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Water-saving water reducing agent as well as preparation method and application thereof

A water-saving agent, water-saving technology, applied in the field of water-saving water-reducing agent and its preparation, can solve the problems of difficult preparation process, complicated separation process, poor product stability, etc., and achieve green products and stable reaction conditions Control and avoid the effect of glaze shrinkage

Active 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

The preparation process of these synthetic methods is difficult, the subsequent separation process is complicated, or the introduction of inorganic salts makes the product poor in stability and difficult to market.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 30g of acrylic acid, 1.5g of allyl glycidyl ether, 0.15g of sodium hypophosphite and 200mL of deionized water into a three-necked flask, heat up to 85°C and stir to dissolve, then add 0.15g of ammonium persulfate dropwise, and keep After reacting at 85°C for 2 hours, add 9g of polyvinyl alcohol 1799, and continue stirring for 0.5 hours. Cool the system to 50°C, and adjust the pH of the system to 10 with a 35% NaOH solution to obtain a water-saving superplasticizer.

[0035] Performance Testing:

[0036] The use of water reducer is in the usual way. The water-reducing performance of the water-reducing agent is represented by the flow time required for the slurry to flow through the filled Tu-4 cup after the ceramic slurry has been left standing for 0 and 0.5 hours. The amount of superplasticizer added is 0.3wt% of the ceramic blank, the moisture content of the obtained slurry is 29wt%, the initial slurry flow rate is 42.5s, and the slurry flow rate is 63.7s after s...

Embodiment 2

[0038] Add 30g of acrylic acid, 4.5g of allyl glycidyl ether, 0.15g of sodium bisulfite and 200mL of deionized water into a three-necked flask, heat up to 85°C and stir to dissolve, then add 0.2g of potassium persulfate dropwise, and keep After reacting at 85°C for 2 hours, add 7g of polyvinyl alcohol 1788 and continue stirring for 0.5 hours. Cool the system to 50°C, adjust the pH of the system to 10 with a NaOH solution with a mass fraction of 35wt%, and obtain a water-saving superplasticizer.

[0039] Performance Testing:

[0040] The use of water reducer is in the usual way. The water-reducing performance of the water-reducing agent is represented by the flow time required for the slurry to flow through the filled Tu-4 cup after the ceramic slurry has been left standing for 0 and 0.5 hours. The amount of superplasticizer added is 0.3wt% of the ceramic blank, the moisture content of the obtained slurry is 29wt%, the initial slurry flow rate is 42.9s, and the slurry flow ra...

Embodiment 3

[0042] Add 60g of acrylic acid, 5g of allyl glycidyl ether, 2.5g of allyl polyethylene glycol 400, 2.4g of potassium bisulfite and 200mL of deionized water into a three-necked flask, heat up to 85°C and stir to dissolve, then add dropwise After adding 0.9g of ammonium persulfate, keep the temperature at 70°C for 4h, add 18g of polyvinyl alcohol 1799, and continue stirring for 1h. Cool the system to 40°C, adjust the pH of the system to 8 with a NaOH solution with a mass fraction of 35 wt%, and obtain a water-saving superplasticizer.

[0043] Performance Testing:

[0044] The use of water reducer is in the usual way. The water-reducing performance of the water-reducing agent is represented by the flow time required for the slurry to flow through the filled Tu-4 cup after the ceramic slurry has been left standing for 0 and 0.5 hours. The amount of superplasticizer added is 0.3wt% of the ceramic blank, the moisture content of the obtained slurry is 28wt%, the initial flow rate o...

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Abstract

The invention belongs to the technical field of preparation of a water reducing agent, and discloses a water-saving water reducing agent as well as a preparation method and an application thereof. The method comprises the steps that acrylic acid, allyl glycidyl ether and unsaturated monomers are added into water, then a chain transfer agent is added inside, an initiator is added after heating, the mixture is subjected to a constant-temperature stirring reaction for 2-4 hours, subsequently polyvinyl alcohol is added, and stirring continues for 0.5-1 hour; and cooling is performed, the pH value is adjusted to obtain the water-saving water reducing agent. Based on the method, the reaction conditions are controllable, the post treatment procedures are simple, the water-saving water reducing agent prepared according to the method has obvious water saving effect by keeping the moisture content of ceramic slurry at 29wt% below when used for ceramic production; and meanwhile, with the water-saving water reducing agent, the ceramic slurry is kept good fluidity and proper viscosity, and the phenomena of cut glaze and the like are avoided.

Description

technical field [0001] The invention belongs to the technical field of water-reducer preparation, and in particular relates to a water-saving water-reducer and its preparation method and application. Background technique [0002] The grouting method is one of the molding methods widely used in ceramic production, and in the ceramic sintering molding process, more than 80% of its energy consumption is used for firing and drying processes. Therefore, a key technical problem faced by the industry is Minimize the amount of water added to the ceramic slurry while maintaining 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. Ceramic water reducer is used to improve the fluidity of the slurry, so that it can maintain the fluidity of the slurry system in the case of low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/634C08F220/06C08F283/06
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
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