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Water reducing agent capable of reducing viscosity of slurry as well as preparation method and application thereof

A water-reducing agent and viscosity technology, applied in the field of water-reducing agent preparation, can solve the problems affecting the fluidity and viscosity of ceramic mud, molecular weight distribution and molecular structure uncontrollable, etc., to promote high quality, good fluidity, and reaction process. controllable effect

Inactive Publication Date: 2013-09-04
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the most researched polymer water reducer is polycarboxylate polymer water reducer, and polycarboxylate polymer ceramic water reducer is mainly obtained by free radical polymerization, and its molecular weight, distribution and molecular structure cannot be determined. Controlling, affecting the fluidity and viscosity of ceramic slurries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 30g of acrylic acid, 1.5g of itaconic acid and 200mL of deionized water into a three-necked flask, then add 0.3g of S,S'-bis(α,α'-methyl-α''-acetic acid) trithiocarbonate, Raise the temperature to 90°C. After the solution is stirred and dissolved, remove the air from the solution. Under the protection of argon, add 0.15 g of azobisisocyanovaleric acid into the solution, and react at constant temperature for 3 hours; cool the system to 50°C, and use a mass fraction of A 50% NaOH solution was used to adjust the pH of the system to 10, and a ceramic water-reducing agent with water-reducing properties was obtained.

[0037] Performance Testing:

[0038] The use of the water reducing agent is performed according to the conventional method, and the viscosity of the ceramic slurry is characterized by a rotational viscometer test. The amount of superplasticizer added is 0.3wt% of the ceramic blank, and when the water-material ratio is 3:7, the viscosity of the ceramic slur...

Embodiment 2

[0040] Add 30g of acrylic acid, 3g of 2-acrylamide-2-methylpropanesulfonic acid and 200mL of deionized water into a three-necked flask, then add 0.5g of S-1-dodecyl-S'-(α,α'-dimethyl Base-α''-acetic acid) trithiocarbonate, heated to 90 ° C, after the solution was stirred and dissolved, the solution was degassed, and under the protection of argon, 0.15 g ammonium persulfate was added to the solution, and the reaction was carried out at constant temperature for 3 hours; cooling The system was brought to 50°C, and the pH value of the system was adjusted to 10 with a 40% potassium hydroxide solution to obtain a ceramic water-reducing agent with water-reducing properties.

[0041] Performance Testing:

[0042] The use of the water reducing agent is performed according to the conventional method, and the viscosity of the ceramic slurry is characterized by a rotational viscometer test. The amount of superplasticizer added is 0.3wt% of the ceramic blank, and when the water-material r...

Embodiment 3

[0044] Add 60g of acrylic acid, 3g of 2-acrylamide-2-methylpropanesulfonic acid, 6g of itaconic acid acrylic acid and 200mL of deionized water into a three-necked flask, and then add 6g of 2-{[(ethylsulfanyl)thioacyl]} -Sulfuryl butyric acid, heat up to 70°C, after the solution is stirred and dissolved, the air is removed from the solution, under the protection of argon, 0.9g of azobisisocyanovaleric acid is added to the solution, and the reaction is carried out at constant temperature for 4 hours; the system is cooled to At 60°C, the pH value of the system was adjusted to 8 with ammonia water to obtain a ceramic water-reducing agent with water-reducing properties.

[0045] Performance Testing:

[0046] The use of the water reducing agent is performed according to the conventional method, and the viscosity of the ceramic slurry is characterized by a rotational viscometer test. The amount of superplasticizer added is 0.3wt% of the ceramic blank, and when the water-material rat...

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PUM

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Abstract

The invention belongs to the technical field of preparation of water reducing agents, and discloses a water reducing agent capable of reducing viscosity of slurry as well as a preparation method and application of the water reducing agent. The method comprises the following steps of: adding acrylic acid and an unsaturated hydrophilic monomer into water; adding a reversible addition-fragmentation chain transfer (RAFT) reagent; heating, stirring and dissolving; adding an initiating agent to react for 3-5 hours at constant temperature; cooling to be 50-60 DEG C; regulating a pH value to obtain the water reducing agent capable of reducing the viscosity of the slurry. The water reducing agent prepared by the method is applied to ceramic slurries so that moisture content of the slurries is less than 30wt% and the viscosity of the ceramic slurries is reduced to be below 0.18Pa*s; and meanwhile, the slurry has high mobility. The water reducing agent prepared by the method is controlled in reaction process, simple in postprocessing process and can be used for promoting the development of ceramic industries in the high-quality, high-level and low-energy consumption direction.

Description

technical field [0001] The invention belongs to the technical field of water reducer preparation, and in particular relates to a water reducer for reducing slurry viscosity and its preparation method and application. Background technique [0002] The ceramics industry is a high-energy-consuming industry, and more than 80% of its energy consumption lies in the sintering and drying processes, and wet forming technology has become the preferred process for the production of ceramic products. Therefore, a key technical problem facing the industry is to reduce ceramic While increasing the moisture content of the slurry, maintain the proper fluidity and viscosity of the slurry system. Ceramic superplasticizer is a kind of ceramic additive, also known as decoagulant, dispersant, diluent or debonding agent, which is widely used in the process of refining and glaze making in the ceramic industry. [0003] Ceramic water reducer is used to improve the fluidity and stability of ceramic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/58C08F222/02C08F2/38C04B35/634
Inventor 廖兵周守发庞浩邓理刘海露郑景新黄健恒
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI