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Energy-saving environment-friendly polycarboxylic acid water reducing agent, and preparation method thereof

A technology of energy saving, environmental protection and water reducing agent, applied in the field of chemical building materials, can solve the problems of high production cost, complex production process, unenvironmental protection, etc., and achieve the effect of saving construction cost, good adaptability, and no three wastes discharge.

Inactive Publication Date: 2017-01-04
石家庄市海森化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above two most common production characteristics have resulted in high production costs, unenvironmental protection, and complicated production processes.

Method used

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  • Energy-saving environment-friendly polycarboxylic acid water reducing agent, and preparation method thereof
  • Energy-saving environment-friendly polycarboxylic acid water reducing agent, and preparation method thereof
  • Energy-saving environment-friendly polycarboxylic acid water reducing agent, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] ① Add 25.0g of methacrylic acid, 0.5g of sodium bisulfite, 0.2g of thioglycolic acid, add 20g of water, stir well, and use it as liquid A for later use.

[0026] ②Add 2.0g of hydrogen peroxide to 25g of water, stir evenly, and use it as liquid B for later use.

[0027] ③ Add well water: 200g into a 500ml four-necked flask equipped with a thermometer and stirring equipment, add 220g of HPEG (isobutylene alcohol polyoxyethylene ether) macromonomer, and stir for 10 minutes.

[0028] ④ Use a peristaltic pump to add liquid A and liquid B in parallel at a constant speed, and the time for adding liquid A and liquid B is controlled within 2 hours.

[0029] ⑤ After the dropwise addition is completed, continue to react for 30 minutes, and the finished product is made after the reaction is completed.

[0030] In this example, the conductivity of well water is 800us / cm, the initial temperature of feeding is 15°C, and the product number is marked as: S-001.

Embodiment 2

[0032] ① Add 25.0g of methacrylic acid, 0.5g of sodium bisulfite, 0.2g of thioglycolic acid, add 20g of water, stir well, and use it as liquid A for later use.

[0033] ②Add 2.0g of hydrogen peroxide to 25g of water, stir evenly, and use it as liquid B for later use.

[0034] ③In a 500ml four-necked flask equipped with a thermometer and stirring equipment, add shallow well water: 120g, add 220g of HPEG (isobutylene alcohol polyoxyethylene ether) macromonomer, and stir for 10 minutes.

[0035] ④ Use a peristaltic pump to add liquid A and liquid B in parallel at a constant speed, and the time for adding liquid A and liquid B is controlled within 2 hours.

[0036] ⑤ After the dropwise addition is completed, continue to react for 30 minutes, and the finished product is made after the reaction is completed.

[0037] In this example, the conductivity of well water is 2200us / cm, the initial temperature of feeding is 6°C, and the product number is marked as: S-002.

Embodiment 3

[0039] ①Acrylic acid 20.0g, L-ascorbic acid 0.8g, thioglycolic acid 0.2g, mercaptopropionic acid 0.5g add water 25g, stir evenly, use as A solution for later use.

[0040] ② Add 3.0g of hydrogen peroxide, add 24g of water, stir evenly, and use it as liquid B for later use.

[0041] ③Add well water: 200g into a 500ml four-necked flask equipped with a thermometer and stirring equipment, add 230g of HPEG (isobutylene alcohol polyoxyethylene ether) macromonomer, and stir for 10 minutes.

[0042] ④ Use a peristaltic pump to add liquid A and liquid B in parallel at a constant speed. The feeding time of liquid A is 3 hours, and the feeding time of liquid B is 2 hours.

[0043] ⑤ After the dropwise addition is completed, continue to react for 30 minutes, and the finished product is made after the reaction is completed.

[0044] In this example, the conductivity of well water is 800us / cm, the initial temperature of feeding is 8°C, and the product number is marked as: S-003.

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Abstract

The invention discloses an energy-saving environment-friendly polycarboxylic acid water reducing agent, and a preparation method thereof, and belongs to the field of chemical industry building materials. The energy-saving environment-friendly polycarboxylic acid water reducing agent is composed of, by weight, 30 to 50% of a polyoxyethylene ether macromonomer, 2 to 5% of a comonomer, 0.05 to 0.5% of a chain transfer agent, 0.1 to 0.8% of an initiating agent, and the balance water. According to the preparation method, free radical polymerization is adopted, water is taken as a solvent, no heating equipment is needed, heating is not needed in production process, dissolving of the polyoxyethylene ether macromonomer is not needed, the preparation method is simple, no heating cost is consumed, no three wastes are discharged, the energy-saving environment-friendly polycarboxylic acid water reducing agent is green and is friendly to the environment, water used in the preparation method is tape water or well water, no deionizing equipment is used, plant construction cost is reduced, and the energy-saving environment-friendly polycarboxylic acid water reducing agent is low in doping amount, and high in water-reducing rate, slump retaining performance, and adaptability with cement.

Description

technical field [0001] The invention relates to the field of chemical building materials, in particular to an energy-saving and environment-friendly polycarboxylate water reducer and a preparation method thereof. Background technique [0002] Concrete water reducing agent is an admixture that reduces the amount of cement mixing water to improve the strength of concrete without affecting the workability of concrete and the amount of cement. In recent years, due to the emergence of polycarboxylate superplasticizers, the scope of use of concrete has been expanded. According to the improvement of water reduction or slump retention during mixing, the performance of concrete has been improved. Polycarboxylate superplasticizers are comb-shaped structures. Polymers, composed of anions (polycarboxylates) and side chains (polyoxyethylene ethers), whose dispersibility is mainly due to their adsorption of cement particles, this is due to the cations of the polymers combined with the for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F220/28C08F4/40C08F2/38C04B24/26C04B103/30
Inventor 庞顺星梁英潘二军赵海娟马墨岩朱佳宇
Owner 石家庄市海森化工有限公司
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