Polyether-amide type polycarboxylic high-efficiency water reducer and preparation method thereof

The technology of amide type polycarboxylic acid and high-efficiency water reducing agent is applied in the field of concrete admixture, which can solve the problem of high price of amide, and achieve the effects of stable product performance, environmental safety and environmental protection, and simple preparation process.

Inactive Publication Date: 2014-09-10
海南中科翔新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of ready-mixed concrete technology and the improvement of engineering construction quality requirements, this new type of water reducer system is expected to become the development direction of the next generation of high-performance concrete water reducer, but the price of amides is currently relatively high

Method used

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  • Polyether-amide type polycarboxylic high-efficiency water reducer and preparation method thereof
  • Polyether-amide type polycarboxylic high-efficiency water reducer and preparation method thereof
  • Polyether-amide type polycarboxylic high-efficiency water reducer and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] The preparation method of a polyether-amide type polycarboxylic acid superplasticizer of this embodiment includes the following operation steps:

[0029] (1) Add 80 parts by mass of polyetheramine with a weight average molecular weight of 2000 to the reaction kettle, add 2 parts by mass of potassium carbonate under stirring at 0°C, and 4 parts by mass of methacrylic chloride dropwise, and the dropping time is 10 minutes After the dripping, maintain 0°C for 2 hours to obtain a polyetheramine monomer containing an amide structure;

[0030] (2) Add 100 parts by mass of deionized water and 204 parts by mass of isopentenol polyoxyethylene ether with a weight average molecular weight of 2000 to the reactor of step (1), heat up to 70°C, and add to the reactor 2 parts by mass of hydrogen peroxide, and dropwise add a mixed solution consisting of 20 parts by mass of acrylic acid, 4 parts by mass of thioglycolic acid, 0.4 parts by mass of ascorbic acid, and 350 parts by mass of deioniz...

Embodiment 2

[0032] The preparation method of a polyether-amide type polycarboxylic acid superplasticizer of this embodiment includes the following operation steps:

[0033] (1) Add 133 parts by mass of polyetheramine with a weight-average molecular weight of 600 to the reactor, add 3.5 parts by mass of potassium carbonate under stirring at 2°C, and add 7 parts by mass of methacrylic chloride dropwise, and the dropping time is 15 minutes After the dripping, maintain 2°C for 2 hours to obtain a polyetheramine monomer containing an amide structure;

[0034] (2) Add 100 parts by mass of deionized water and 145 parts by mass of prenol polyoxyethylene ether with a weight average molecular weight of 1600 to the reactor of (1), increase the temperature to 55°C, and add 2 to the reactor. Parts by mass of hydrogen peroxide, and dropwise add a mixed solution consisting of 20 parts by mass of acrylic acid, 4 parts by mass of thioglycolic acid, 0.4 parts by mass of ascorbic acid, and 360 parts by mass of d...

Embodiment 3

[0036] The preparation method of a polyether-amide type polycarboxylic acid superplasticizer of this embodiment includes the following operation steps:

[0037] (1) Put 187 parts by mass of polyetheramine with a weight average molecular weight of 1500 into the reactor, add 5 parts by mass of potassium carbonate under stirring at 5°C, and add 10 parts by mass of methacrylic chloride dropwise, and the dropping time is 20 minutes After the dropping, maintain 5°C for 2 hours to obtain a polyetheramine monomer containing an amide structure;

[0038] (2) Add 100 parts by mass of deionized water and 87 parts by mass of prenol polyoxyethylene ether with a weight average molecular weight of 2000 to the reactor of (1), increase the temperature to 75°C, and add 2 to the reactor. Parts by mass of hydrogen peroxide, and dropwise add a mixed solution consisting of 20 parts by mass of acrylic acid, 4 parts by mass of thioglycolic acid, 0.4 parts by mass of ascorbic acid, and 360 parts by mass of ...

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Abstract

The invention belongs to the technical field of concrete additives, and discloses a polyether-amide type polycarboxylic high-efficiency water reducer and a preparation method thereof. The polyether-amide type polycarboxylic high-efficiency water reducer adopts the following structure, wherein R is H or CH3, x=5-15, y=20-50, z=8-16, a=20-150, b=30-1200, and c=10-150. The preparation method of the polyether-amide type polycarboxylic high-efficiency water reducer comprises the following steps of: firstly reacting polyetheramine and acyl chloride monomer to obtain a polyether amine monomer; then adding a polyoxyethylene ether monomer and a carboxyl monomer to carry out radical copolymerization in a water solution under the condition of an initiating agent and a chain transfer agent so as to obtain the polyether-amide type polycarboxylic high-efficiency water reducer with good dispersibility and slump retaining property. The preparation method disclosed by the invention is simple, low in raw material cost and outstanding in economic benefit and environmental benefit without using an organic solvent.

Description

Technical field [0001] The invention belongs to the technical field of concrete admixtures, and specifically relates to a polyether-amide type polycarboxylic acid superplasticizer and a preparation method thereof. Background technique [0002] Economic development and urbanization have increased the demand for high-performance water-reducing agents in the concrete industry year by year. At present, the mainstream product in the polycarboxylic acid water-reducing agent market is the second-generation one-step ether polycarboxylic acid water-reducing agent. The polyether macromonomers used are prenol or isobutenol combined with higher reactivity. The structure of oxyethylene ether. This type of water reducer has a simpler process and more stable performance than the previous generation of ester water reducers. However, due to the limitation of the types of macromonomers, there is little room for improvement in the performance of this type of water reducer. Moreover, the slump ret...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F283/06C08F220/06C04B24/26C04B103/30
Inventor 史珺罗志有吴昆黄晓梅胡德焯
Owner 海南中科翔新材料科技有限公司
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