Silane polycarboxylate water-reducing agent and preparation method thereof

A silane type and polycarboxylic acid technology, which is applied in the preparation of silane type polycarboxylate water reducer, silane type polycarboxylate water reducer and water reducer field, can solve the problem of performance decline, poor cement adaptability, admixture mixing In order to achieve the effect of improving the force, good cement adaptability, and avoiding competitive adsorption

Active Publication Date: 2016-08-10
SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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  • Application Information

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Problems solved by technology

However, due to the unevenness of other raw materials in concrete, especially the soluble sulfate in the sand and gravel aggregate and the sulfate contained in the cement admixture, it has a very obvious effect on the water reducing performance of the polycarboxylate superplasticizer. The impact of the admixture directly leads to the increase of the admixture and the decrease of its performance, and also causes the phenomenon of poor adaptability to cement.

Method used

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  • Silane polycarboxylate water-reducing agent and preparation method thereof
  • Silane polycarboxylate water-reducing agent and preparation method thereof
  • Silane polycarboxylate water-reducing agent and preparation method thereof

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preparation example Construction

[0034] Among them, the preparation method includes the following steps:

[0035] (1) Add the above-mentioned polyoxyethylene ether macromonomer, 2-acrylamido-2-methyl-1-propanesulfonic acid and an appropriate amount of deionized water into a three-necked flask according to mass parts, heat and stir to dissolve;

[0036] (2) Dissolve the above-mentioned chain transfer agent and initiator in an appropriate amount of deionized water as part A by mass;

[0037] (3) Add the above-mentioned acrylic acid derivative monomers to an appropriate amount of deionized water to dissolve as B solution according to mass parts;

[0038] (4) Add the above-mentioned silane-based functional monomers to the remaining deionized water to dissolve as C solution according to mass parts;

[0039] (5) After step (1) is completed, heat the three-necked flask to 58-62°C or 78-82°C, and use a constant flow pump to add liquid A and liquid B dropwise in 1.8 to 2 hours; after 3 minutes of reaction Use a constant flow p...

Embodiment 1

[0042] The silane polycarboxylic acid water reducing agent is made of the following mass parts of raw materials:

[0043] Prenol polyoxyethylene ether TPEG-3000 or prenol polyoxyethylene ether TPEG-2400 82 parts, sodium acrylate 9.6 parts, sodium methallyl sulfonate 0.85 parts, sodium persulfate 1.3 parts, silane 6.5 parts of similar monomers, 5 parts of 2-acrylamido-2-methyl-1-propanesulfonic acid, and 145 parts of deionized water.

Embodiment 2

[0045] The silane polycarboxylic acid water reducing agent is made of the following mass parts of raw materials:

[0046] Prenol polyoxyethylene ether TPEG-3000 or prenol polyoxyethylene ether TPEG-2400 80 parts, 9.5 parts of sodium acrylate, 0.3 parts of mercaptopropionic acid, 1.0 part of sodium methallyl sulfonate, allyl 0.4 parts of sodium sulfonate, 1.3 parts of ammonium persulfate, 6.5 parts of silane monomers, and 150 parts of deionized water.

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Abstract

The invention relates to a method for preparing a silane polycarboxylate water-reducing agent, relates to a water-reducing agent in a concrete admixture and belongs to the technical field of building materials. The silane polycarboxylate water-reducing agent is prepared from polyoxyethylene ether macromonomer, sodium acrylate or a derivative monomer thereof, chain transfer agents, initiators, a silane functional monomer, 2-acryloyl amino-2-methyl-1-propane sulfonic acid and deionized water. The chain transfer agents are thioglycolic acid, mercaptopropionic acid, sodium methallyl sulfonate and sodium allylsulfonate. The initiators are sodium persulfate and ammonium persulfate. Silane monomer maleic anhydride and triethoxy silane propylamine are prepared through amidation. The silane polycarboxylate water-reducing agent is novel in molecular structure design, high in sulfate resistance and good in concrete material adaptability. The product has an obvious sulfate resistance effect while having a high performance water-reducing effect.

Description

Technical field [0001] The invention relates to a water reducer in a concrete admixture, belonging to the technical field of building materials, in particular to a silane type polycarboxylic acid water reducer, and a preparation method of a silane type polycarboxylic acid water reducer. Background technique [0002] At present, polycarboxylic acid water-reducing agents are widely used in various types of engineering fields. In many concrete projects, polycarboxylic acid-based high-performance water-reducing agents have super-dispersibility and have obvious advantages in maintaining slump. It has good fluidity and retention at low content, and improves the workability and durability of concrete. In addition, the synthesis process of polycarboxylate high-performance water-reducing agent is simple, and the raw materials are non-toxic to the environment, which is in line with the development direction of modern concrete. However, due to the unevenness of other raw materials in concr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F230/08C08F228/02C08F220/58C04B24/16C04B103/30
CPCC04B24/165C04B2103/302C08F230/08C08F283/065C08F220/06
Inventor 刘昭洋汪咏梅李欢欢刘旭飞
Owner SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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