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Corrosion-inhibiting aliphatic water reducer, and preparation method and application thereof

An aliphatic water reducer and corrosion-inhibiting technology, which is applied in the field of corrosion-inhibiting aliphatic water-reducers and their preparation, can solve the problem of large dosage and lack of corrosion-inhibiting and water-reducing components in corrosion-inhibiting and water-reducing agents Synergistic effect, no obvious competitive advantage in cost, etc., to achieve obvious positioning effect, avoid toxicity and volatility, and improve adsorption and positioning efficiency

Active Publication Date: 2018-11-30
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above compound corrosion inhibitors and water reducers lack the synergistic effect between corrosion inhibitors and water reducers, the dosage is large, and there is no obvious competitive advantage in terms of cost.

Method used

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  • Corrosion-inhibiting aliphatic water reducer, and preparation method and application thereof
  • Corrosion-inhibiting aliphatic water reducer, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: A preparation method of a corrosion-inhibiting aliphatic water reducing agent, including the following steps:

[0028] (1) Put 10 g of sodium bisulfite, 3.5 g of sodium hydroxide and 5.6 g of p-aminobenzene sulfonic acid into a three-necked flask with a reflux condenser, add water to dissolve, and raise the temperature to 55° C. to obtain a mixture I.

[0029] (2) Add 11 g of acetone solution dropwise at constant temperature within 1 hour to prepare sulfonated acetone to obtain mixture II.

[0030] (3) Prepare 12g formaldehyde solution and 5g diethylenetriamine solution, slowly drip one-third formaldehyde solution and one-third diethylenetriamine solution in a three-necked flask, and let the solution react after half an hour when the dripping ends The system slowly rises to 71℃, keeps the temperature for 40 minutes, and continues to slowly drip one-third of the formaldehyde solution and one-third of the diethylenetriamine solution within 90 minutes, and make the tem...

Embodiment 2

[0031] Embodiment 2: A preparation method of a corrosion-inhibiting aliphatic water reducing agent, including the following steps:

[0032] (1) Put 9.5 g of sodium metabisulfite, 4 g of sodium hydroxide and 6 g of p-aminobenzene sulfonic acid into a three-necked flask with a reflux condenser, add water to dissolve, and then raise the temperature to 52° C. to obtain a mixture I.

[0033] (2) Add 10.4 g of acetone solution dropwise at constant temperature within 1 hour to prepare sulfonated acetone to obtain mixture II.

[0034] (3) Prepare 12.5g of formaldehyde solution and 4.8g of diethylenetriamine solution, slowly add one-third of formaldehyde solution and one-third of diethylenetriamine solution in a three-necked flask, and let the solution finish dripping after half an hour At that time, the reaction system was slowly raised to 68°C, kept for 35 minutes, and continued to slowly drip one-third of the formaldehyde solution and one-third of the diethylenetriamine solution within 90 ...

Embodiment 3

[0035] Embodiment 3: A preparation method of a corrosion-inhibiting aliphatic water reducing agent, including the following steps:

[0036] (1) Put 9 g of sodium bisulfite, 3.6 g of sodium hydroxide and 5.6 g of p-aminobenzene sulfonic acid into a three-necked flask with a reflux condenser, add water to dissolve, and raise the temperature to 55° C. to obtain a mixture I.

[0037] (2) 11.3 g of acetone solution was added dropwise at constant temperature within 1 hour to prepare sulfonated acetone to obtain mixture II.

[0038] (3) Prepare 12.5g formaldehyde solution and 4.5g triethylenetetramine solution, slowly drip one-third formaldehyde solution and one-third triethylenetetramine solution in a three-necked flask, and let the solution dropwise finish after half an hour At this time, the reaction system was slowly raised to 72°C, kept warm for 40 minutes, and continued to slowly drip one-third of the formaldehyde solution and one-third of the triethylenetetramine solution within 90 m...

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Abstract

The invention relates to a corrosion-inhibiting aliphatic water reducer including the following components in parts by weight: 12 parts of acetone, 18-22 parts of formaldehyde, 8-12 parts of a sulfonating agent, 3-5 parts of sodium hydroxide, 2-6 parts of polyamine, 70-90 parts of water and 6-8 parts of p-aminobenzene sulfonic acid. The preparation method of the corrosion-inhibiting aliphatic water reducer includes the following steps: S01, putting the sulfonating agent, sodium hydroxide and p-aminobenzene sulfonic acid into a three-neck flask with a reflux condenser, adding water to dissolve,and heating up to 53 DEG C, to obtain a mixture I; S02, dripping an acetone solution at constant temperature, and preparing a sulfonated acetone, to obtain a mixture II; S03, dripping a formaldehydesolution and a polyamine solution for several times, heating up in the process of dripping, and carrying out heat preservation for a period of time after each time of dripping is completed and continuing the next time of dripping process until all dripping is completed; and S04, heating up to 93 DEG C, and carrying out heat preservation reaction to obtain the product. The water reducer has the advantages of simple production process, high water reduction, low cost, high corrosion inhibition rate and the like.

Description

Technical field [0001] The invention relates to a water reducer, in particular to a corrosion-inhibiting aliphatic water reducer and a preparation method and application thereof. Background technique [0002] With the development of modern building technology, especially the application of high-strength and high-performance concrete, the development and utilization of new, high-efficiency and multifunctional concrete admixtures have become the focus and hotspot of concrete science research. Due to the great advantages of water reducing agent in improving the workability, strength and durability of concrete, it has now become the fifth essential component in concrete. The most researched water reducers began in the 1950s. The most widely used water reducers are lignosulfonate water reducers and naphthalene series superplasticizers, but these two water reducers have obvious shortcomings. For example, the water reduction rate is low, the durability of concrete is affected, and the ...

Claims

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Application Information

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IPC IPC(8): C08G12/40C08G12/06C04B24/16C04B103/30
CPCC04B24/166C04B2103/302C08G12/06C08G12/40
Inventor 何辉蒋亚清陈印文傅欣怡多亚茹
Owner HOHAI UNIV