Sulfamic acid carboxylic ester terminated polyether, and preparation method and application thereof

A technology of sulfamic acid carboxylate and end-capped polyether, which is applied in the field of organic chemistry, can solve problems such as unsatisfactory stacking effects, and achieve the effects of simple and easy-to-obtain production materials, anti-corrosion, and good adaptability

Active Publication Date: 2018-05-22
广东博众建材科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In construction projects, water reducers and rust inhibitors are usually compounded to obtain anti-rust composite pumping agents, but the two properties affect each other, and the superposition effect is not ideal

Method used

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  • Sulfamic acid carboxylic ester terminated polyether, and preparation method and application thereof
  • Sulfamic acid carboxylic ester terminated polyether, and preparation method and application thereof
  • Sulfamic acid carboxylic ester terminated polyether, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] This embodiment provides a sulfamic acid carboxylate-terminated polyether and a preparation method thereof, the method being specifically:

[0034] Arginine, p-toluenesulfonic acid, and methallyl polyoxyethylene ether with a molar ratio of 1.25:2.5:1 are used as raw materials, and the raw materials are esterified at 120°C for 3 hours to obtain sulfamic acid carboxyl Ester-terminated polyether (HPEG-AT).

Embodiment 2

[0036] This embodiment provides the preparation of anti-rust polycarboxylate water reducer ZX-PCE-1, specifically as follows:

[0037] Take 1100 parts (parts by mass) of HPEG-AT prepared in Example 1, add 780 parts by mass of water to it, raise the temperature, and dropwise add ammonium persulfate containing Mixed liquid with acrylic acid (6.5 parts of ammonium persulfate, 80 parts of acrylic acid), aqueous solution of mercaptopropionic acid (3.0 parts of mercaptopropionic acid, 160 parts of water), control the dropping speed, and drop them in 150±10 minutes and 180±10 minutes respectively , keep the temperature at 45±2°C, continue the reaction for 1 hour, cool down to 35°C, add an aqueous solution containing tetraethylenepentamine and arginine (2.5 parts of tetraethylenepentamine, 3.5 parts of arginine, 45 parts of water), Obtained 50% anti-rust polycarboxylate superplasticizer ZX-PCE-1.

[0038] After testing, the water reducer prepared in this example has a pH of 7.8 and a...

Embodiment 3

[0041] This embodiment provides the preparation of anti-rust polycarboxylate water reducer ZX-PCE-2, specifically as follows:

[0042] Take 1100 parts (parts by mass) of HPEG-AT prepared in Example 1, add 780 parts by mass of water, heat up, and add ammonium persulfate and acrylic acid dropwise at a temperature of 45°C±2°C. Mixed solution (6.5 parts of ammonium persulfate, 80 parts of acrylic acid) and aqueous solution of mercaptopropionic acid (3.0 parts of mercaptopropionic acid, 160 parts of water), control the dropping speed, and finish dropping at 150±10 minutes and 180±10 minutes respectively, keep the temperature At 45±2°C, continue to react for 1 hour, cool down to 35°C, add an aqueous solution containing triethylenetetramine and arginine (3.0 parts of triethylenetetramine, 3.5 parts of arginine, 45 parts of water) to obtain the present invention 50% antirust polycarboxylate superplasticizer ZX-PCE-1.

[0043] After testing, the pH was 7.5 and the concentration was 51...

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Abstract

The invention relates to the field of organic chemistry, and concretely relates to a sulfamic acid carboxylic ester terminated polyether, and a preparation method and application thereof. The preparation method of the sulfamic acid carboxylic ester terminated polyether is characterized by preparing the sulfamic acid carboxylic ester terminated polyether by adopting amino acid, para-toluenesulfonicacid and a methyl allyl polyoxyethylene ether as raw materials through esterification reaction. The invention provides an application method, which adopts the compound as a raw material for preparinga polycarboxylate superplasticizer. The prepared superplasticizer is good in performance, solves the problem of a non-ideal combination effect of a superplasticizer and a corrosion inhibitor, and isbeneficial to effectively preventing corrosion of reinforcing steel bars, favorable in rust resistance, and beneficial to effectively reducing premature aging of buildings, improving the durability and the safety of the buildings, and prolonging the final service life of the concrete buildings.

Description

technical field [0001] The invention relates to the field of organic chemistry, in particular to a sulfamic acid carboxylate-terminated polyether, a preparation method and application thereof. Background technique [0002] The performance of polycarboxylate superplasticizer depends on molecular structure, and the formation of molecular structure depends on the corresponding synthetic formula and process. By changing the molecular structure and performance of polycarboxylate superplasticizers through molecular design, different functional polycarboxylate superplasticizers can be obtained. Commonly used functional polycarboxylate water reducers include water reducer, slump retaining water reducer, early strength water reducer, and anti-corrosion polycarboxylate water reducer belongs to special purpose polycarboxylate functional concrete agent. [0003] Reinforced concrete is widely used in various civil engineering, and the corrosion of steel bars is the main reason for the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/333C08G65/334C08F283/06C08F220/06C08F2/38C04B24/16C04B103/30
CPCC04B24/165C04B2103/302C08F2/38C08F283/065C08G65/33306C08G65/3346C08F220/06
Inventor 李崇智章超樊德庆
Owner 广东博众建材科技发展有限公司
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