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Slow-release slump-retaining type polycarboxylic acid high-performance water reducing agent and preparation method thereof

A water-reducing agent and polycarboxylic acid-based technology, which is applied in the field of Xufang slump-preserving polycarboxylic acid high-performance water-reducing agent and its preparation field, can solve the problems of long production time, high production temperature, complicated production process, etc. The effect of energy saving, excellent slump retention performance and wide application range

Inactive Publication Date: 2015-06-10
四川恒泽建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technical solution of the invention still has the problems of complex production process, long production time and high production temperature.

Method used

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  • Slow-release slump-retaining type polycarboxylic acid high-performance water reducing agent and preparation method thereof
  • Slow-release slump-retaining type polycarboxylic acid high-performance water reducing agent and preparation method thereof
  • Slow-release slump-retaining type polycarboxylic acid high-performance water reducing agent and preparation method thereof

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Experimental program
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preparation example Construction

[0030] The preparation method of the polycarboxylate water reducer of the present invention comprises the following steps:

[0031] a. Add the initiator to the isopentenyl polyoxyethylene ether solution, and start dropping A liquid and B liquid at the same time after 3 to 10 minutes;

[0032] b. Control the addition of liquid A and liquid B in 1-2 hours, and then carry out aging reaction, and the aging reaction time is 0.5-1 hour;

[0033] c. After the aging reaction is over, add water to adjust the solid content, and add lye to adjust the pH value to obtain a polycarboxylic acid-based water reducer.

[0034] Wherein, in the isopentenyl polyoxyethylene ether solution described in step a, the mass concentration of the isopentenyl polyoxyethylene ether is 30-60%, and the molecular weight of the isopentenyl polyoxyethylene ether is 2400.

[0035] The preparation method of the polycarboxylic acid-based water reducer of the present invention is an organic polymerization reaction, ...

Embodiment 1

[0042] 1. Preparation of liquid A

[0043] Weigh each component as shown in Table 1, dissolve and mix in water, and prepare A solution I-III.

[0044] Table 1

[0045]

[0046] 2. Preparation of liquid B

[0047] Weigh each component as shown in Table 2, dissolve and mix in water, and prepare B solution I-III.

[0048] Table 2

[0049]

[0050] 3. Preparation of polycarboxylate water reducer

[0051] Prepare the polycarboxylate water reducer respectively according to the following steps:

[0052] a. Slowly add 300 g of isopentenyl polyoxyethylene ether (molecular weight: 2400) into water, keep stirring during this process, and continue to stir for 0.5 hours after adding the macromonomer to fully dissolve the macromonomer to obtain isopentenyl Polyoxyethylene ether solution, its mass concentration is shown in Table 3;

[0053] b. Add an initiator to the isopentenyl polyoxyethylene ether solution, and start to drop A liquid and B liquid at the same time after 5 minut...

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Abstract

The invention relates to a slow-release slump-retaining type polycarboxylic acid high-performance water reducing agent and a preparation method of the slow-release slump-retaining type polycarboxylic acid high-performance water reducing agent, and belongs to the technical field of concrete admixtures. The reducing agent is characterized in that a polycarboxylate-type water reducing agent is provided and the polycarboxylate-type water reducing agent comprises the following components in parts by weight: 300 parts of isoamyl alkenyl polyoxyethylene ether, 1.5-3 parts of initiating agents, 93-164 parts of liquid A, and 64-137 parts of liquid B, wherein the liquid A is prepared from acrylic acid, hydroxyethyl acrylate, hydroxy-propyl acrylate, 2-acrylamido-2-methyl propane sulfonic acid (AMPS) and water; and the liquid B is prepared from a chain transfer agent and water. The water reducing agent is the slow-release slump-retaining type polycarboxylic acid high-performance water reducing agent; the slow-release slump-retaining type polycarboxylic acid high-performance water reducing agent is high in adaptability, and high in slump-retaining performance; moreover, the production process is a constant-temperature process, the heating is not needed so that the energy sources are saved; and compared with the prior art, the slow-release slump-retaining type polycarboxylic acid high-performance water reducing agent has the advantages that the production period is greatly shortened, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a slump-retaining polycarboxylate high-performance water reducer and a preparation method thereof, belonging to the technical field of concrete admixtures. Background technique [0002] High-performance water reducer is an indispensable component for the preparation of high-performance concrete. The high performance of the water reducing agent means that it not only has a high water reducing rate and the performance of maintaining the slump of concrete for a long time, but also enables the configured concrete to have good mechanical properties and excellent durability. The improvement of performance can not only improve the mechanical properties of high performance concrete to a great extent, but also further improve the construction performance. Polycarboxylate high-performance water reducer represents the future development direction of concrete admixture due to its excellent performance and green environmental protection ch...

Claims

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Application Information

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IPC IPC(8): C04B24/16C08F283/06C08F220/28C08F220/06C08F220/58C08F4/40C08F2/38C04B103/30
Inventor 任豪王涛袁慧莉贺泽生薛彐英陈鹏明王敏
Owner 四川恒泽建材有限公司
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