A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Polycarboxylate superplasticizer mother liquor and preparation method thereof
The invention discloses a polycarboxylate superplasticizer mother liquor and a preparation method thereof, the polycarboxylate superplasticizer mother liquor comprises the following production raw materials by weight: 280-350 parts of unsaturated polyoxyethylene ether macromonomer, 10-40 parts of unsaturated carboxylic acid or unsaturated carboxylic ester micromonomer, 1-3 parts of an initiator, 0.4-1 part of a reducing agent, 0.8-1.8 parts of a chain transfer agent, and 1-5 parts of a neutralizing material. And 100 to 700 parts of deionized water. The preparation method comprises the following steps: adding unsaturated acid and unsaturated ester into a reaction kettle for prepolymerization before dropwise adding in mother liquor synthesis production, generating a part of polycarboxylate superplasticizer molecules with larger molecular weight in advance, and then dropwise adding the rest unsaturated acid, unsaturated ester and unsaturated sulfonate into the reaction kettle for synthesis. According to the method, the synthesized mother liquor mainly contains two polycarboxylic acid comb chains with ester functional groups and different molecular chain lengths, a stepped hydrolysis speed is generated in concrete, and anion adsorption groups are continuously and uniformly provided, so that the slump retaining property is improved.
本发明公开了一种聚羧酸减水剂母液及其制备方法,所述聚羧酸减水剂母液的生产原料按重量计包括不饱和聚氧乙烯醚大单体280‑350份，不饱和羧酸或不饱和羧酸酯小单体10‑40份，引发剂1‑3份，还原剂0.4‑1份，链转移剂0.8‑1.8份，中和料1‑5份，去离子水100‑700份。其制备方法通过在母液合成生产滴加前先向反应釜内加入不饱和酸及不饱和酯进行预聚合，提前生成一部分分子量较大的聚羧酸减水剂分子，随后将剩余的不饱和酸、不饱和酯及不饱和磺酸盐再通过滴加入反应釜进行合成，可使合成的母液中主要含有两种带有酯类官能团不同分子链长度的聚羧酸梳形链，在混凝土中产生阶梯式的水解速度，持续均匀提供阴离子吸附基团，从而提高保坍性能。
Polycarboxylate superplasticizer mother liquor and preparation method thereof
The invention discloses a polycarboxylate superplasticizer mother liquor and a preparation method thereof, the polycarboxylate superplasticizer mother liquor comprises the following production raw materials by weight: 280-350 parts of unsaturated polyoxyethylene ether macromonomer, 10-40 parts of unsaturated carboxylic acid or unsaturated carboxylic ester micromonomer, 1-3 parts of an initiator, 0.4-1 part of a reducing agent, 0.8-1.8 parts of a chain transfer agent, and 1-5 parts of a neutralizing material. And 100 to 700 parts of deionized water. The preparation method comprises the following steps: adding unsaturated acid and unsaturated ester into a reaction kettle for prepolymerization before dropwise adding in mother liquor synthesis production, generating a part of polycarboxylate superplasticizer molecules with larger molecular weight in advance, and then dropwise adding the rest unsaturated acid, unsaturated ester and unsaturated sulfonate into the reaction kettle for synthesis. According to the method, the synthesized mother liquor mainly contains two polycarboxylic acid comb chains with ester functional groups and different molecular chain lengths, a stepped hydrolysis speed is generated in concrete, and anion adsorption groups are continuously and uniformly provided, so that the slump retaining property is improved.
本发明公开了一种聚羧酸减水剂母液及其制备方法,所述聚羧酸减水剂母液的生产原料按重量计包括不饱和聚氧乙烯醚大单体280‑350份，不饱和羧酸或不饱和羧酸酯小单体10‑40份，引发剂1‑3份，还原剂0.4‑1份，链转移剂0.8‑1.8份，中和料1‑5份，去离子水100‑700份。其制备方法通过在母液合成生产滴加前先向反应釜内加入不饱和酸及不饱和酯进行预聚合，提前生成一部分分子量较大的聚羧酸减水剂分子，随后将剩余的不饱和酸、不饱和酯及不饱和磺酸盐再通过滴加入反应釜进行合成，可使合成的母液中主要含有两种带有酯类官能团不同分子链长度的聚羧酸梳形链，在混凝土中产生阶梯式的水解速度，持续均匀提供阴离子吸附基团，从而提高保坍性能。
Polycarboxylate superplasticizer mother liquor and preparation method thereof
一种聚羧酸减水剂母液及其制备方法
LI YANJIANG (author) / YANG TIAN (author) / WANG YIJUN (author) / GUO KAI (author)
2023-09-05
Patent
Electronic Resource
Chinese
Polycarboxylate superplasticizer mother liquor and preparation method thereof
| European Patent Office | 2023
| European Patent Office | 2020
Polycarboxylate superplasticizer mother liquor and preparation method thereof
| European Patent Office | 2015
| European Patent Office | 2020
| European Patent Office | 2022