Synthetic method capable of improving cement adaptability of polycarboxylate superplasticizer

A synthesis method and technology of water reducing agent, which are applied in the field of building materials, can solve the problems that the adaptability of cement cannot meet the requirements and the use effect is not good, and achieve the effects of wide adaptability, excellent weather resistance and excellent plastic retention performance of cement.

Inactive Publication Date: 2019-03-08
SUZHOU XINGBANG CHEM BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adaptability of the existing polycarboxylate superplasticizer to

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1:

[0017] Provided is a synthetic method for improving the adaptability of polycarboxylate superplasticizer cement, comprising the steps of: adding a certain amount of methallyl alcohol polyoxyethylene ether or isoprene to a 2000ml four-necked flask equipped with a stirrer The alcohol polyoxyethylene ether monomer and deionized water were heated in a constant temperature water bath with a temperature of 50°C. After all the raw materials were dissolved, the temperature was raised to 80°C, and acrylic acid, sodium methacrylate sulfonate and The initiator, after the drop of the initiator is completed, the reaction is kept for 1 h, wherein the molar ratio of the acrylic acid: the methallyl alcohol polyoxyethylene ether monomer or the isopentyl alcohol polyoxyethylene ether monomer is 4:1, the methallyl alcohol polyoxyethylene ether monomer or the isopentyl alcohol polyoxyethylene ether monomer: the molar ratio of the sodium methacrylate sulfonate is 1:0.3, the ini...

Example Embodiment

[0018] Embodiment 2:

[0019] Provided is a synthetic method for improving the adaptability of polycarboxylate superplasticizer cement, comprising the steps of: adding a certain amount of methallyl alcohol polyoxyethylene ether or isoprene to a 2000ml four-necked flask equipped with a stirrer The alcohol polyoxyethylene ether monomer and deionized water are heated in a constant temperature water bath with a temperature of 60 ° C. After all the raw materials are dissolved and heated to 90 ° C, acrylic acid, sodium methacrylate sulfonate and Initiator, after the initiator is dripped, the reaction is kept for 1.5h, wherein, the molar ratio of the acrylic acid: the methallyl alcohol polyoxyethylene ether monomer or the isopentyl alcohol polyoxyethylene ether monomer is 3.5:1, the molar ratio of the methallyl alcohol polyoxyethylene ether monomer or isopentyl alcohol polyoxyethylene ether monomer: the sodium methacrylate sulfonate is 1:0.5, and the initiator The added amount of th...

Example Embodiment

[0020] Embodiment three:

[0021] Provided is a synthetic method for improving the adaptability of polycarboxylate superplasticizer cement, comprising the steps of: adding a certain amount of methallyl alcohol polyoxyethylene ether or isoprene to a 2000ml four-necked flask equipped with a stirrer The alcohol polyoxyethylene ether monomer and deionized water are heated in a constant temperature water bath with a temperature of 40°C. After all the raw materials are dissolved, the temperature is raised to 70°C, and then acrylic acid, sodium methacrylic sulfonate and sodium methacrylate are added dropwise with a constant current pump. After the initiator is added dropwise, the reaction is incubated for 2 hours, wherein the molar ratio of the acrylic acid: the methallyl alcohol polyoxyethylene ether monomer or the isopentyl alcohol polyoxyethylene ether monomer is 4.5:1, the methallyl alcohol polyoxyethylene ether monomer or isopentyl alcohol polyoxyethylene ether monomer: the mola...

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PUM

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Abstract

The invention discloses a synthetic method capable of improving cement adaptability of a polycarboxylate superplasticizer. The method comprises the following steps: methyl allyl alcohol polyoxyethylene ether monomers or isoamyl allyl alcohol polyoxyethylene ether monomers in water are heated, acrylic acid, sodium methallyl sulfonate and an initiator are added dropwise to an aqueous solution sequentially for a reaction, and the polycarboxylate superplasticizer is obtained by posttreatment. According to the scheme, the prepared polycarboxylate superplasticizer has the advantages of low mixing quantity, high dispersity, high cement adaptability, excellent weather resistance and the like and has excellent flowing retention ability, and the synthetic method is implementable.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a synthesis method for improving the adaptability of polycarboxylate water reducer cement. Background technique [0002] Water reducer is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete basically unchanged. The water reducing agent will disperse the cement particles after being added to the concrete mixture, which can improve its workability, reduce the unit water consumption, improve the fluidity of the concrete mixture, reduce the unit cement consumption, and save cement. Most of the water reducers are anionic surfactants, including lignin sulfonate, naphthalene sulfonate formaldehyde polymer, etc. Polycarboxylate water reducer is also one of them. The adaptability of the existing polycarboxylate water reducer to cement cannot meet the requirements, and the use effect is not good. Contents of the invention [0003] Th...

Claims

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Application Information

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