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Sodium sulfanilate modified polycarboxylate superplasticizer and preparing method of sodium sulfanilate modified polycarboxylate superplasticizer

A technology of sodium sulfanilate and polycarboxylic acid is applied in the field of material synthesis to achieve the effects of improving dispersibility, good mechanical properties and short reaction period

Active Publication Date: 2015-04-01
ZHEJIANG FANGYUAN BUILDING MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although polycarboxylate water reducers and sulfamate water reducers each have good performance, there is no report on how to introduce sulfamate into polycarboxylate water reducers to achieve A sulfamate-modified polycarboxylate water reducer with wide adaptability, strong compatibility, simple process and excellent performance

Method used

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  • Sodium sulfanilate modified polycarboxylate superplasticizer and preparing method of sodium sulfanilate modified polycarboxylate superplasticizer
  • Sodium sulfanilate modified polycarboxylate superplasticizer and preparing method of sodium sulfanilate modified polycarboxylate superplasticizer
  • Sodium sulfanilate modified polycarboxylate superplasticizer and preparing method of sodium sulfanilate modified polycarboxylate superplasticizer

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Embodiment 1

[0023] Taking the total weight of each raw material as a basis, take the raw materials according to the mass percentage of each raw material, stir the 9.74wt% sodium p-sulfanilate, 5.52wt% maleic anhydride and 9.74wt% toluene evenly, then stir and heat up to React at 60±1°C for 3 hours. After the reaction is over, distill off the solvent toluene, cool to room temperature, add water, and stir evenly to obtain the corresponding intermediate product. The aqueous solution of the compound of formula I is preferably formulated to a mass percentage of 40 wt. The aqueous solution of the intermediate product formula I compound of %;

[0024] Then, add 68wt% prenol-terminated polyoxyethylene ether, 4.0wt% acrylic acid and add 2.0wt% sodium methacrylic acid sulfonate, stir and dissolve, and prepare a 40% homogeneous solution; then add 0.4 Mix wt% oxidant ammonium persulfate and potassium permanganate, stir for 5min, add 0.6wt% reducing agent sodium formaldehyde sulfoxylate and L-ascorbic...

Embodiment 2

[0028] Take the total weight of each raw material as a basis, take the raw materials according to the mass percentage of each raw material, stir the 3.90wt% sodium p-sulfanilate, 2.20wt% maleic anhydride and 3.90wt% toluene, then stir and heat up to React at 55±1°C for 4 hours. After the reaction is over, distill off the solvent toluene, cool to room temperature, add water, and stir evenly to obtain the corresponding intermediate product. The aqueous solution of the compound of formula Ⅰ is preferably formulated to a mass percentage of 40 wt. The aqueous solution of the intermediate product formula I compound of %;

[0029] Then, add 83wt% prenol-terminated polyoxyethylene ether, 4.0wt% acrylic acid and 2.0wt% sodium methacrylic acid sulfonate, stir and dissolve, and prepare a 40% homogeneous solution; then add 0.6 Mix wt% oxidant ammonium persulfate and potassium permanganate, and the molar ratio of ammonium persulfate and potassium permanganate is 4:1, stir for 5min, then ad...

Embodiment 3

[0033]Take the total weight of each raw material as a basis, take the raw materials according to the mass percentage of each raw material, stir the maleic anhydride and 8.18wt% toluene of 8.18wt% sodium p-aminobenzenesulfonate, 4.64wt% toluene, then stir and heat up to React at 65±1°C for 3.0 hours. After the reaction is over, distill off the solvent toluene, cool to room temperature, add water, and stir evenly to obtain the corresponding intermediate product. The aqueous solution of the compound of formula I, preferably formulated to a mass percentage of 40wt The aqueous solution of the intermediate product formula I compound of %;

[0034] Then, add 73wt% prenol-terminated polyoxyethylene ether, 3.0wt% acrylic acid and 2.0wt% sodium methacrylic acid sulfonate, stir and dissolve, and prepare a 40% homogeneous solution; then add 0.5 Mix wt% oxidant ammonium persulfate and potassium permanganate, and the molar ratio of ammonium persulfate and potassium permanganate is 6:1, stir...

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Abstract

The invention relates to a sodium sulfanilate modified polycarboxylate superplasticizer and a preparing method of the sodium sulfanilate modified polycarboxylate superplasticizer, and belongs to the technical field of material synthesis. The effects of reducing the slump losses and improving the mechanical property are achieved. The preparing method includes the following steps: methylbenzene serves as solvents, sodium sulfanilate and maleic anhydride are reacted under the temperature condition ranging from 55 DEG C to 65 DEG C to generate corresponding intermediate products, then the solvents are removed, and water is added to prepare a corresponding intermediate product aqueous solution; polyether macromonomer, crylic acid and sodium methallyl sulfonate are added into the intermediate product aqueous solution to be stirred to be evenly mixed, then oxidizing agents and reducing agents are added, and stirring is carried out to enable the mixture to be reacted to generate the inter polymer sodium sulfanilate modified polycarboxylate superplasticizer. The sodium sulfanilate modified polycarboxylate superplasticizer and the preparing method have the advantages that the dispersing capacity and the concrete peaceability of the polymer can be improved, and the concrete slump losses can be remarkably reduced.

Description

technical field [0001] The invention relates to a polycarboxylate water reducer modified by sodium p-aminobenzenesulfonate and a preparation method thereof, belonging to the technical field of material synthesis. Background technique [0002] In recent years, polycarboxylate water reducers have been widely used in the concrete industry. The main reason is that this type of water reducer can endow concrete with high dispersion, fluidity and high dispersion system stability at low dosages to prevent slumping At the same time, problems such as long production cycle of naphthalene-based water reducers, serious environmental pollution, and serious slump loss have become increasingly prominent, making the research of polycarboxylate water reducers become the research field of concrete admixtures. Hotspots enable it to be widely used in key major projects and civil building concrete structures. [0003] At present, the common method of preparing polycarboxylate water reducer in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F222/38C08F220/06C08F228/02C08F4/40C04B24/16C04B103/30
Inventor 杨晓华叶慈彪杨飞谭洪波杨海明张龙
Owner ZHEJIANG FANGYUAN BUILDING MATERIALS TECH
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