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A kind of preparation method of viscosity-reducing sulfamate water-reducer

The technology of sulfamic acid salt and p-aminobenzenesulfonic acid is applied in the field of building admixtures, which can solve the problems of reduced dispersion performance, existing influence, difficult construction, etc., and achieves the effects of reducing cohesion, short production cycle and reducing pollution

Active Publication Date: 2020-09-04
KZJ NEW MATERIALS GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with polycarboxylate superplasticizers, the effect of clay on sulfamate superplasticizers is relatively small, but there is still an effect
Therefore, a viscosity-reducing sulfamate water reducer is developed to solve the problem that the existing sulfamate water reducer is affected by clay, causing its viscosity to increase and the dispersion performance to decrease, and to solve the problem of low water-binder ratio concrete. The problem of difficulty in application due to increased viscosity is of great significance

Method used

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  • A kind of preparation method of viscosity-reducing sulfamate water-reducer
  • A kind of preparation method of viscosity-reducing sulfamate water-reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of a viscosity-reducing sulfamate water reducer, comprising the following steps:

[0025] (1) In parts by mass, add 55 parts of p-aminobenzenesulfonic acid, 67 parts of bisphenol A, 25 parts of viscosity reducer and 200 parts of water into the reaction kettle, heat up to 70°C, stir and dissolve, and continue to heat up to no more than 80°C, then slowly add 62 parts of formaldehyde condensing agent dropwise, finish dropping within 2 hours, while keeping the temperature at 80-90°C, after the addition of the condensing agent is completed, keep warm for 1-2 hours;

[0026] (2) After the heat preservation is over, add about 20 parts of sodium hydroxide solution to adjust the pH value of the system to 9-10, and continue the reaction for 2 hours;

[0027] (3) After the reaction is over, add 12 parts of sodium bisulfite and 30 parts of water, continue to heat up to 80-90 °C, and keep warm for 2 hours;

[0028] (4) Cool to room temperature and adjust the pH...

Embodiment 2

[0030] A preparation method of a viscosity-reducing sulfamate water reducer, comprising the following steps:

[0031] (1) In parts by mass, add 42 parts of p-aminobenzenesulfonic acid, 35 parts of phenol, 10 parts of viscosity reducer and 200 parts of water into the reaction kettle, heat up to 70°C, stir to dissolve, and continue to heat up to no more than 80°C , then slowly add 80 parts of acetaldehyde condensing agent dropwise, and finish dropping within 2 hours while keeping the temperature at 80-90°C. After the condensing agent is added dropwise, keep warm for 1-2 hours;

[0032] (2) After the heat preservation is over, add about 15 parts of potassium hydroxide solution to adjust the pH value of the system to 9-10, and continue the reaction for 2 hours;

[0033] (3) After the reaction is over, add 10 parts of sodium sulfite and 30 parts of water, continue to heat up to 80-90°C, and keep warm for 2 hours;

[0034] (4) Cool to room temperature and adjust the pH of the syste...

Embodiment 3

[0036] A preparation method of a viscosity-reducing sulfamate water reducer, comprising the following steps:

[0037] (1) In parts by mass, add 50 parts of p-aminobenzenesulfonic acid, 47 parts of m-xylenol, 22 parts of viscosity reducer and 200 parts of water into the reaction kettle, heat up to 70°C, stir and dissolve, and continue to heat up to no When it exceeds 80°C, slowly add 70 parts of condensing agent (20 parts of furfural, 50 parts of formaldehyde) dropwise, and finish dropping within 2 hours while keeping the temperature at 80-90°C. After the addition of condensing agent is completed, keep it warm for 1-2 hours;

[0038] (2) After the heat preservation is over, add about 18 parts of sodium hydroxide solution to adjust the pH value of the system to 9-10, and continue the reaction for 2 hours;

[0039] (3) After the reaction is over, add 8 parts of sodium metabisulfite and 30 parts of water, continue to heat up to 80-90 °C, and keep warm for 2 hours;

[0040] (4) Co...

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Abstract

The invention discloses a preparation method of a viscosity-reduction type amino sulfonic acid salt water reducing agent. The preparation method comprises the following steps of (1) adding aminobenzene sulfonic acid, a phenolic compound, a viscosity reduction agent and water into a reaction kettle, heating, stirring and dissolving, continuing to heat to the temperature not above 80 DEG C, slowly dripping a condensation agent, completing dripping within 2h, maintaining the temperature to 80 to 90 DEG C, and warming for 1 to 2h after the dripping is finished; (2) adding an alkaline regulator into the obtained material in step (1), adjusting the pH (potential of hydrogen) value to 9 to 10, and continuing to react; (3) adding a reaction terminator and water into the obtained material in step (2), continuing to heat to 80 to 90 DEG C, and warming; (4) cooling the obtained material in step (3) to room temperature, and adjusting the pH value to 7 to 8, so as to obtain the viscosity-reductiontype amino sulfonic acid salt water reducing agent. The viscosity-reduction type amino sulfonic acid salt water reducing agent has the advantages that by adding the viscosity reduction agent, one stable layer of hydration film is formed at the surface of the particle by the phosphate groups with high hydrophilic characteristic on the molecules of the viscosity reduction agent, so as to facilitatethe sliding of the particles; the adhering and gathering property of clay in the concrete is effectively degraded, and the concrete has high fluidity.

Description

technical field [0001] The invention belongs to the technical field of construction admixtures, and in particular relates to a preparation method of a viscosity-reducing sulfamate water reducer. Background technique [0002] In recent years, with the rapid development of concrete technology in the direction of high strength, green and high performance, the water reducing agent as an important part of concrete has also been put forward higher and more comprehensive requirements, and the traditional water reducing agent can no longer meet the requirements. Although the traditional naphthalene-based and melamine-based high-efficiency water-reducing agents are mature in technology, they are obviously insufficient in the preparation of high-performance concrete due to their low water-reducing rate, rapid slump damage, and poor adaptability to cement. It brings a lot of inconvenience to the construction; polycarboxylate superplasticizer has high water reducing rate, strong plastic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G14/073C04B24/22C04B103/30
CPCC04B24/22C04B2103/302C08G14/06
Inventor 赖华珍方云辉林艳梅赖广兴麻秀星郭元强林添兴
Owner KZJ NEW MATERIALS GROUP CO LTD