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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 fluidity, which can obviously improve the fluidity and workability of concrete, etc., it still has the defects of poor fluidity and poor impermeability

Method used

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  • Polycarboxylic acid water reducing agent and preparation method thereof
  • Polycarboxylic acid water reducing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A polycarboxylate water reducer, the water reducer is made of the following raw materials in parts by weight: 35 parts of polyethylene glycol, 10 parts of methacrylic acid, 0.1 part of hydroquinone, 0.1 part of phenothiazine, 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 this water reducer comprises the following steps:

[0021] (1) Put polyethylene glycol in the reaction pot, dissolve it under water bath conditions, add methacrylic acid, hydroquinone and phenothiazine into the reaction pot, raise the temperature to 90°C, and add concentrated sulfuric acid under the condition of stirring , continue to heat up to 120°C, keep warm for 4h, and fill with nitrogen for 2h to obtain macromonomer polyethylene glycol monomethacrylate;

[0022] (...

Embodiment 2

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

[0026] The preparation method of this water reducer comprises the following steps:

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

Embodiment 3

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

[0032] The preparation method of this water reducer comprises the following steps:

[0033] (1) Put polyethylene glycol in the reaction pot, dissolve it under water bath conditions, add methacrylic acid, hydroquinone and phenothiazine into the reaction pot, raise the temperature to 90°C, and add concentrated sulfuric acid under the condition of stirring , continue to heat up to 120 ° C, keep warm for 4.5 hours, and fill with nitrogen for 2 hours to obtain macromonomer polyethylene glycol monometh...

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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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