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Water dispersible polymers and their applications

A dispersion and polymer technology, applied in the field of polymers, can solve problems such as bleeding, serious segregation, rapid loss over time, and serious concrete retardation

Active Publication Date: 2020-02-21
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 dispersible polymers and their applications
  • Water dispersible polymers and their applications
  • Water dispersible polymers and their applications

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0062] 30kg tetrahydrofuran, 50kg isopentenyl polyoxyethylene ether (molecular weight 5000), 1.03kg (3-acrylamidopropyl) trimethylammonium chloride, 10.36kg 2-perfluorooctyl ethyl acrylate are mixed Add the solution into the reaction kettle, heat and stir until the temperature rises to 50°C; add 0.11kg of azobisisobutyronitrile dropwise to the bottom material, and the dropwise addition is completed within 3 hours. Afterwards, 20 kg of 2% sodium hydroxide solution was added dropwise and kept for 1 hour, and then kept for 1 hour, and water was added to adjust the solid content to obtain a 20% polymer solution.

Synthetic example 2

[0064] With 60kgN-methylpyrrolidone, 6kg methoxy polyethylene glycol methacrylate (molecular weight is 2400), 1.25kg methallyl polyoxyethylene ether (molecular weight is 500), 1.1kg methacryloyl propyl Trimethylammonium chloride, 18.31kg (perfluorocyclohexyl) methacrylate, and 77.73kg 2-perfluorooctyl ethyl acrylate were made into a mixed solution and added to the reactor, heated and stirred until the temperature rose to 60°C; 0.62kg of azobisisobutyronitrile was added dropwise to the base material, and the dropwise addition was completed within 3 hours. Then add 30kg 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 prepare a 20% polymer solution.

Synthetic example 3

[0066] 30kg tetrahydrofuran, 0.30kg azobisisobutyronitrile, 45kg isopentenyl polyoxyethylene ether (molecular weight is about 1500), 12kg acryl polyoxyethylene ether (molecular weight is about 1200), 2.21kg methacrylic acid Trimethylammonium chloride, 2.09kg 1H, 1H, 2H, 2H-perfluorooctyl acrylate, 2.56kg methacrylate, 1.57kg styrene, 1 was made into a mixed solution and added to the reactor, heated and stirred until The temperature was raised to 50°C and kept for 4h. Afterwards, 30 kg of 2% sodium hydroxide solution was added dropwise for 1 h, kept warm for 1 h, and water was added to adjust the solid content to obtain a 20% polymer solution.

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PUM

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Abstract

The invention provides a water-dispersible polymer, which consists of a hydrophobic monomer A, a macromonomer B1 and an alkenyl-containing quaternary ammonium salt monomer C; or consists of a hydrophobic monomer A and a macromonomer B, acrylic acid At least one monomer of quasi-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 present invention also provides the application of the water-dispersible polymer in concrete or cement. When the water-dispersible 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, resist segregation and bleeding, and ensure considerable transmission stability.

Description

technical field [0001] The invention belongs to the field of macromolecules, and in particular relates to a water-dispersible 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, dura...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/60C08F220/24C08F290/06C08F216/14C08F212/14C08F220/38C08F220/34C08F212/08C08F220/10C08F220/18C08F230/02C08F222/02C08F220/06C08F220/58C08F220/54C08F212/12C04B28/00C04B24/32
CPCC04B24/32C04B28/00C08F283/065C08F290/062C04B2103/302C08F220/1803C08F216/1475C08F220/1812C08F220/1818C08F212/14C08F220/60C08F220/387C08F220/1804C08F220/1808C08F220/34C08F220/585
Inventor 孔祥明张力冉
Owner TSINGHUA UNIV
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