A kind of polycarboxylate cationic anti-mud agent and its preparation method and application

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: 2018-04-24
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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  • A kind of polycarboxylate cationic anti-mud agent and its preparation method and application
  • A kind of polycarboxylate cationic anti-mud agent and its preparation method and application
  • A kind of polycarboxylate cationic anti-mud agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A polycarboxylic acid cationic anti-mud agent, made of the following raw materials in parts by weight: 49 parts of maleic anhydride, 45 parts of N,N dimethylethanolamine, 47 parts of sodium chloroacetate, 36 parts of acrylic acid, methyl 65 parts of hydroxypropyl acrylate, 11.2 parts of sodium methacrylate, 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% aqueous sodium hydroxide solution, deionized water Appropriate amount.

[0021] The preparation method of polycarboxylate cationic anti-mud agent comprises the following steps:

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

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

Embodiment 2

[0029] A polycarboxylic acid cationic anti-mud agent, made of the following raw materials in parts by weight: 49 parts of maleic anhydride, 90 parts of N,N dimethylethanolamine, 50 parts of sodium chloroacetate, 40 parts of acrylic acid, methyl 60 parts of hydroxypropyl acrylate, 14 parts of sodium methacrylate, 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% aqueous sodium hydroxide solution, deionized water Appropriate amount.

[0030] The preparation method of polycarboxylate cationic anti-mud agent comprises the following steps:

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

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

Embodiment 3

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

[0039] The preparation method of polycarboxylate cationic anti-mud agent comprises the following steps:

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

[0041] 2) Add an appropriate amount of deionized water to step 1), adjust the pH of the system to 9 with sodium hydroxide 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 polycarboxylate cationic anti-mud agent and its preparation method and application. Background technique [0002] The third-generation water reducer in the building material industry is a high-performance water reducer represented by polycarboxylic acid. It is favored by the building material industry for its excellent performance of high water reduction and high slump retention and good environmental protection characteristics. While polycarboxylate superplasticizers are widely used in concrete engineering, some obvious defects have been exposed, especially the soil contained in sand and gravel greatly affects the performance of polycarboxylate superplasticizers, resulting in concrete flow. The degree is poor, and the slump loss is large. In recent years, with the depletion of natural sand, machine-made sand or poor-quality natural sand has been replaced, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(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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