Anti-clay polymer dispersing agent and preparation method thereof

A polymer and anti-clay technology, which is applied in the field of concrete admixtures, can solve the problems of poor anti-clay performance and limited industrialization, and achieve the effect of improving mud resistance, simple synthesis process, and enhanced adsorption capacity

Active Publication Date: 2017-08-15
JIANGSU SOBUTE NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In order to solve the problem that the existing cement concrete dispersant has poor anti-clay performance, or has anti-clay performance, but the industrialization is limited due to various reasons, the invention provides a kind of anti-clay polymer dispersant and its preparation method and application, the clay-resistant polymer dispersant can be used as a dispersant for aqueous dispersions of hydraulic binders and / or latent hydraulic binders

Method used

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  • Anti-clay polymer dispersing agent and preparation method thereof
  • Anti-clay polymer dispersing agent and preparation method thereof
  • Anti-clay polymer dispersing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] In this embodiment, B / (A+D)=1:1, A / D=2.0.

[0067] (1) Polycondensation reaction

[0068] Add 27.6g (0.2mol) of p-hydroxybenzoic acid A and 12.5g (0.125mol) of sulfuric acid C into a 1000ml four-neck flask equipped with electric mechanical stirring and a constant temperature heating oil bath, and stir until it is a homogeneous phase. Subsequently, 24.3 g (0.3 mol) of 37% formaldehyde aqueous solution B was slowly added dropwise. After completion of the dropwise addition, the reaction was carried out at 100° C. for 8 hours. After the reaction, it was cooled for later use.

[0069] (2) Esterification reaction

[0070] In a 2L round bottom flask, add (1) the polycondensate after the reaction, add 200g of polyether D (polyethylene glycol monomethyl ether 2000, 0.1mol), and 236g of cyclohexane with water agent, install a condenser, and raise the temperature To 100°C, react for 16 hours, cool down to about 60°C, add 200g of water, enter the separation device, separate the...

Embodiment 2

[0074] In this embodiment, B / (A+D)=1:1, A / D=2.0, E / D=1.0.

[0075] (1) Polycondensation reaction

[0076] In a 1000ml four-neck flask equipped with electric mechanical stirring and constant temperature heating oil bath, add 27.6g (0.2mol) of p-hydroxybenzoic acid A, 17.4g (0.1mol) of p-hydroxybenzenesulfonic acid, 10g (0.1mol) of sulfuric acid C ), and stir until it is a homogeneous phase. Subsequently, 24.3 g (0.3 mol) of 37% formaldehyde aqueous solution B was slowly added dropwise. After completion of the dropwise addition, the reaction was carried out at 130° C. for 2 hours. After the reaction, it was cooled for later use.

[0077] (2) Esterification reaction

[0078] In a 2L round bottom flask, add (1) the polycondensate after the reaction, add 200g of polyether D (polyethylene glycol monomethyl ether 2000, 0.1mol), and 236g of cyclohexane with water agent, install a condenser, and raise the temperature To 100°C, react for 16 hours, cool down to about 60°C, add 200g ...

Embodiment 3

[0082] In this embodiment, B / (A+D)=1:1, A / D=1.0, E / D=1.0.

[0083] (1) Polycondensation reaction

[0084] In a 1000ml four-necked flask equipped with electric mechanical stirring and constant temperature heating oil bath, add 43.6g (0.2mol) of phenoxyethanol phosphate A, 27.6g (0.2mol) of phenoxyethanol, 12.5g (0.125mol) of sulfuric acid C ), and stir until it is a homogeneous phase. Subsequently, 24.3 g (0.3 mol) of 37% formaldehyde aqueous solution B was slowly added dropwise. After completion of the dropwise addition, the reaction was carried out at 115° C. for 6 hours. After the reaction, it was cooled for later use.

[0085] (2) Esterification reaction

[0086]In a 2L round bottom flask, add the polycondensate after (1) reaction, add polyether D 600g (polyethylene glycol monomethyl ether 3000, 0.2mol), bring water agent toluene 600g, install a condenser, and heat up to 140 ℃, react for 12 hours, cool down to about 60 ℃, add 200g of water, enter the separation device,...

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Abstract

The invention discloses an anti-clay polymer dispersing agent and a preparation method thereof. The anti-clay polymer dispersing agent is prepared from monomers A, B and E through polymerization, wherein the monomer A is an aromatic compound with carboxy or phosphate groups, the monomer B is aldehyde, and the monomer E is an aromatic compound with sulfonate groups or hydroxyl. The anti-clay polymer dispersing agent has excellent mud resistance.

Description

technical field [0001] The invention relates to a clay-resistant polymer dispersant, a preparation method and an application thereof, and belongs to the technical field of concrete admixtures. Background technique [0002] Water reducer is a kind of polymer dispersant, but it is essentially a kind of surfactant, which mainly improves the fluidity of concrete, controls the setting or hardening time, and improves the strength of concrete, etc. In the process of concrete preparation, it is usually necessary to add much more mixing water than required for hydration or hardening process, however, as the additional water evaporates, it will cause the concrete body to grow voids, thus making the mechanical strength and resistance significantly become worse, so the addition of concrete admixtures, mainly water reducers, is very necessary. [0003] Polycarboxylate superplasticizer is a high-performance superplasticizer. Since the 1980s, great progress has been made in both research ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/28C04B24/24C08G81/00C08G8/18C08G16/02C04B103/40
CPCC04B24/246C04B24/28C04B2103/408C08G8/18C08G16/0225C08G16/0231C08G16/0237C08G16/0243C08G81/00
Inventor 马建峰冉千平王涛王兵亓帅范士敏杨勇
Owner JIANGSU SOBUTE NEW MATERIALS
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