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Synthesizing method of polycarboxylic acid water reduction agent for refractory material

A technology of refractory materials and synthesis methods, applied in the field of building materials, can solve the problems of no dispersibility, poor applicability, poor dispersibility, etc., and achieve the effect of improving dispersibility

Inactive Publication Date: 2019-03-22
SUZHOU XINGBANG CHEM BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for amorphous refractory castables, the applicability is relatively poor, especially for refractory castable systems containing silica fume. When the mass content of silica fume exceeds 5%, the dispersion performance is often extremely poor or even has no dispersion performance, and the use effect is not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Provide a kind of synthetic method that is used for the polycarboxylate water reducing agent of refractory material, comprise steps are:

[0015] (1) First add quantitative polyethylene glycol and excess methyl acrylate into a four-necked flask, add catalyst, heat up to 85°C, and react for 5 hours, then distill under reduced pressure to remove excess methyl acrylate and excess Methyl alcohol, obtains polyethylene glycol acrylate macromer;

[0016] (2) 0.08 mol of acrylic acid polyethylene glycol prepared from 0.15 mol of acrylic acid, 0.15 mol of sodium allyl sulfonate, 0.01 mol of hydroxyethyl acrylate, 0.15 mol of maleic anhydride, 0.17 mol of acrylamide and step (1) Alcohol ester macromonomer is used as raw material, heated in aqueous solution and initiated copolymerization by potassium persulfate, and reacted at constant temperature at 85°C for 4 hours to obtain polycarboxylate water reducer for refractory materials.

Embodiment 2

[0018] Provide a kind of synthetic method that is used for the polycarboxylate water reducing agent of refractory material, comprise steps are:

[0019] (1) First add quantitative polyethylene glycol and excess methyl acrylate into a four-necked flask, add catalyst, heat up to 80°C, and react for 6 hours, then distill under reduced pressure to remove excess methyl acrylate and excess Methyl alcohol, obtains polyethylene glycol acrylate macromer;

[0020] (2) 0.04 mol of acrylic acid polyethylene glycol prepared from 0.05 mol of acrylic acid, 0.10 mol of sodium allyl sulfonate, 0.05 mol of hydroxyethyl acrylate, 0.03 mol of maleic anhydride, 0.09 mol of acrylamide and step (1) Alcohol ester macromonomer is used as raw material, heated in aqueous solution and initiated copolymerization by potassium persulfate, and reacted at constant temperature at 80°C for 5 hours to obtain polycarboxylate water reducer for refractory materials.

Embodiment 3

[0022] Provide a kind of synthetic method that is used for the polycarboxylate water reducing agent of refractory material, comprise steps are:

[0023] (1) First add quantitative polyethylene glycol and excess methyl acrylate into a four-necked flask, add catalyst, heat up to 90°C, and react for 3 hours, then distill under reduced pressure to remove excess methyl acrylate and excess Methyl alcohol, obtains polyethylene glycol acrylate macromer;

[0024] (2) 0.10 mol of acrylic acid polyethylene glycol prepared by 0.20 mol of acrylic acid, 0.05 mol of sodium allyl sulfonate, 0.03 mol of hydroxyethyl acrylate, 0.18 mol of maleic anhydride, 0.17 mol of acrylamide and step (1) Alcohol ester macromonomer is used as raw material, heated in aqueous solution and initiated copolymerization by potassium persulfate, and reacted at a constant temperature of 95°C for 3 hours to obtain polycarboxylate water reducer for refractory materials.

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Abstract

The invention discloses a synthesizing method of a polycarboxylic acid water reduction agent for a refractory material. The synthesizing method comprises the following steps of (1) enabling polyethylene glycol and methyl acrylate to react, so as to obtain a polyethylene glycol acrylate macromolecular monomer; (2) using acrylic acid, sodium allyl sulfonate, hydroxyethyl acrylate, maleic anhydride,acrylamide and the polyethylene glycol acrylate macromolecular monomer obtained in step (1) as raw materials, heating in a water solution, initializing by an initiator to polymerize, and reacting at constant temperature, so as to obtain the polycarboxylic acid water reduction agent for the refractory material. By adopting the type, the synthesizing method has the advantages that by determining thelength of the branch chain of the polycarboxylic acid water reduction agent, the dispersing property is greatly improved; the prepared polycarboxylic acid water reduction agent can be applied into the refractory material with high content of superfine powder, and can realize the important function in expanding of markets of amorphous refractory castables.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method for synthesizing a polycarboxylate water reducer for refractory materials. Background technique [0002] Refractory materials are used as joint-laying materials for refractory product masonry. According to the material, they can be divided into clay, high alumina, silicon and magnesia refractory mud. In the process of producing refractory materials, adding admixtures can greatly improve the masonry performance of refractory mud, adjust the refractoriness of materials and improve the cohesive force of materials. Polycarboxylate superplasticizer has ultra-dispersion performance, wide application range, and can meet the requirements of various cement-based building materials. However, for amorphous refractory castables, the applicability is relatively poor, especially for refractory castable systems containing silica fume. When the mass content of silica fume exceeds 5%, ...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F220/06C08F220/20C08F222/06C08F220/58C08F228/02C04B24/16C04B103/30
CPCC04B24/165C04B2103/302C08F283/065C08F220/06
Inventor 王香港沈焱钱佳佳毛荣良
Owner SUZHOU XINGBANG CHEM BUILDING MATERIALS
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