Phosphoric-acid-base modified polycarboxylic-acid water reducer with high adaptability and preparation method thereof

A phosphoric acid-based, adaptable technology, applied in the preparation of the polycarboxylate superplasticizer, concrete admixtures, phosphoric acid-based modified polycarboxylate superplasticizer, and polycarboxylate superplasticizer fields, can solve the problem of unsatisfactory To improve the anti-sulfate ability and anti-mud ability, improve the adaptability, and improve the adaptability of cement

Active Publication Date: 2016-01-13
SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above technologies have not given specific guidance on how to make polycarboxylate superplasticizers have good resistance to sulfate ions and mud resistance

Method used

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  • Phosphoric-acid-base modified polycarboxylic-acid water reducer with high adaptability and preparation method thereof
  • Phosphoric-acid-base modified polycarboxylic-acid water reducer with high adaptability and preparation method thereof
  • Phosphoric-acid-base modified polycarboxylic-acid water reducer with high adaptability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019]Example 1: In this example, no unsaturated phosphoric acid monomer C is used to synthesize a water reducer, and the product will be used as a base sample for comparison with a water reducer modified with phosphoric acid. The polycarboxylate water reducer described in this embodiment is made from the following raw materials in parts by weight: 72 parts of isopentenol polyoxyethylene ether (TPEG-2400), hydrogen peroxide (30 parts by mass percent can be used) % hydrogen peroxide solution) 2.5 parts, 5.4 parts of acrylic acid, 30 parts of deionized water X for preparing material liquid A, 1.02 parts of reducing agent, 0.4 part of chain transfer agent, 20 parts of deionized water Y for preparing material liquid B, used for dissolving Add 140 parts of deionized water Z of isopentenol polyoxyethylene ether. Among the 1.02 parts of reducing agent, L-ascorbic acid accounts for 0.85 parts, and phosphorous acid accounts for 0.17 parts. The above-mentioned chain transfer agent is o...

Embodiment 2

[0020] Example 2: The reaction conditions of this example are the same as those of Example 1, except that the unsaturated phosphoric acid monomer C is added in this example to modify the water reducing agent. The highly adaptable phosphoric acid-based modified polycarboxylate water reducer of the present invention is made of the following raw materials in parts by weight: 72 parts of isopentenol polyoxyethylene ether (TPEG-2400), hydrogen peroxide (can 2.5 parts, 5.4 parts of acrylic acid, 1.0 parts of unsaturated phosphoric acid monomer C, 30 parts of deionized water X for preparing material liquid A, 1.02 parts of reducing agent, 0.4 parts of chain transfer agent, 20 parts of deionized water Y for preparing material liquid B, and 140 parts of deionized water Z for dissolving prenol polyoxyethylene ether. Among the 1.02 parts of reducing agent, L-ascorbic acid accounts for 0.85 parts, and phosphorous acid accounts for 0.17 parts. The above-mentioned chain transfer agent is o...

Embodiment 3

[0021] Embodiment 3: This embodiment is similar to Embodiment 2, the difference is that the weight parts of unsaturated phosphoric acid monomer C in this embodiment is 2.0 parts.

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Abstract

The invention discloses a phosphoric-acid-base modified polycarboxylic-acid water reducer with high adaptability and a preparation method thereof. The water reducer is prepared from the following raw materials: isopentenol polyoxyethylene ether, hydrogen peroxide, acrylic acid, an unsaturated phosphoric acid monomer, deionized water, a reducing agent, and a chain transferring agent. The chain transferring agent is one of mercaptoethanol, mercaptoacetic acid and mercaptopropionic acid. The unsaturated phosphoric acid monomer is prepared from 2-phosphono-1,2,4-butanetricarboxylic acid, p-toluenesulfonic acid and hydroquinone. The preparation method for the water reducer comprises adding isopentenol polyoxyethylene ether and deionized water into a reaction vessel, uniformly stirring, heating, keeping warm, adding oxygen peroxide, then dropwise adding a material solution by employing a constant-flow pump, continuing to keep warm for reacting for 1-1.5 h after dropwise adding of the material solution is finished, naturally cooling to room temperature, and adjusting the pH value of the obtained product to 5-6 by using an alkaline solution. The phosphoric-acid-base modified polycarboxylic-acid water reducer possesses good sulfate ion resisting capability and sludge resisting capability, thereby satisfying engineering demand.

Description

technical field [0001] The invention relates to a concrete admixture, in particular to a polycarboxylate water reducer, belonging to the technical field of building materials, in particular to a phosphoric acid-based modified polycarboxylate water reducer with high adaptability. The invention also relates to a preparation method of the polycarboxylate water reducer. Background technique [0002] With the vigorous development of my country's construction industry in recent years, concrete admixtures have also been vigorously developed as concrete vitamins. In particular, polycarboxylate superplasticizers that are environmentally friendly and have high water reduction have also been greatly promoted. However, as an auxiliary material, polycarboxylate water reducing is very sensitive to concrete raw materials. However, our country has a vast territory, and all projects basically use local materials, which leads to differences between raw materials and cement. How to effectiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32C08F283/06C08F220/06C08F230/02
Inventor 吴伟汪咏梅叶子刘昭洋王进春
Owner SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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