of disintegration and bleeding of concrete while the product performance is stable.

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