Polycarboxylic cationic anti-mud agent, and preparation method and application thereof

A polycarboxylic acid-based, cationic technology, applied in the field of concrete admixtures, can solve problems such as limited adaptability, achieve the effects of reducing slump loss, improving initial fluidity, and enhancing dispersion effect

Inactive Publication Date: 2016-08-10
萧县沃德化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two anti-mud agents are only for specific soils and are not widely applicable

Method used

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  • Polycarboxylic cationic anti-mud agent, and preparation method and application thereof
  • Polycarboxylic cationic anti-mud agent, and preparation method and application thereof
  • Polycarboxylic cationic anti-mud agent, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A polycarboxylic acid cationic anti-mud agent, made of the following raw materials by weight: 49 parts of maleic anhydride, 45 parts of N,N dimethylethanolamine, 47 parts of sodium chloroacetate, 36 parts of acrylic acid, and methyl 65 parts of hydroxypropyl acrylate, 11.2 parts of sodium methacrylate sulfonate, 2.1 parts of ammonium persulfate, 2.2 parts of 30% hydrogen peroxide, 150 parts of acetone, 2.2 parts of VC, 50 parts of 32% sodium hydroxide aqueous solution, deionized water Right amount.

[0021] The preparation method of polycarboxylic acid cationic anti-mud agent includes the following steps:

[0022] 1) Dissolve maleic anhydride in acetone, add N,N dimethylethanolamine dropwise at a constant rate, control the dropping time for 20 minutes, keep it at a constant temperature of 10°C for 5 hours, then heat to 65°C to remove the acetone and cool down ;

[0023] 2) Add 200 parts of deionized water to step 1), adjust the pH of the system to 9 with sodium hydroxide sol...

Embodiment 2

[0029] A polycarboxylic acid cationic anti-mud agent, which is made of the following parts by weight of raw materials: 49 parts of maleic anhydride, 90 parts of N,N dimethylethanolamine, 50 parts of sodium chloroacetate, 40 parts of acrylic acid, and methyl 60 parts of hydroxypropyl acrylate, 14 parts of sodium methacrylate sulfonate, 3.1 parts of ammonium persulfate, 1.2 parts of 30% hydrogen peroxide, 150 parts of acetone, 2 parts of VC, 55 parts of 32% sodium hydroxide aqueous solution, deionized water Right amount.

[0030] The preparation method of polycarboxylic acid cationic anti-mud agent includes the following steps:

[0031] 1) Dissolve maleic anhydride in acetone, add N,N dimethylethanolamine dropwise at a constant rate, control the dropping time for 20 minutes, keep it at a constant temperature of 10°C for 5 hours, then heat to 65°C to remove the acetone and cool down ;

[0032] 2) Add 200 parts of deionized water to step 1), adjust the pH of the system to 9 with sodium...

Embodiment 3

[0038] A polycarboxylic acid cationic anti-mud agent, made from the following parts by weight of raw materials: 60 parts of maleic anhydride, 50 parts of N,N dimethylethanolamine, 50 parts of sodium chloroacetate, 40 parts of acrylic acid, and methyl 70 parts of hydroxypropyl acrylate, 10 parts of sodium methacrylate sulfonate, 3.5 parts of potassium persulfate, 2 parts of 30% hydrogen peroxide, 200 parts of acetone, 2 parts of VC, 56 parts of 32% sodium hydroxide aqueous solution, deionized water Right amount.

[0039] The preparation method of polycarboxylic acid cationic anti-mud agent includes the following steps:

[0040] 1) Dissolve maleic anhydride in acetone, add N,N dimethylethanolamine dropwise at a constant rate, control the dropping time for 15 minutes, keep it at a constant temperature of 15°C for 5 hours, then heat to 65°C to remove the acetone and cool down ;

[0041] 2) Add an appropriate amount of deionized water to step 1), adjust the pH of the system to 9 with so...

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Abstract

The invention discloses a polycarboxylic cationic anti-mud agent, and a preparation method and application thereof, belonging to the technical field of concrete additives. According to the invention, hydroxypropyl methacrylate with poor hydrophilicity is employed to replace side-chain monomer with good hydrophilicity for synthesis of monomer with a part of cationic charges; and acrylic acid and sodium methallyl sulfonate are used as anionic adsorption monomers for synthesis of a micromolecular polymer through free radical polymerization. Experimental results show that under the condition of same mud content of aggregates, a polycarboxylate superplasticizer with the anti-mud agent has obviously improved dispersion effect, improves the initial fluidity of concrete, reduces slump loss, enables the compressive strength of concrete to be increased by 1.5 to 3 MPa, exerts good inhibitory effect on mud content and is suitable for industrial large-scale production.

Description

Technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a polycarboxylic acid cationic anti-mud agent and a preparation method and application thereof. Background technique [0002] The third-generation water-reducing agent in the building materials industry is a high-performance water-reducing agent represented by polycarboxylic acid. It is favored by the building materials industry for its excellent performance of high water reduction and high collapse retention and good environmental protection characteristics. While polycarboxylic acid water-reducing agent has been widely used in concrete engineering, it also exposed some obvious defects, especially the soil contained in sand and gravel greatly affected the performance of polycarboxylic acid-based water-reducing agent, causing concrete to flow The degree is poor, and the slump loss is large. In recent years, with the depletion of natural sand, machine-made sand or natural ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/28C08F222/06C08F220/06C08F228/02C04B24/16
CPCC04B24/163C04B2103/0068C08F220/28C08F220/281C08F222/06C08F220/06C08F228/02
Inventor 彭城董翠平马丽涛
Owner 萧县沃德化工科技有限公司
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