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

A technology of esterifying polycarboxylic acid and ceramic water reducing agent, which is applied in the field of preparation of ceramic water reducing agent, can solve the problems of poor product stability, high industrial cost, and difficulty in marketization, etc. The effect of product quality

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

The disadvantage of this method is that it is difficult, complicated to separate, and the product stability is poor, it is not easy to market, and the industrial cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 96g of maleic anhydride and add it into 800mL 1,2-dichloroethane, heat to 75°C to dissolve, add 110g 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 with a maleic anhydride content of 38% by mole.

[0030] Mix polyethylene glycol monomethyl ether and styrene maleic anhydride copolymer in proportion so that the maleic anhydride molar ratio of polyethylene glycol monomethyl ether to styrene maleic anhydride copolymer is 1.5:1, at 120 The reaction was carried out at ℃ for 8 hours to obtain an esterified polycarboxylic acid copolymer.

[0031] The above-mentioned copolymer was made into a 30% aqueous solution, and the pH was adjusted to 7.5 with sodium hydroxide, and t...

Embodiment 2

[0034] The modified polycarboxylic acid copolymer obtained in Example 1 was compounded with sodium carbonate at a mass ratio of 1:1 to obtain a composite ceramic water reducer.

[0035] The use of ceramic water reducer is conventional. The addition amount of composite ceramic water reducing agent is 0.3wt%, and when the mass ratio of water slurry is 0.3:1, the water reducing rate reaches 42%. The flow rate of the 2h net slurry can reach 18.9 seconds, and there is no phenomenon of glaze shrinkage.

Embodiment 3

[0037] The modification polycarboxylate copolymer that embodiment 1 obtains and sodium silicate (Na 2 SiO 3 9H 2 O), sodium carbonate are compounded according to the quality of 1: 1.5: 1.5 to obtain a composite ceramic water reducer.

[0038] The use of ceramic water reducer is conventional. Composite ceramic water reducer, the addition amount is 0.3wt%, when the mass ratio of water slurry is 0.3:1, the water reducing rate reaches 46%. The flow rate of the 2h net slurry can reach 17.2 seconds, without glaze shrinkage.

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Abstract

The invention relates to a ceramic water-reducing agent, in particular to an esterfying polycarboxylic acid type ceramic water-reducing agent and a preparation method thereof. The invention adopts the technical scheme as follows: carrying out polymerization reaction to obtain a high-polymer main chain, and introducing a certain proportion of functional group on the main chain through the esterification reaction to form a comb-pattern molecule structure so as to keep high water-reducing rate and not to cause obvious slow release, thereby an esterfying styrene maleic anhydride copolymer is obtained, the copolymer is prepared into solution by self or compounding with inorganic salts, and the solution can be used as the ceramic water-reducing agent. The method has easily-obtained materials, simple process, convenient operation as well as easy marketability and industrial production. The obtained water-reducing agent can obtain high polymer with the comb-pattern structure by esterfying styrene maleic anhydride. A polyether lateral chain has better hydrophilcity and can also play a steric exclusion role and remarkably improve the dispersing performance of the water-reducing agent to mud particles. The efficiency of the compounded water-reducing agent can be further improved.

Description

technical field [0001] The invention belongs to the field of preparation of ceramic water reducers, in particular to an esterified 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. Once, excellent water reducing agents can promote the development of the ceramic industry in the direction of low energy c...

Claims

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Application Information

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IPC IPC(8): C08G81/02C08F222/08C04B35/634
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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