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Water Soluble Polymer and Its Application

A technology for the polymerization of water-soluble polymers and monomers, applied in the polymer field, can solve the problems of excessive time loss, serious bleeding, serious segregation, and serious retardation of concrete, and achieve the effect of good fluidity

Active Publication Date: 2020-02-18
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] ① Bleeding and segregation are serious;
[0010] ②Concrete retardation phenomenon is serious;
[0011] ③Excessive time loss

Method used

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  • Water Soluble Polymer and Its Application
  • Water Soluble Polymer and Its Application
  • Water Soluble Polymer and Its Application

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0061] 30kg tetrahydrofuran, 60kg methallyl polyoxyethylene ether (molecular weight is about 2400), 5.52kg methacryloylpropyltrimethylammonium chloride, 1.08kg 2-(perfluorohexyl) ethyl methacrylic acid Esters and 0.16kg of azobisisobutyronitrile were formulated as a mixed solution and added to the reaction kettle, heated and stirred until the temperature rose to 50°C, and kept for 4 hours. Then add 50 kg of 2% sodium hydroxide solution dropwise for 1 hour, keep warm for 1 hour and cool down to less than 45° C., add water to adjust the solid content to obtain a 20 percent polymer solution.

Synthetic example 2

[0063] 12kg of methoxy polyethylene glycol acrylate (molecular weight is about 1200), isopentenyl polyoxyethylene ether (molecular weight is about 4000), and 70kg of deionized water are made into a primer and added to the reaction kettle, heated and stirred to the temperature Rise to 80°C; add 0.35kg sodium persulfate, 2.6kg (3-acrylamidopropyl) trimethyl ammonium chloride, 1.6kg 2-(perfluorobutyl) ethyl acrylate and 7.8kg 2-perfluorooctyl Ethyl acrylate is formulated into a mixed solution, which is added dropwise to the base material, and the dropwise addition is completed in 3 hours and kept for 2 hours. Afterwards, 30 kg of 2% sodium hydroxide solution was added dropwise and kept for 1 hour, the temperature was lowered to less than 45° C., and water was added to adjust the solid content to obtain a 20% polymer solution.

Synthetic example 3

[0065] With 6.25kg allyl polyoxyethylene ether (molecular weight is 500), 60kg methallyl polyoxyethylene ether (molecular weight is 2400), 70kgN-methyl pyrrolidone, 8.28kg methacryloyl propyl trimethyl chloride Ammonium chloride, 5.17kg (3-acrylamidopropyl) trimethylammonium chloride, 2.62kg 1H, 1H, 2H, 2H-perfluorooctyl alcohol acrylate, 2.5kg ethyl acrylate, 0.65kg styrene to form a mixture Add the solution into the reaction kettle, heat and stir until the temperature rises to 60° C.; add 0.40 kg of azobisisobutyronitrile dropwise to the bottom material, and the dropwise addition is completed within 3 hours. Then add 60 kg of 2% sodium hydroxide solution dropwise for 1 hour, keep warm for 1 hour, cool down to less than 45°C, add water to adjust the solid content to obtain a 20% polymer solution.

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Abstract

The invention provides a water-soluble polymer, which consists of hydrophobic monomer A, macromonomer B1 and alkenyl-containing quaternary ammonium salt monomer C; or consists of hydrophobic monomer A and selected from macromonomer B, acrylic acid At least one monomer of monomer D, sulfonic acid monomer E and phosphonic acid monomer F; or obtained by polymerizing hydrophobic monomer A, macromonomer B1 and electrically neutral monomer G. The invention also provides the application of the water-soluble polymer in concrete or cement. When the water-soluble polymer of the present invention is used as a pumping agent, it not only has the property of reducing viscosity, but also enables the concrete to have better fluidity, resists segregation and bleeding, and ensures considerable transmission stability.

Description

technical field [0001] The invention belongs to the field of macromolecules, and in particular relates to a water-soluble polymer and its application. Background technique [0002] With the rapid development of the economy and the continuous improvement of construction technology, as well as to solve the contradiction between the growth of urban population and the serious shortage of urban construction land and the rapid expansion of the scale of traffic construction, the development of high-rise concrete structures has become inevitable, which will affect the concrete. Construction performance, mechanical properties and durability requirements are getting higher and higher. Pumping concrete technology has become one of the main development trends in concrete technology. [0003] With the technological improvement of modern construction equipment, the performance requirements of pumped concrete are also continuously increasing. In order to meet higher workability, durabili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/24C08F291/06C08F220/18C08F212/08C08F220/02C08F220/58C08F220/60C08F212/14C08F228/02C08F230/02C08F220/56C04B24/16C04B24/24C04B24/26
CPCC04B24/165C04B24/246C04B24/2647C04B24/2658C04B24/2682C08F283/065C04B2103/0068C08F220/606C08F220/1818C08F212/14
Inventor 孔祥明张力冉
Owner TSINGHUA UNIV
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