Sulfonating polycarboxylic acid type ceramic water-reducing agent and preparation method thereof

A technology of ceramic water reducer and sulfonated polycarboxylic acid, which is applied in the field of ceramic water reducer, can solve the problems of poor product stability, high industrial cost, and difficulty in marketization, and achieve convenient operation, reduced moisture content, and improved fluidity Effect

Inactive Publication Date: 2010-01-06
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is to synthesize polymer monomers first, which is difficult, complicated to separate, and the product has poor stability, is not easy to market, and the industrial cost is relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 95g of maleic anhydride and add it into 800mL 1,2-dichloroethane, heat to 75°C to dissolve, add 100g of styrene, 5g of benzoyl peroxide, and 2g of mercaptoethanol, mix in a separatory funnel, drop into a three-necked flask . After dropping, react at 80°C for 2 hours, raise the temperature to 95°C, and react for another 1.5 hours. After cooling down, petroleum ether was added, suction filtered, and dried to obtain a styrene-maleic anhydride copolymer with a maleic anhydride content of 41% by mole.

[0027] The synthesized copolymer is added into 1,2-dichloroethane, stirred and dissolved, and fresh sulfur trioxide is passed through, and then dropped into the reaction solution. The dropwise addition was completed within 30 minutes, and the reaction was continued at room temperature for 2 hours. The product was washed with 1,2-dichloroethane and then with anhydrous ether, and dried in a vacuum oven at 60°C to obtain a sulfonated styrene-maleic anhydride copolymer.

...

Embodiment 2

[0032] Weigh 95g of maleic anhydride and add it into 800mL 1,2-dichloroethane, heat to 75°C to dissolve, add 300g of styrene, 5g of benzoyl peroxide, and 2g of mercaptoethanol, mix in a separatory funnel, drop into a three-necked flask . After dropping, react at 80°C for 2 hours, raise the temperature to 95°C, and react for another 2 hours. After cooling down, petroleum ether was added, suction filtered, and dried to obtain a styrene-maleic anhydride copolymer, and the molar percentage of maleic anhydride was 38%.

[0033] Below with embodiment 1.

[0034] Performance Testing:

[0035] The use of ceramic water reducer is conventional. The water reducing rate of the ceramic water reducing agent reaches 35% when the addition amount is 0.35wt%, and the water slurry mass ratio is 0.3:1. The flow rate of the 2h net slurry can reach 25.8 seconds without glaze shrinkage.

Embodiment 3

[0037] Weigh 95g of maleic anhydride and add it into 800mL 1,2-dichloroethane, heat to 75°C to dissolve, add 500g of styrene, 8g of benzoyl peroxide, and 7g of mercaptoethanol, mix in a separatory funnel, drop into a three-necked flask . After dropping, react at 60°C for 2 hours, raise the temperature to 100°C, and react for another 2 hours. After cooling down, petroleum ether was added, suction filtered, and dried to obtain a styrene-maleic anhydride copolymer, and the molar percentage of maleic anhydride was 39%.

[0038] Below with embodiment 1.

[0039] Performance Testing:

[0040] The use of ceramic water reducer is conventional. The amount of water reducing agent added is 0.5wt%, and the water reducing rate reaches 39% when the mass ratio of water slurry is 0.3:1. The flow rate of the 2h net slurry can reach 29.3 seconds, and there is a slight glaze shrinkage phenomenon.

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Abstract

The invention relates to the preparation of ceramic water-reducing agents, in particular to a sulfonating polycarboxylic acid type ceramic water-reducing agent and a preparation method thereof. The preparation method of the water-reducing agent comprises the following steps: obtaining styrene maleic anhydride copolymer by the reaction of maleic anhydride and styrene, then sulfonating and modifying the copolymer, and finally obtaining the ceramic water-reducing agent. The method has the advantages of easy synthesis, simple operation as well as easy marketization and industrial application. The obtained ceramic water-reducing agent can improve the fluidness of ceramic slurry, enable the ceramic slurry to have appropriate viscosity and good fluidness under the situation of moisture content reduction and avoid phenomena of crawling, and the like.

Description

technical field [0001] The invention belongs to the field of ceramic water reducers, and in particular relates to a sulfonated polycarboxylic acid type ceramic water reducer and a preparation method thereof. Background technique [0002] The ceramic industry is a high-energy-consuming industry, and more than 80% of its energy is used for firing and drying processes. Therefore, a key technical problem faced by the industry is to control the amount of water added in the ceramic slurry as little as possible, while maintaining the proper fluidity and viscosity of the slurry. Ceramic superplasticizer is a kind of ceramic additive, also known as decoagulant, dispersant, diluent or debonding agent. The ceramic water reducer is used to improve the fluidity of the glaze so that it can maintain better process performance when the moisture content is reduced. Therefore, excellent water reducers can promote the development of the ceramic industry in the direction of low energy consump...

Claims

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Application Information

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IPC IPC(8): C08F222/08C08F8/36C04B35/634
Inventor 廖兵庞浩胡美龙付铁柱计红果陈永
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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