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A kind of preparation method of polycarboxylate high performance water reducing agent

A water-reducing agent and high-performance technology, which is used in the preparation of polycarboxylic acid high-performance water-reducing agents, can solve the problems of poor plasticizing effect, large dosage, and poor water reduction, and achieves high thermal stability and production technology. Simple process and long-lasting effect

Active Publication Date: 2022-05-13
山西桑穆斯建材化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water reducing agents currently used in the market have the disadvantages of large dosage, poor water reducing performance, and poor plasticizing effect, which cannot meet the requirements of the market.

Method used

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  • A kind of preparation method of polycarboxylate high performance water reducing agent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of polycarboxylate high-performance water reducer, comprising the following steps:

[0023] Weighing: methacrylic acid 25kg, allyl polyoxyethylene ether 40kg, water-based polyurethane emulsion 43kg, hexafluorobutyl methacrylate 8kg, potassium permanganate 0.2kg, citric acid 0.5kg, aluminum isopropoxide 0.4kg , 40kg of deionized water, 15kg of guar gum solution with a concentration of 25%, and 1kg of nitric acid solution with a concentration of 2%.

[0024] a) First put aluminum isopropoxide into 5kg of deionized water, after it is completely dissolved, add nitric acid solution, stir and mix for 30 minutes, then add half of the guar gum solution, continue to stir and mix for 30 minutes, and the obtained first mixture is ready for use.

[0025] b) Put the water-based polyurethane emulsion into a four-neck flask, add hexafluorobutyl methacrylate dropwise, stir and mix at high speed for 1 hour, then heat the reaction system to 45°C, react for 1 hour aft...

Embodiment 2

[0031] A preparation method of polycarboxylate high-performance water reducer, comprising the following steps:

[0032] Weighing: methacrylic acid 35kg, isopentenol polyoxyethylene ether 46kg, water-based polyurethane emulsion 45kg, hexafluorobutyl methacrylate 10kg, potassium permanganate 0.5kg, H 2 o 2 -V C 1kg, 0.5kg of aluminum isopropoxide, 65kg of deionized water, 5kg of locust bean gum with a concentration of 20%, and 1kg of nitric acid solution with a concentration of 5%.

[0033] a) First put aluminum isopropoxide into 10kg of deionized water, after it is completely dissolved, add nitric acid solution, stir and mix for 30 minutes, then add half of the locust bean gum solution, continue to stir and mix for 20 minutes, the obtained first mixture is ready for use.

[0034] b) Put the water-based polyurethane emulsion into a four-neck flask, add hexafluorobutyl methacrylate dropwise, stir and mix at high speed for 2 hours, then heat the reaction system to 50°C, react f...

Embodiment 3

[0040] A preparation method of polycarboxylate high-performance water reducer, comprising the following steps:

[0041] 30kg of methacrylic acid, 46kg of allyl alcohol polyoxyethylene ether, 45kg of water-based polyurethane emulsion, 9kg of hexafluorobutyl methacrylate, 0.3kg of potassium permanganate, 0.7kg of citric acid, 0.45kg of aluminum isopropoxide, deionized 60kg of water, 15kg of chitosan with a concentration of 23%, and 1kg of nitric acid solution with a concentration of 1%.

[0042] a) First put aluminum isopropoxide into 8kg of deionized water, after it is completely dissolved, add nitric acid solution, stir and mix for 20 minutes, then add half of the chitosan solution, continue to stir and mix for 25 minutes, and the obtained first mixture is ready for use.

[0043] b) Put the water-based polyurethane emulsion into a four-necked flask, add hexafluorobutyl methacrylate dropwise, stir and mix at high speed for 1.5h, then heat the reaction system to 45°C, react for ...

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Abstract

The invention discloses a preparation method of a polycarboxylic acid high-performance water reducer. The raw materials mainly include methacrylic acid, unsaturated polyether, water-based polyurethane emulsion, hexafluorobutyl methacrylate, polymer colloid, dodecyl Sodium sulfonate; the present invention utilizes hexafluorobutyl methacrylate to carry out hydrophobic modification treatment on water-based polyurethane, and polymer colloid is bonded by chemical bonds through esterification grafting to form polysaccharide graft copolymers at the same time. The surface self-assembly of molecular chains of carboxylic acid forms a film layer with high dispersion and high heat resistance. It has the ability to disperse and maintain cement for a long time, slows down the concrete solidification rate during transportation, and has high thermal stability. Long time, environmental protection and non-toxic, convenient storage and transportation, wide source of raw materials, suitable for industrial production.

Description

technical field [0001] The invention relates to a preparation method of a polycarboxylic acid high-performance water reducer, which belongs to the technical field of water reducers. Background technique [0002] Concrete admixtures refer to substances that are added to improve the performance of concrete before or during the mixing of concrete. Because admixtures can effectively improve the performance of concrete and have good economic benefits, they have been widely used in many countries, and their application in engineering has attracted more and more attention, becoming an indispensable material in concrete. Among them, the water reducer is the most important admixture in concrete. It can reduce the mixing water consumption and improve the concrete strength under the condition that the workability of concrete and the amount of cement remain unchanged; or under the condition that the workability and strength remain unchanged. Next, save the amount of cement. However, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38C08F283/06C08F283/00C08F251/00C08F220/06C08F220/24C04B103/30
CPCC04B40/0046C08F283/065C08F283/006C08F251/00C04B2103/302C08F220/24C08F220/06C04B24/045C04B24/32C04B24/282C04B22/08C04B2103/0068C04B24/40C04B22/002C04B24/383C04B24/38C04B22/085
Inventor 李宝华董毅贾万里周尚
Owner 山西桑穆斯建材化工有限公司
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