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Preparation method of high performance polycarboxylate water reducer

A technology of polycarboxylic acid series and water reducing agent, applied in the field of building materials, can solve the problems of low adaptability of cement, complex production process, low water reducing rate, etc. Effects of Early and Late Intensity

Inactive Publication Date: 2016-06-08
RIZHAO PORT GRP LANSHAN PORT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the above-mentioned technical problems, the purpose of the present invention is to overcome the problems of polycarboxylate-based water-reducing agent production process is too complex, high cost, low water-reducing rate and low adaptability to cement, etc., to provide a high-performance polycarboxylate The preparation method of water reducer

Method used

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  • Preparation method of high performance polycarboxylate water reducer
  • Preparation method of high performance polycarboxylate water reducer

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Add 50g of water into a 250mL four-neck flask equipped with a thermometer, agitator, dropping funnel, and condenser, and raise the temperature in the water bath to 80°C; dissolve each monomer in 3 times the water according to the ratio as the dripping liquid I , wherein: allyl polyethylene glycol accounts for 50% of the total mass of monomers, polyethylene glycol monomethyl ether methacrylate accounts for 10% of the total mass of monomers, acrylic acid accounts for 30% of the total mass of monomers, propylene Amide accounts for 10% of the total mass of the monomer; ammonium persulfate is taken according to the amount and dissolved in water to form a solution with a mass fraction of 8.0% as the dripping solution II, wherein the amount of ammonium persulfate accounts for 1.5% of the total mass of the monomer; Add dropwise solution I and dropwise solution II dropwise to the flask at the same time, and the dropping time is controlled at 4 hours; after the dropwise addition i...

Embodiment 2

[0028] Add 50g of water into a 250mL four-neck flask equipped with a thermometer, agitator, dropping funnel, and condenser, and raise the temperature in the water bath to 80°C; dissolve each monomer in 3 times the water according to the ratio as the dripping liquid I , wherein: allyl polyethylene glycol accounts for 30% of the total mass of the monomer, polyethylene glycol monomethyl ether methacrylate accounts for 20% of the total mass of the monomer, acrylic acid accounts for 40% of the total mass of the monomer, propylene Amide accounts for 10% of the total mass of the monomer; ammonium persulfate is taken according to the amount and dissolved in water to form a solution with a mass fraction of 8.0% as the dripping solution II, wherein the amount of ammonium persulfate accounts for 1.5% of the total mass of the monomer; Add dropwise solution I and dropwise solution II to the flask at the same time, and the dropwise addition time is controlled at 4 hours; after the dropwise a...

Embodiment 3

[0030] Add 50g of water into a 250mL four-neck flask equipped with a thermometer, agitator, dropping funnel, and condenser, and raise the temperature in the water bath to 80°C; dissolve each monomer in 3 times the water according to the ratio as the dripping liquid I , wherein: allyl polyethylene glycol accounts for 40% of the total mass of the monomer, polyethylene glycol monomethyl ether methacrylate accounts for 18% of the total mass of the monomer, acrylic acid accounts for 37% of the total mass of the monomer, propylene Amide accounts for 5% of the total mass of the monomer; ammonium persulfate is taken according to the amount and dissolved in water to form a solution with a mass fraction of 8.0% as the dripping liquid II, wherein the amount of ammonium persulfate accounts for 1.5% of the total mass of the monomer; Add dropwise solution I and dropwise solution II to the flask at the same time, and the dropwise addition time is controlled at 4 hours; after the dropwise addi...

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Abstract

The invention relates to a preparation method of a high-performance polycarboxylic acid-based water-reducer, which uses ammonium persulfate as an initiator and copolymerizes monomers in an aqueous solution system, and the amount of ammonium persulfate accounts for the total amount of monomers. 0.5-10.0% by mass; wherein the monomers include allyl polyethylene glycol, polyethylene glycol monomethyl ether methacrylate, acrylic acid and acrylamide. The preparation of the polycarboxylate water-reducing agent of the present invention adopts the method of free radical polymerization, using water as the solvent, the process is simple and easy to control, and there is no industrial waste; and the product performance is excellent, with low dosage, high water-reducing rate, The slump loss is small, the adaptability to cement is strong, and the early and late strength of concrete are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and more specifically, the invention relates to a preparation method of a high-performance polycarboxylate water reducer. Background technique [0002] With the vigorous development of my country's infrastructure construction, the performance of all aspects of concrete necessary for infrastructure construction is also constantly improving, and at the same time, the requirements for concrete water reducing agents are also getting higher and higher. Polycarboxylate superplasticizer is the third generation of high-performance superplasticizer, which has the characteristics of low dosage, high water reducing rate, small slump loss, and good adaptability to cement. Polycarboxylate water reducer can greatly increase the amount of mixed materials such as fly ash and mineral powder. It is green and environmentally friendly, can greatly save cement, and has the advantages of high-strength and u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C04B24/26C04B103/30
Inventor 高明马先彬李华山张孝波何西华程永荣曹传红陈静王细美范开拓
Owner RIZHAO PORT GRP LANSHAN PORT
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