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Multi-cation mud-resisting type polycarboxylic acid water reducer and preparation method thereof

A multi-cation, anti-mud type technology, applied in the field of concrete admixture, can solve the problems of poor use effect and large adsorption of polycarboxylate superplasticizer, and achieve the effect of difficult desorption, inhibition of adsorption, and high positive charge density

Active Publication Date: 2018-05-18
武汉优城科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large adsorption of polycarboxylate by clay due to its layered structure, the effect of polycarboxylate superplasticizers in raw materials with high mud content is poor

Method used

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  • Multi-cation mud-resisting type polycarboxylic acid water reducer and preparation method thereof
  • Multi-cation mud-resisting type polycarboxylic acid water reducer and preparation method thereof
  • Multi-cation mud-resisting type polycarboxylic acid water reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This example provides a polycationic anti-mud type polycarboxylate superplasticizer and its preparation method:

[0037] The first step: preparation of unsaturated anti-mud type monomer C solution

[0038] Put 174 parts of hydroxyethyl acrylate into the reactor, and add dropwise a hydrochloric acid solution containing 142 parts of tetraethylenepentamine at 30°C for 1 hour to obtain the unsaturated mud-resistant monomer C solution.

[0039] The general formula of the unsaturated anti-mud type monomer C is:

[0040]

[0041] where R 1 for H, R 2 for CH 2 CH 2 .

[0042] The second step: preparation of polycation anti-mud type polycarboxylate superplasticizer

[0043] Put 2400 parts of polyether macromonomer TPEG (prenyl alcohol polyoxyethylene ether, molecular weight 2400) in the reactor, add water to dissolve; 144 parts of acrylic acid and the prepared unsaturated anti-mud type monomer C solution, mix and dissolve , recorded as X component; 16 parts of hydrogen...

Embodiment 2

[0045] This example provides a polycationic anti-mud type polycarboxylate superplasticizer and its preparation method:

[0046] The first step: preparation of unsaturated anti-mud type monomer C solution

[0047] Put 65 parts of hydroxypropyl acrylate into the reactor, and add dropwise a hydrochloric acid solution containing 94 parts of tetraethylenepentamine at 60°C for 2 hours to obtain the unsaturated mud-resistant monomer C solution.

[0048] The general formula of the unsaturated anti-mud type monomer C is:

[0049]

[0050] where R 1 for H, R 2 for (CH 3 )CHCH 2 .

[0051] The second step: preparation of polycation anti-mud type polycarboxylate superplasticizer

[0052] Put 2400 parts of polyether macromonomer HPEG (methallyl polyoxyethylene ether, molecular weight 2400) in the reactor, add water to dissolve; 288 parts of acrylic acid and the prepared unsaturated anti-mud type monomer C solution, mix Dissolved, recorded as X component; 18 parts of hydrogen pero...

Embodiment 3

[0054] This example provides a polycationic anti-mud type polycarboxylate superplasticizer and its preparation method:

[0055] The first step: preparation of unsaturated anti-mud type monomer C solution

[0056] Put 97.5 parts of hydroxyethyl methacrylate into the reactor, and add dropwise a hydrochloric acid solution containing 106.5 parts of tetraethylenepentamine at 45°C for 1.5 hours to obtain the unsaturated mud-resistant monomer C solution.

[0057] The general formula of the unsaturated anti-mud type monomer C is:

[0058]

[0059] where R 1 for CH 3 , R 2 for CH 2 CH 2 .

[0060] The second step: preparation of polycation anti-mud type polycarboxylate superplasticizer

[0061] Put 2400 parts of polyether macromonomer VPEG (4-hydroxybutyl vinyl polyoxyethylene ether, molecular weight 2400) in the reactor, add water to dissolve; 216 parts of acrylic acid and the prepared unsaturated anti-mud type monomer C solution , mix and dissolve, and record it as compon...

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Abstract

The invention discloses a multi-cation mud-resisting type polycarboxylic acid water reducer and a preparation method thereof. The multi-cation mud-resisting type polycarboxylic acid water reducer is prepared by polymerizing a polyether macro-monomer A, unsaturated carboxylic acid / unsaturated carboxylic acid anhydride B, and an unsaturated mud-resisting type monomer C in a water solution, wherein the unsaturated mud-resisting type monomer C is prepared by taking unsaturated hydroxyl ester and a hydrochloric acid solution of tetraethylenepentamine to react. The mud-resisting type polycarboxylicacid water reducer disclosed by the invention can be hydrolyzed under an alkaline condition to release a multi-cation type long-chain organic matter, physical and chemical properties of clay mineralscan be changed, expansion of the expansion type clay minerals is inhibited, and the consumption of polycarboxylic acid and water by mineral surfaces and crystal layers is reduced, so that the utilization performance of the polycarboxylic acid water reducer in a high-mud-content material is ensured, and the mud-resisting effect is realized; the problem that the clay minerals in a high-mud-content sand gravel material influences the utilization performance of the polycarboxylic acid water reducer is solved.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular to a polycationic anti-mud type polycarboxylate water reducer and a preparation method thereof. Background technique [0002] The addition of chemical admixtures can greatly improve the durability, workability, applicability, economy and strength of concrete, and provide a strong guarantee for the quality of large-scale projects. Therefore, its wide application is known as the successor to reinforced concrete and prestressed concrete. The 3rd major breakthrough in concrete technology after concrete. [0003] Polycarboxylate superplasticizer has become the most important product in the current concrete admixture market due to its advantages such as low dosage, high water reducing rate, good slump retention, strong molecular structure adjustability, and environmental protection. Polycarboxylate superplasticizer is a comb-shaped water-soluble polymer, which is composed of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F222/22C08F4/40C04B24/26C04B103/30
CPCC04B24/267C04B2103/302C08F4/40C08F283/065C08F220/06C08F222/22
Inventor 代柱端陈健董耀武周晓阳
Owner 武汉优城科技有限公司
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