A kind of anti-clay type naphthalene series water reducing agent and preparation method thereof

A naphthalene-based water-reducing agent and anti-clay technology, which is applied in the field of clay-resistant naphthalene-based water-reducing agent and its preparation, can solve the problems of water-reducing performance reduction and achieve the effect of reducing negative impact and improving adaptability

Active Publication Date: 2017-10-10
广西苏博特新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention aims at the problem that the existing naphthalene-based water-reducer is affected by the clay in the concrete sand and gravel, resulting in a decrease in its water-reducing performance, and provides a clay-resistant naphthalene-based water-reducer. When the clay content in the sand and gravel is high, There is no need to increase the dosage of water reducing agent, and its water reducing performance is still not significantly affected

Method used

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  • A kind of anti-clay type naphthalene series water reducing agent and preparation method thereof
  • A kind of anti-clay type naphthalene series water reducing agent and preparation method thereof
  • A kind of anti-clay type naphthalene series water reducing agent and preparation method thereof

Examples

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Effect test

Embodiment 1

[0036] A clay-resistant naphthalene-based water reducer, the preparation steps of which are as follows:

[0037] (1) Sulfonation: Heat and melt 162kg (1.2kmol) of 95% naphthalene to 140°C, add 180kg (1.8kmol) of 98% concentrated sulfuric acid, and sulfonate at 165±3°C for 2.5 hours;

[0038] (2) Hydrolysis: cool down to 120°C, add 50kg of water, and hydrolyze for 1 hour;

[0039] (3) Condensation: cool down to 95°C, add 24.4kg (0.1kmol) of triphenylmethane, then add 97kg (1.2kmol) of 37% formaldehyde solution, and carry out condensation reaction at 100±3°C for 5.5 hours;

[0040] (4) Neutralization: add 32% sodium hydroxide solution, neutralize the reactant to a pH value of 7-8, and obtain the product.

Embodiment 2

[0042] A clay-resistant naphthalene-based water reducer, the preparation steps of which are as follows:

[0043] (1) Sulfonation: Heat and melt 187kg (1.4kmol) of 96% naphthalene to 130°C, add 178kg (1.8kmol) of 99% concentrated sulfuric acid, and react for sulfonation at 150±3°C for 3.5 hours;

[0044] (2) Hydrolysis: cool down to 105°C, add 140kg of water, and hydrolyze for 1 hour;

[0045] (3) Condensation: cool down to 100°C, add 5.7kg (0.02kmol) of tribenzylmethane, then add 105kg (1.3kmol) of 37% formaldehyde solution, and carry out condensation reaction at 98±3°C for 6 hours;

[0046](4) Neutralization: add 32% sodium hydroxide solution, neutralize the reactant to a pH value of 7-8, and obtain the product.

Embodiment 3

[0048] A clay-resistant naphthalene-based water reducer, the preparation steps of which are as follows:

[0049] (1) Sulfonation: Heat and melt 162kg (1.2kmol) of 95% naphthalene to 140°C, add 190kg (1.9kmol) of 98% concentrated sulfuric acid, and react for sulfonation at 150±3°C for 3.5 hours;

[0050] (2) Hydrolysis: cool down to 135°C, add 70kg of water, and hydrolyze for 1.5 hours;

[0051] (3) Condensation: cool down to 105°C, add 17.5kg (0.06kmol) of tris(phenoxy)methane, then add 130kg (1.6kmol) of 37% formaldehyde solution, and carry out condensation reaction at 105±3°C for 5 hours;

[0052] (4) Neutralization: add 32% sodium hydroxide solution, neutralize the reactant to a pH value of 7-8, and obtain the product.

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Abstract

The invention provides an anti-clay type naphthalene-based water reducer and a preparation method thereof. The molecular nonlinear structure of the anti-clay type water reducer is formed by co-condensation of a monomer containing three benzene rings with a three-pronged structure. A three-dimensional structure formed. When the clay-resistant naphthalene-based water-reducer is applied to mixed concrete, even if the clay content in the concrete sand is relatively high, there is no need to increase the amount of the water-reducer.

Description

technical field [0001] The invention relates to the field of concrete admixtures, in particular to a clay-resistant naphthalene-based water reducer and a preparation method thereof. Background technique [0002] Concrete is the most widely used building material in the world. It is widely used in various projects due to the advantages of cheap and easy raw materials, diversity and adaptability in applications. Modern concrete is usually mixed with sand, stone, cement, mineral admixtures (fly ash, mineral powder, etc.) and admixtures, mixed with water, and hardened. Water reducer is the largest and most widely used concrete admixture. [0003] The role of water reducing agent is to significantly reduce the amount of water added when mixing concrete, and at the same time greatly improve the flow performance of freshly mixed concrete and the strength after hardening, thereby improving the quality of the project. The currently used water reducers mainly include the following t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G16/02C04B24/30C04B103/30
Inventor 吕志锋乔敏佘维娜吴井志冉千平
Owner 广西苏博特新材料科技有限公司
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