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Hyperbranched concrete tackifier as well as preparation method and application thereof

A tackifier and concrete technology, which is applied in the field of hyperbranched concrete tackifier and its preparation, can solve the problems of inter-molecular entanglement and segregation, and achieve the effects of good compatibility, simple synthesis method, and improved workability

Pending Publication Date: 2021-11-12
WUHAN YUANJIN BUILDING MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can avoid the problem of intermolecular entanglement in linear polyether, can effectively adjust the cohesion of concrete, and solve the problems of bleeding and segregation of fresh concrete

Method used

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  • Hyperbranched concrete tackifier as well as preparation method and application thereof
  • Hyperbranched concrete tackifier as well as preparation method and application thereof
  • Hyperbranched concrete tackifier as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The hyperbranched concrete tackifier of the present embodiment consists of hyperbranched polymer A, N-hydroxysuccinimide acrylate, polyethylene glycol maleic acid diester and 2-propionamido-2-methylpropanesulfonate The acid is prepared by free radical polymerization; the hyperbranched polymer A is prepared by ring-opening polymerization of propenyl glycidyl ether.

[0041] The preparation method of described concrete tackifier specifically comprises the following steps:

[0042] S1. Add 150ml of DMAC solution and 68.48g of propenyl glycidyl ether into a four-necked flask equipped with an electric stirrer, dropping device, thermometer and nitrogen circulation, set the temperature of the oil bath to 60°C and stir well; then add 1.14g After the trimethylolpropane is completely dissolved, add 2.85g of potassium carbonate; the temperature rises to 120°C, and then use a peristaltic pump to slowly add 45.66g of propenyl glycidyl ether into the four-necked flask; after the addi...

Embodiment 2

[0045] The hyperbranched concrete tackifier of the present embodiment consists of hyperbranched polymer A, N-hydroxysuccinimide methacrylic acid, diethylene glycol diester maleate and methacrylamidopropyl-N, N dimethylpropanesulfonic acid is prepared by radical polymerization; the hyperbranched polymer A is prepared by ring-opening polymerization of propenyl glycidyl ether.

[0046] The preparation method of described concrete tackifier specifically comprises the following steps:

[0047] S1. Add 150ml of DMAC solution and 57.07g of propenyl glycidyl ether into a four-necked flask equipped with an electric stirrer, dropping device, thermometer and nitrogen circulation, set the temperature of the oil bath to 60°C, and stir well; then add 1.71g After the trimethylolpropane is completely dissolved, add 2.85g of potassium carbonate; the temperature rises to 120°C, and then use a peristaltic pump to slowly add 57.07g of propenyl glycidyl ether into the four-necked flask; after the ...

Embodiment 3

[0050] The hyperbranched concrete tackifier of the present embodiment consists of hyperbranched polymer A, N-hydroxysuccinimide methacrylic acid, diethylene glycol diester maleate and methacrylamidopropyl-N, N dimethylpropanesulfonic acid is prepared by radical polymerization; the hyperbranched polymer A is prepared by ring-opening polymerization of propenyl glycidyl ether.

[0051] The preparation method of described concrete tackifier specifically comprises the following steps:

[0052] S1. Add 150ml of DMAC solution and 89.69g of methacryl glycidyl ether into a four-necked flask equipped with an electric stirrer, dropping device, thermometer and nitrogen circulation, set the temperature of the oil bath to 60°C, and stir well; then add 1.71g of trimethylolpropane, add 2.85g of potassium carbonate after it is completely dissolved; the temperature rises to 120°C, and then slowly add 38.44g of methacryl glycidyl ether into the four-necked flask by using a peristaltic pump; drop...

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Abstract

The invention discloses a hyperbranched concrete tackifier as well as a preparation method and application thereof, and belongs to the technical field of building material concrete admixtures. The hyperbranched concrete tackifier is prepared from a hyperbranched polymer A, an unsaturated succinimide monoester monomer, an unsaturated maleic acid diester monomer and an unsaturated sulfonic acid monomer through a free radical polymerization reaction. The hyperbranched polymer A is prepared from an unsaturated ternary oxygen-containing heterocyclic ring monomer through a ring-opening polymerization reaction, and the unsaturated ternary oxygen-containing heterocyclic ring monomer is allyl glycidyl ether or methyl allyl glycidyl ether. The tackifier provided by the invention can effectively improve the workability of fresh concrete, solves the problems of concrete segregation, bleeding and sedimentation, has obvious water retention and tackifying effects and good slurry wrapping effect, and does not have a serious delayed coagulation or air entraining phenomenon.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures for building materials, and in particular relates to a hyperbranched concrete tackifier and its preparation method and application. Background technique [0002] With the continuous development of building structure design and super high-rise buildings, building construction also puts forward higher requirements for concrete. The continuous complexity of concrete components and the continuous increase in the density of steel bars in building components often require concrete to have large fluidity, but If the mixture is too ethylene, the concrete is prone to stratification and segregation, which will easily cause problems such as pumping, construction site leakage, and solidified body strength not up to standard, which will affect the quality and service life of the concrete project. In addition, the mining of natural sand is limited, and the use of machine-made sand is increasing day ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F290/06C08F220/36C08F220/58C04B24/26C04B103/44
CPCC08F283/06C08F290/062C04B24/2694C04B2103/44C08F220/36C08F220/585
Inventor 李正平汪源汪苏平李祥
Owner WUHAN YUANJIN BUILDING MATERIALS TECH CO LTD
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