A kind of phosphonic acid-based polymer and its preparation method and phosphoric acid-based mother liquor

A phosphonic acid-based and polymer technology, applied in the field of chemical building materials, can solve the problems that affect the performance of a water reducing agent and cannot take into account water reduction and setting retardation at the same time, and achieve the effects of low cost, easy industrial production, and high water reduction rate.

Active Publication Date: 2021-04-06
厦门路桥翔通建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a phosphonic acid-based polymerizing agent to overcome the defects that the existing polycarboxylate water reducer cannot take into account both water reduction and retardation at the same time, and the compound use of the retarder will affect the performance of the water reducer. Compound and its preparation method and phosphoric acid-based water reducer

Method used

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  • A kind of phosphonic acid-based polymer and its preparation method and phosphoric acid-based mother liquor
  • A kind of phosphonic acid-based polymer and its preparation method and phosphoric acid-based mother liquor
  • A kind of phosphonic acid-based polymer and its preparation method and phosphoric acid-based mother liquor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) The composition of raw materials is as follows:

[0034]

[0035] (2) dissolving acrylic acid and styrene phosphonic acid in 15 parts by weight of water to obtain a first solution, and dissolving a reducing agent and a chain transfer agent in 31.2 parts by weight of water to obtain a second solution;

[0036] (3) Add the unsaturated polyether and 277.5 parts by weight of water into the reactor. After stirring and dissolving at room temperature, add the oxidizing agent. After stirring for 5 minutes, add the first solution and the second solution dropwise at the same time. For 2 hours, after the dropwise addition, it was incubated for 2 hours to carry out free radical polymerization;

[0037] (4) After the free radical polymerization reaction is finished, adjust the pH value to 6.0 with a 30% mass concentration of sodium hydroxide solution to obtain a clear solution that is a phosphoric acid-based water reducer with a solid content of 40 wt%, and the phosphoric aci...

Embodiment 2

[0039] (1) The composition of raw materials is as follows:

[0040]

[0041] (2) dissolving acrylic acid and styrene phosphonic acid in 19.32 parts by weight of water to obtain a first solution, and dissolving a reducing agent and a chain transfer agent in 74.1 parts by weight of water to obtain a second solution;

[0042] (3) Add the unsaturated polyether and 277.5 parts by weight of water into the reactor, stir and dissolve at room temperature, add the oxidizing agent, and after stirring for 10 minutes, add the first solution and the second solution dropwise at the same time. For 3 hours, after the dropwise addition, it was incubated for 1 hour to carry out free radical polymerization;

[0043] (4) After the free radical polymerization reaction is finished, adjust the pH value to 7.0 with a 30% mass concentration of sodium hydroxide solution to obtain a clear solution that is a phosphoric acid-based water reducer with a solid content of 37wt%, and the phosphoric acid grou...

Embodiment 3

[0045] (1) The composition of raw materials is as follows:

[0046]

[0047] (2) dissolving acrylic acid and styrene phosphonic acid in 21 parts by weight of water to obtain a first solution, and dissolving a reducing agent and a chain transfer agent in 50.7 parts by weight of water to obtain a second solution;

[0048] (3) Add the unsaturated polyether and 277.5 parts by weight of water into the reactor. After stirring and dissolving at room temperature, add the oxidizing agent. After stirring for 8 minutes, add the first solution and the second solution dropwise at the same time. For 3 hours, after the dropwise addition, it was incubated for 1.5 hours to carry out free radical polymerization;

[0049] (4) After the free radical polymerization reaction is finished, adjust the pH value to 6.5 with 30% mass concentration of sodium hydroxide solution to obtain a clear solution that is a phosphoric acid-based water reducer with a solid content of 40wt%, and the phosphoric acid...

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Abstract

The invention relates to the field of chemical building materials, in particular to a phosphonic acid-based polymer, a preparation method thereof and a phosphoric acid-based water reducer. The phosphonic acid-based polymer includes a structural unit derived from an unsaturated polyether, a structural unit derived from an unsaturated acid, and a structural unit derived from an unsaturated phosphonic acid, and the unsaturated polyether is isobutylene polyoxyethylene ether , and relative to 185-205 parts by weight of structural units derived from unsaturated polyether, the content of structural units derived from unsaturated acids is 20-30 parts by weight, and the content of structural units derived from unsaturated phosphonic acids is 5 -10 parts by weight. The phosphonic acid-based water reducer provided by the invention not only has high water reducing rate and good retarding effect, but also has good adaptability to different types of cement, and will not cause side effects due to different types of cement, and its preparation process Simple, the reaction is carried out at normal temperature, the temperature of the whole process does not need to be controlled, the reaction time is short, the energy consumption is low, the cost is low, the safety factor is high, no pollution, and it is easy for industrial production.

Description

technical field [0001] The invention belongs to the field of chemical building materials, and in particular relates to a phosphonic acid-based polymer, a preparation method thereof and a phosphoric acid-based water reducer. Background technique [0002] As an important part of modern high-performance concrete, polycarboxylate superplasticizer has been widely used in recent ten years because of its advantages of low dosage, high water reduction, good adaptability, strong structural adjustability and environmental protection. Huge development and wide application. However, other properties of polycarboxylate superplasticizers are often relatively single, and cannot meet the construction requirements under specific conditions. For example, concrete construction often requires delaying the setting time, especially in hot summer, when the temperature is high and the setting time of concrete is shortened. The loss of fluidity will bring great inconvenience to the construction, or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/06C08F230/02C08F4/40C04B24/26C04B103/30
CPCC04B24/243C04B2103/302C08F4/40C08F283/065C08F220/06
Inventor 李芳杨秀芳康净鑫
Owner 厦门路桥翔通建材科技有限公司
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