Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Solid polycarboxylate superplasticizer and preparation method thereof
The invention provides a solid polycarboxylate superplasticizer and a preparation method thereof.The preparation method comprises the steps that firstly, a polyether macromonomer, water, an active exciting agent and an oxidizing agent are mixed to serve as a base material; then taking an unsaturated carboxylic acid monomer as a material A and an aqueous solution of a chain transfer agent and a reducing agent as a material B, simultaneously dropwise adding the material A and the material B into the base material under a heating condition, after dropwise adding is finished, carrying out a heat preservation reaction, and adding caustic soda flakes for neutralization to obtain a polycarboxylate superplasticizer mother solution; transferring the polycarboxylate superplasticizer mother liquor into a primary devolatilization device, and devolatilizing under a heating condition; transferring into a secondary mixing device, and adding a drying agent; and finally transferring into a slicing device to obtain a solid polycarboxylic acid water reducer finished product with the water content of less than 3% and the solid content of more than 97%. Compared with the prior art, the preparation method is simple, the production energy consumption is low, and the product performance is excellent.
本发明提供了一种固体聚羧酸减水剂及其制备方法，首先，将聚醚大单体、水、活性激发剂和氧化剂混合，作为底料；然后不饱和羧酸类单体作为A料，链转移剂和还原剂的水溶液作为B料，加热条件下，A料和B料同时滴加到底料中，滴加结束后保温反应，加入片碱中和，得到聚羧酸减水剂母液；然后将聚羧酸减水剂母液转入一级脱挥装置，加热条件下脱挥；然后转入二级混合装置，加入干燥剂；最后转入切片装置，得到固体聚羧酸减水剂成品，含水率＜3％，聚羧酸减水剂固含＞97％。与现有技术相比，本发明制备方法简单，生产能耗较低、产品性能优异。
Solid polycarboxylate superplasticizer and preparation method thereof
The invention provides a solid polycarboxylate superplasticizer and a preparation method thereof.The preparation method comprises the steps that firstly, a polyether macromonomer, water, an active exciting agent and an oxidizing agent are mixed to serve as a base material; then taking an unsaturated carboxylic acid monomer as a material A and an aqueous solution of a chain transfer agent and a reducing agent as a material B, simultaneously dropwise adding the material A and the material B into the base material under a heating condition, after dropwise adding is finished, carrying out a heat preservation reaction, and adding caustic soda flakes for neutralization to obtain a polycarboxylate superplasticizer mother solution; transferring the polycarboxylate superplasticizer mother liquor into a primary devolatilization device, and devolatilizing under a heating condition; transferring into a secondary mixing device, and adding a drying agent; and finally transferring into a slicing device to obtain a solid polycarboxylic acid water reducer finished product with the water content of less than 3% and the solid content of more than 97%. Compared with the prior art, the preparation method is simple, the production energy consumption is low, and the product performance is excellent.
本发明提供了一种固体聚羧酸减水剂及其制备方法，首先，将聚醚大单体、水、活性激发剂和氧化剂混合，作为底料；然后不饱和羧酸类单体作为A料，链转移剂和还原剂的水溶液作为B料，加热条件下，A料和B料同时滴加到底料中，滴加结束后保温反应，加入片碱中和，得到聚羧酸减水剂母液；然后将聚羧酸减水剂母液转入一级脱挥装置，加热条件下脱挥；然后转入二级混合装置，加入干燥剂；最后转入切片装置，得到固体聚羧酸减水剂成品，含水率＜3％，聚羧酸减水剂固含＞97％。与现有技术相比，本发明制备方法简单，生产能耗较低、产品性能优异。
Solid polycarboxylate superplasticizer and preparation method thereof
一种固体聚羧酸减水剂及其制备方法
FAN SHIMIN (Autor:in) / CHEN FENG (Autor:in) / ZENG JUN (Autor:in) / PAN YUJIE (Autor:in) / MA XINYUE (Autor:in)
23.06.2023
Patent
Elektronische Ressource
Chinesisch
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