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Polycarboxylene high-performance water reducing agent and preparation method thereof

A technology of polycarboxylate and water reducer, applied in the preparation of the polycarboxylate high performance water reducer, in the field of polycarboxylate high performance water reducer, can solve the problem of singleness of polycarboxylate products, adaptability Sexual stenosis and other problems, to achieve the effect of convenient application, lower cost, and improved properties

Inactive Publication Date: 2013-10-30
湖北恒利建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In order to solve the above problems, the present invention provides a polycarboxylate high-performance water reducer and its preparation method. The polycarboxylate high-performance water reducer can not only show good adaptability to different concrete construction materials , and reduce the use of retarders, improve the water reducing rate, and the product quality is more stable, which solves the shortcomings of the singleness and narrow adaptability of the existing polycarboxylic acid products

Method used

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  • Polycarboxylene high-performance water reducing agent and preparation method thereof
  • Polycarboxylene high-performance water reducing agent and preparation method thereof
  • Polycarboxylene high-performance water reducing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Add 2200g of MPEG (molecular weight: 1200) into a 3000ml flask and heat up to 70°C. After it is completely dissolved, add 0.40g of polymerization inhibitor phenothiazine and 2g of hydroquinone, stir for 2 to 3 minutes, and then add 438g of methacrylic acid. After stirring for 2-3 minutes, add 41g of concentrated sulfuric acid, raise the temperature to 120±5°C and keep it warm for 6 hours, and after keeping it warm for 1.5 hours, start filling with nitrogen for 3 hours to dehydrate to improve the esterification rate, and cool down to below 70°C to generate MPEGMAA.

[0063] Add 1600g of APEG and 1000g of deionized water into a 5000ml flask, raise the temperature to 60°C, add 110g of hydrogen peroxide diluted to 2% after the APEG is completely dissolved, mix material A (water 580g+AA200g+SA9.8g) and material B (MPEGMAA180g+water 120g) for 3 hours After uniform dropwise addition, keep warm at 60°C-65°C for 2 hours, cool down to 45°C, add 30% NaOH to adjust the pH value to a...

Embodiment 2

[0065] MPEGMAA was prepared in the same manner as in Example 1.

[0066] Add 1500g of APEG, 15g of MA and 950g of deionized water into a 5000ml flask, raise the temperature to 60°C, add 110g of hydrogen peroxide diluted to 2% after the APEG is completely dissolved, mix A material (water 580g+AA190g+SA9. ) after 3 hours of uniform dropwise addition, keep warm at 60°C-65°C for 2h, cool down to 45°C, add 30% NaOH to adjust the pH value to about 6.5, and finally add water to adjust the product to 40% and store it for later use.

Embodiment 3

[0068] MPEGMAA was prepared in the same manner as in Example 1.

[0069] Add 1400g of APEG, 25g of MA and 950g of deionized water into a 5000ml flask, raise the temperature to 60°C, add 110g of hydrogen peroxide diluted to 2% after the APEG is completely dissolved, mix material A (water 580g+AA180g+SA8. ) after 3 hours of uniform dropwise addition, keep warm at 60°C-65°C for 2h, cool down to 45°C, add 30% NaOH to adjust the pH value to about 6.5, and finally add water to adjust the product to 40% and store it for later use.

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Abstract

The invention provides a polycarboxylene high-performance water reducing agent, which is obtained by copolymerization of following monomer components: ester macro monomer, ether macro monomer, micro-molecule monomer and bulking agent. The invention also discloses a preparation method of the polycarboxylene high-performance water reducing agent. The polycarboxylene high-performance water reducing agent of the invention not only can show good adaptability for different concrete construction materials, but also reduces usage of a retarder, improves water-reducing rate, and has good bleeding rate and compressive strength rate. The product has more stable quality; the shortcomings that the polycarboxylene product in the prior art has single type and narrow adaptability is overcome.

Description

technical field [0001] The invention relates to a cement dispersant, in particular to a polycarboxylate high-performance water reducer, and a preparation method of the polycarboxylate high-performance water reducer. Background technique [0002] Concrete admixture has been used more and more widely in concrete construction. Its development and application have promoted the development of concrete technology, and it has become an indispensable key material in the process of concrete construction. [0003] The application of concrete admixtures involves the problems of the admixture itself and cement and sand and gravel. Among them, the adaptability of the admixture to cement and sand and gravel has become an important problem in the current concrete construction process, which is mainly manifested in bleeding and segregation. and slump loss too quickly. [0004] Polycarboxylate high-performance water reducer is a high-molecular compound with sulfonic acid group, carboxyl gro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F290/06C08F283/06C08F220/06C08F222/02C08F222/06C04B24/26C04B103/30
Inventor 王国亮魏运权周晓波胡从文魏运超
Owner 湖北恒利建材科技有限公司
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