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Aliphatic superplasticizer and preparation method thereof

A high-efficiency water reducer and aliphatic technology, applied in the field of aliphatic high-efficiency water reducer and its preparation, can solve the problems of high production costs, achieve the effects of less harmful impurities, reduced impact, and large production capacity

Active Publication Date: 2018-03-09
佛山柯杰科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide an aliphatic high-efficiency water reducer and its preparation method, aiming to solve the problem of high production cost of existing naphthalene-based high-efficiency water-reducers and melamine-based high-efficiency water reducers. question

Method used

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  • Aliphatic superplasticizer and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] In the preheating pot with cooling water, start the exhaust device to form a slight negative pressure in the system, put in 29 parts of formaldehyde in parts by mass, and then throw in 3.5 parts of sodium metabisulfite, stir and dissolve for about 30 minutes under reflux reaction; then add acetone 8.5 parts, controlled at 30°C~40°C for 30 minutes under reflux to form a mixed solution for later use.

[0032] Add 27 parts of water (25 parts of water, 2 parts of recovered water) into the cooling water and the condensation pot with insulation layer, and then add 9 parts of sodium sulfite, stir evenly to obtain an aqueous solution of sodium sulfite.

[0033] Slowly add the above mixed solution into the sodium sulfite aqueous solution dropwise, let the material naturally heat up to above 75°C in about 20 minutes and maintain a constant temperature under reflux conditions for condensation reaction. The above mixed material is finished in about 3 hours, the heat preservation rea...

Embodiment 2

[0035]In the preheating pot with cooling water, start the tail gas device to form a slight negative pressure in the system, put in 25 parts of formaldehyde in parts by mass, and then throw in 4.5 parts of sodium metabisulfite, stir and dissolve for about 40 minutes; then add 9.5 parts of acetone Parts, controlled at 40~50°C for 30 minutes under reflux to form a mixed solution for later use.

[0036] Add 20.5 parts of water (18.5 parts of water, 2 parts of recovered water) into the cooling water and the condensation pot with insulation layer, and then add 10 parts of sodium sulfite, and stir evenly to obtain an aqueous solution of sodium sulfite.

[0037] Slowly add the above mixed solution into the sodium sulfite aqueous solution dropwise, let the material naturally heat up to 80°C for about 30 minutes and maintain a constant temperature under reflux conditions for condensation reaction, finish adding the above mixed material in about 2 hours, after the heat preservation reacti...

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Abstract

The invention discloses an aliphatic superplasticizer and a preparation method thereof. According to the invention, a molecular structure with high water reducing rate and good slump retaining performance can be obtained mainly by performing condensation reaction on aldehyde and ketone under strong alkaline catalysis, performing sulfomethylation reaction on carbonylation alpha site and introducingsulfonyl, and controlling the optimal mixing proportion, and meanwhile, a cement activating agent is added in the later period so as to improve the performance of the concrete and improve the strength of the concrete, thus obtaining the novel superplasticizer with excellent performance. According to the preparation method disclosed by the invention, reaction is performed at a relatively low temperature, a heat source is not needed, production process equipment is simple, production is steady and quick, yield is high and investment is low; by using low-cost industrial byproduct, namely sodiumsulfite, material cost is lowered; and by adopting high-efficiency tail gas purifying and recycling method and device, emission without the three wastes is achieved, not only is environment improved,but also raw material consumption and production cost are lowered.

Description

technical field [0001] The invention relates to the field of fine chemicals, and mainly relates to an aliphatic high-efficiency water reducer and a preparation method thereof. Background technique [0002] With the advancement of construction science and technology, the development of "high-strength and high-performance concrete technology" (including "ready-mixed concrete application technology", "development and application of superplasticizers", etc.) has been included in the construction industry during the "Ninth Five-Year Plan" period of the Ministry of Construction. To popularize and apply 10 new technologies, it is urgent to develop a series of products such as superplasticizer (superplasticizer), retarding superplasticizer and so on. At the end of the 20th century, the most used high-efficiency water reducer was naphthalene-based high-efficiency water reducer (aromatic). In addition to the shortage of naphthalene in the main raw material industry and its high price,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G16/02C08G16/00C04B24/16
CPCC04B24/166C04B2103/302C08G16/00C08G16/0206
Inventor 梁竹兰柯蕾柯科杰
Owner 佛山柯杰科技实业有限公司
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