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Synthetic method of aliphatic-series sulfonate high-efficiency water reducer

An aliphatic sulfonate and high-efficiency water-reducing agent technology, applied in the field of polymer synthesis, can solve the problem that the research work on the step-by-step synthesis of aliphatic sulfonate high-efficiency water-reducing agent is not carried out. Conveying, good water reduction enhancement effect, good setting retardation effect

Inactive Publication Date: 2012-08-15
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Nowadays, there are not many researches on the preparation process and reaction mechanism of the step-by-step synthesis of aliphatic sulfonate superplasticizers

Method used

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  • Synthetic method of aliphatic-series sulfonate high-efficiency water reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of the 1# aliphatic sulfonate superplasticizer of this embodiment:

[0019] (1) Preparation of acetone-formaldehyde condensate macromolecules: prepare a mixed solution of formaldehyde: acetone molar ratio 1:1, react for 60min under the conditions of pressure 0.6MPa, temperature 45℃, stirring speed 85r / min, after the condensation reaction is complete , to make acetone-formaldehyde condensation liquid;

[0020] (2) Synthesis reaction of water reducing agent: formaldehyde: acetone-formaldehyde condensation liquid: sodium sulfite according to the molar ratio of 1:1:0.35 (anhydrous sodium sulfite is used as catalyst and sulfonating agent), at a pressure of 0.6MPa and a temperature of 80°C After reacting for 2.5 hours at a stirring rate of 100r / min, dry and distill to obtain a light brown viscous liquid with a water content of 40wt%, which is the 1# aliphatic sulfonate superplasticizer.

Embodiment 2

[0022] The preparation method of the 2# aliphatic sulfonate superplasticizer of this example is the same as that of Example 1, and the specific experimental parameters are shown in Table 1.

Embodiment 3

[0024] The preparation method of the 3# aliphatic sulfonate superplasticizer of this example is the same as that of Example 1, and the specific experimental parameters are shown in Table 1.

[0025]

[0026] Table 1 Experimental parameters of Examples 1 to 3 and performance of the obtained water reducer

[0027]

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Abstract

The invention discloses a synthetic method of an aliphatic-series sulfonate high-efficiency water reducer and belongs to the field of macromolecule synthesis. According to the synthetic method, acetone and methanal serve as condensation units, anhydrous sodium sulfite serves as a catalyst and a sulfonating agent, and the whole preparation process comprises the following steps of: preparation of acetone-methanol condensation compounds, and synthesis and post-processing of a water reducer. The main performance indexes of the aliphatic-series sulfonate high-efficiency water reducer meet the quality requirements on first-rate products in the national standard GB8076-2008 on 'concrete admixture'. Compared with a naphthalene-series high-efficiency water reducer, the aliphatic-series sulfonate high-efficiency water reducer has a better water reduction strengthening effect and especially has better delayed coagulation, thus being applicable to the long-distance delivery of concrete and being beneficial to preparation of high-strength high-performance concrete.

Description

technical field [0001] The invention relates to a two-step method for synthesizing an aliphatic sulfonate high-efficiency water reducer by using anhydrous sodium sulfite, acetone and formaldehyde as main raw materials, belonging to the field of polymer synthesis. Background technique [0002] Water reducer is one of the most widely researched and used concrete admixtures at present. Its basic function is to increase the fluidity of concrete and cement paste, reduce the amount of mixing water and cement, and minimize the water-cement ratio of concrete. And increase the hardening strength of concrete. Aliphatic sulfonate high-efficiency water-reducing agent is a high-water-reducing, high-strengthening water-reducing agent variety, because it has the advantages of good resistance to high-concentration brine solution and high temperature resistance, it was originally used as oil well cement in Europe and the United States The use of drag reducer meets the requirements of good f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G6/02C04B24/16C04B103/30
Inventor 李如燕孙可伟
Owner KUNMING UNIV OF SCI & TECH
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