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Polycarboxylic acid water reducing agent and preparation method thereof

A technology of water reducing agent and polycarboxylic acid, which is applied in the field of polycarboxylic acid water reducing agent and its preparation, can solve the problems of difficulty in solving the problems such as the adaptability of aggregates containing mud and the high viscosity of concrete, and achieve the improvement of water reduction rate and water reduction. The effect of increased rate, less dosage

Inactive Publication Date: 2019-02-12
深圳市三绿科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the supply of raw materials in the domestic market is sufficient. These two series of products have shown good performance in terms of water reduction, slump retention and applicability, and can meet the technical requirements of most concrete, but they also have their shortcomings. In addition to being difficult to solve In addition to the adaptability to aggregate mud, the most prominent problem is how to better improve the workability of concrete and the problem of high viscosity of concrete caused by low ash ratio or certain material factors, and how to further improve the concrete early strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation method of polycarboxylate water reducer

[0043] (1) Add 350kg of water and 340kg of polyethylene glycol monomethyl ether to the reactor, stir until the polyethylene glycol monomethyl ether is completely dissolved, then continue to add 2kg of AMPS and stir until completely dissolved to obtain the first mixed solution;

[0044] (2) Configure component A: add 30kg of acrylic acid to 30kg of water and stir evenly to obtain component A;

[0045] (3) Prepare component B: Add 0.5kg of VC and 1kg of mercaptopropionic acid into 110kg of water, stir evenly and dissolve completely to obtain component B;

[0046] (4) Add 1 kg of hydrogen peroxide to the first mixed solution at 30°C, stir well and then add components A and B. Add component A at a constant speed for 3 hours, and add component B at a constant speed for 3.5 hours. After holding for 1.2h;

[0047] (5) After the heat preservation is completed, cool down to 42°C, add 14.7kg of sodium hydroxide, add 50kg...

Embodiment 2

[0049] The preparation method of polycarboxylate water reducer

[0050] (1) Add 360kg of water and 350kg of allyl polyoxyethylene ether to the reactor, stir until the allyl polyoxyethylene ether is completely dissolved, then continue to add 2.2kg of AMPS and stir until completely dissolved to obtain the first mixed solution;

[0051] (2) Configure component A: add 35kg of acrylic acid to 35kg of water and stir evenly to obtain component A;

[0052] (3) Prepare component B: Add 0.7kg of VC and 2kg of thioglycolic acid into 120kg of water, stir evenly and dissolve completely to obtain component B;

[0053] (4) Add 1.2kg of hydrogen peroxide to the first mixed solution at 35°C, stir well and then add components A and B. Add component A at a constant speed for 3 hours, and add component B at a constant speed for 3.5 hours. Keep warm for 1.4h after completion;

[0054] (5) After the heat preservation is completed, cool down to 43°C, add 7Kg of sodium hydroxide, 8kg of ethanolamine,...

Embodiment 3

[0056] The preparation method of polycarboxylate water reducer

[0057] (1) Add 360kg of water and 370kg of methylalkenyl polyoxyethylene ether to the reactor, stir until the methylalkenyl polyoxyethylene ether is completely dissolved, then continue to add 2.5kg of AMPS and stir until completely dissolved to obtain the first mixed solution;

[0058] (2) Configure component A: add 36kg of acrylic acid to 36kg of water and stir evenly to obtain component A;

[0059] (3) Prepare component B: Add 1kg of VC and 2kg of mercaptopropionic acid into 130kg of water, stir evenly and dissolve completely to obtain component B;

[0060] (4) Add 1.4kg of hydrogen peroxide to the first mixed liquid at 40°C, stir well and then add components A and B. Add component A at a constant speed for 3 hours, and add component B at a constant speed for 3.5 hours. Keep warm for 1.5h after completion;

[0061] (5) After the heat preservation is completed, cool down to 45°C, add 7kg of sodium hydroxide, 8...

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Abstract

The invention discloses a polycarboxylic acid water reducing agent and a preparation method thereof, and relates to the field of concrete additives. The water reducing agent is prepared from the following components: water, a polyether monomer, AMPS, hydrogen peroxide, a neutralizing agent, a component A and a component B; the component A is prepared from acrylic acid and water, and the componentB is prepared from VC, a modifier and water. The water reducing rate of the prepared polycarboxylic acid water reducing agent is further improved by utilizing AMPS in the components synthesizing the polycarboxylic acid water reducing agent. The early-stage strength of cement is remarkably enhanced, and the finally polymerized and formed polycarboxylic acid water reducing agent has good water reducing effect.

Description

technical field [0001] The invention relates to the field of water reducers, more specifically, it relates to a polycarboxylate water reducer and a preparation method thereof. Background technique [0002] Polycarboxylate high-performance water reducer has been developed in my country for more than ten years. At present, it has been maturely applied to various construction projects. The application technology is becoming more and more mature. No matter from the quality and supply of raw materials or various performance indicators of products, they can meet the market demand very well. There are also a variety of varieties. Generally speaking, there are mainly the following systems on the market: MPEG series , APEG series, IPEG series, TPEG series, VPEG series, gender series. Considering the cost performance of the product and the supply of raw materials among the many varieties, at present the main products in China are IPEG series and TPEG series. [0003] At present, the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C04B24/26C04B103/30
CPCC04B24/2605C04B2103/302C08F283/06C08F220/06
Inventor 庞森林庞永献易钢招吕乾
Owner 深圳市三绿科技有限公司
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