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Polycarboxylate-type water-reducing mother solution and preparation method thereof

A polycarboxylate-based, jellyfish-reducing technology, applied in the field of concrete materials, can solve problems such as inability to meet water reduction requirements, and achieve the effects of improving slump retention performance and adaptability, reducing costs, and reducing resource consumption

Active Publication Date: 2020-09-22
GUANGZHOU KRYSTIC BUILDING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its water reduction rate can only reach 30%, which cannot meet the increasing demand for water reduction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This embodiment provides a polycarboxylic acid-based water-reducing mother liquor and a preparation method thereof.

[0052] Wherein, in parts by weight, the raw materials for preparing the water-reducing mother liquor include: 32 parts of isopentenol polyoxyethylene ether, 1 part of isomeric ester, 4.4 parts of acrylic acid, 0.2 parts of ammonium persulfate, α-alkenylsulfonic acid 0.9 parts of sodium, 0.05 parts of sodium bisulfate, 0.05 parts of sodium hypophosphite, 2 parts of binder and 59.4 parts of water.

[0053] The preparation method is as follows:

[0054] 1) Mix sodium bisulfate, sodium hypophosphite and 4 parts of water to obtain material A; mix acrylic acid, isomeric ester and 1.2 parts of water to obtain material B;

[0055] 2) Mix prenol polyoxyethylene ether, sodium α-olefin sulfonate, binder, part B material and 30 parts of water for 3 minutes, then add ammonium persulfate, and mix for 3 minutes, wherein, the The mass of material B is 100%, and the ma...

Embodiment 2

[0057] This embodiment provides a polycarboxylic acid-based water-reducing mother liquor and a preparation method thereof.

[0058] Wherein, in parts by weight, the raw materials for preparing the water-reducing mother liquor include: 35 parts of isopentenol polyoxyethylene ether, 2 parts of isomeric esters, 5 parts of acrylic acid, 0.25 parts of ammonium persulfate, α-alkenyl sulfonic acid 1 part of sodium, 0.04 part of sodium bisulfite formaldehyde, 0.02 part of sodium bisulfate, 2 parts of binder and 54.69 parts of water.

[0059] The preparation method is as follows:

[0060] 1) Mix sodium bisulfoxylate formaldehyde, sodium bisulfate and 5 parts of water to obtain material A; mix acrylic acid, isomeric ester and 1.5 parts of water to obtain material B;

[0061] 2) Mix isopentenol polyoxyethylene ether, sodium a-alkenyl sulfonate, binder, part B material and 25 parts of water for 5 minutes, then add ammonium persulfate, and mix for 2 minutes. The mass of material B is 100...

Embodiment 3

[0063] This embodiment provides a polycarboxylic acid-based water-reducing mother liquor and a preparation method thereof.

[0064] Wherein, in parts by weight, the raw materials for preparing the water-reducing mother liquor include: 25 parts of isopentenol polyoxyethylene ether, 3 parts of isomeric esters, 8 parts of itaconic acid, 0.5 parts of ammonium persulfate, a-alkenyl 1.5 parts of sodium sulfonate, 0.05 parts of sodium bisulfite formaldehyde, 0.03 parts of sodium bisulfate, 3 parts of adhesive and 58.92 parts of water.

[0065] The preparation method is as follows:

[0066] 1) Mix sodium bisulfoxylate formaldehyde, sodium bisulfate and 3 parts of water to obtain material A; mix acrylic acid, isomeric ester and 2 parts of water to obtain material B;

[0067] 2) Mix prenol polyoxyethylene ether, sodium a-alkenyl sulfonate, binder, part B material and 24 parts of water for 10 minutes, then add ammonium persulfate, and mix for 5 minutes. The mass of material B is 100%, ...

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PUM

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Abstract

The invention provides a polycarboxylate-type water-reducing mother solution and a preparation method thereof. The water-reducing mother solution is prepared from the following raw materials: five-carbon polyether, isomeric ester, unsaturated carboxylic acid, an initiator, a catalyst, an adhesive, a reducing agent and water. Isomeric ester is creatively introduced into the polycarboxylate-type water-reducing mother solution to serve as an active monomer; the space structure of polycarboxylic acid molecules is effectively improved; besides, ester groups in the molecular structure of the isomeric ester can be hydrolyzed and slowly released to a certain extent; when the water-reducing mother solution is applied to concrete, the water reducing performance of concrete can be effectively improved, the slump retaining performance and the adaptability of the concrete can also be effectively improved, i.e. the workability of the concrete is effectively improved; meanwhile, the reaction efficiency of the five-carbon polyether and the unsaturated carboxylic acid can be improved, and with the same raw materials, the same production process and the same target performance, the use amount of thefive-carbon polyether can be reduced, the cost can be effectively reduced, and the hidden waste caused by the resource loss can be reduced.

Description

technical field [0001] The invention relates to the technical field of concrete materials, in particular to a polycarboxylic acid-based water-reducing mother liquor and a preparation method thereof. Background technique [0002] With the rapid development of infrastructure, water-reducing agents have been widely used as an indispensable part of concrete, and polycarboxylate-based high-performance water-reducing agents are also good because of their high water-reducing rate. Many advantages such as workability have been widely used. Most of the polycarboxylic acid high-performance water-reducing mother liquors on the market today are synthesized by grafting five-carbon polyether with acrylic acid or methacrylic acid as the main chain, so that the synthesized water-reducing agent mother liquor has good water-reducing performance and easy performance, etc. , but limited by the lack of activity of the existing five-carbon polyether itself, there are still problems such as exces...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F220/10C08F220/06C08F222/02C04B24/26C04B103/30
CPCC04B24/2694C04B2103/302C08F283/065C08F220/10C08F220/06C08F222/02
Inventor 陈廷光雷斌范志锋陈立勇王文波
Owner GUANGZHOU KRYSTIC BUILDING MATERIALS CO LTD