Polycarboxylic acid water reducing agent and preparation method thereof

A technology of water reducing agent and polycarboxylic acid, applied in the field of polycarboxylic acid water reducing agent and its preparation, can solve the problems of poor fluidity, poor impermeability and the like

Inactive Publication Date: 2018-06-01
萧县沃德化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the prepared water reducing agent provided by the existing technology has the advantages of high water reducing rate and good flui

Method used

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  • Polycarboxylic acid water reducing agent and preparation method thereof

Examples

Experimental program
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Effect test

Example Embodiment

[0018] Example 1:

[0019] A polycarboxylic acid water reducing agent, which is made of the following parts by weight of raw materials: 35 parts of polyethylene glycol, 10 parts of methacrylic acid, 0.1 part of hydroquinone, 0.1 part of phenothiazine, and ammonium persulfate 4 parts, 1 part of concentrated sulfuric acid, 1 part of calcium hydroxide, 1 part of lithium carbonate, 2 parts of sodium bisulfite, 0.5 part of sulfomethyl phenolic resin, 0.5 part of fulvic acid, appropriate amount of water.

[0020] The preparation method of the water reducing agent includes the following steps:

[0021] (1) Put the polyethylene glycol into the reaction pot, melt it in a water bath, add methacrylic acid, hydroquinone and phenothiazine to the reaction pot, increase the temperature to 90°C, and add concentrated sulfuric acid under stirring , Continue to heat up to 120°C, keep for 4 hours, and fill with nitrogen for 2 hours to obtain the macromonomer polyethylene glycol monomethacrylate;

[0022...

Example Embodiment

[0024] Example 2:

[0025] A polycarboxylic acid water reducing agent, which is made of the following parts by weight of raw materials: 40 parts of polyethylene glycol, 15 parts of methacrylic acid, 1 part of hydroquinone, 0.5 parts of phenothiazine, and ammonium persulfate 9 parts, 5 parts concentrated sulfuric acid, 20 parts calcium hydroxide, 7 parts lithium carbonate, 5 parts sodium bisulfite, 1.5 parts sulfomethyl phenolic resin, 1 part fulvic acid, appropriate amount of water.

[0026] The preparation method of the water reducing agent includes the following steps:

[0027] (1) Put the polyethylene glycol into the reaction pot, melt it in a water bath, add methacrylic acid, hydroquinone and phenothiazine to the reaction pot, increase the temperature to 95°C, and add concentrated sulfuric acid while stirring , Continue to heat up to 125°C, keep for 5 hours, and fill with nitrogen for 2 hours to obtain macromonomer polyethylene glycol monomethacrylate;

[0028] (2) Add macromonom...

Example Embodiment

[0030] Example 3:

[0031] A polycarboxylic acid water reducer, which is made of the following parts by weight of raw materials: 36 parts of polyethylene glycol, 11 parts of methacrylic acid, 0.2 parts of hydroquinone, 0.2 parts of phenothiazine, and ammonium persulfate 5 parts, 2 parts concentrated sulfuric acid, 2 parts calcium hydroxide, 2 parts lithium carbonate, 3 parts sodium bisulfite, 0.8 parts sulfomethyl phenolic resin, 0.8 parts fulvic acid, appropriate amount of water.

[0032] The preparation method of the water reducing agent includes the following steps:

[0033] (1) Put the polyethylene glycol into the reaction pot, melt it in a water bath, add methacrylic acid, hydroquinone and phenothiazine to the reaction pot, increase the temperature to 90°C, and add concentrated sulfuric acid under stirring , Continue to heat up to 120°C, keep for 4.5 hours, and fill with nitrogen for 2 hours to obtain macromonomer polyethylene glycol monomethacrylate;

[0034] (2) Add macromonom...

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Abstract

The invention relates to the field of water reducing agents and in particular relates to a polycarboxylic acid water reducing agent and a preparation method thereof. The water reducing agent is prepared from the following raw materials in parts by weight: 35 to 40 parts of polyethylene glycol, 10 to 15 parts of acrylic acid, 0.1 to 1 part of hydroquinone, 0.1 to 0.5 part of phenothiazine, 4 to 9 parts of ammonium persulfate, 1 to 5 parts of concentrated sulfuric acid, 3 to 8 parts of calcium hydroxide, 1 to 7 parts of lithium carbonate, 2 to 5 parts of sodium hydrogen bisulfite, 0.5 to 1.5 parts of sulfonated phenolic resin, 0.5 to 1 part of fulvic acid and a proper amount of water. According to the water reducing agent provided by the invention, the defects of an existing water reducing agent that the flowability is poor and the anti-permeability is poor are effectively overcome to a certain extent.

Description

technical field [0001] The invention relates to the field of water reducers, in particular to a polycarboxylate water reducer and a preparation method thereof. Background technique [0002] Water reducer is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete. Most of them are anionic surfactants, such as lignosulfonate, naphthalenesulfonate formaldehyde polymer, etc. After being added to the concrete mixture, it can disperse the cement particles, improve its workability, reduce the unit water consumption, improve the fluidity of the concrete mixture; or reduce the unit cement consumption and save cement. [0003] In the patent application CN104119021B published in China, a polycarboxylate water reducer is obtained by mixing the following raw materials in parts by weight: β-naphthalenesulfonate formaldehyde condensate 50-60, polyethylene glycol monomethyl ether Methacrylate 20-30, calcium lignosulfonate 15-25, ethylene oxi...

Claims

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Application Information

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IPC IPC(8): C04B24/26C08G65/332C08F299/02C04B103/30
CPCC04B24/2605C04B40/0039C04B2103/302C08F299/026C08G65/3322C04B22/10C04B24/24C04B24/166C04B22/064
Inventor 马丽涛崔岩王硕
Owner 萧县沃德化工科技有限公司
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