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Silane modified polycarboxylate-type water reducing agent as well as preparation method and use method thereof

A polycarboxylic acid-based, silane-modified technology, applied in the field of building materials, can solve problems such as the problem of cement adaptability, promotion and application limitation, etc., and achieve the effects of being conducive to large-scale industrial production, high water reduction rate, and convenient operation.

Active Publication Date: 2015-01-28
SHANGHAI DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the cement adaptability problem caused by the typical polycarboxylate water reducing agent in the prior art and the defect that its popularization and application are greatly limited, and to provide a silane-modified polycarboxylate Water reducing agent, its preparation method and use method

Method used

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  • Silane modified polycarboxylate-type water reducing agent as well as preparation method and use method thereof
  • Silane modified polycarboxylate-type water reducing agent as well as preparation method and use method thereof
  • Silane modified polycarboxylate-type water reducing agent as well as preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Prepare the silane-modified polycarboxylate water-reducer of the present invention according to the following steps:

[0040] (1) Preparation before polymerization: Accurately weigh 180 parts by weight of water, and prepare the following steps for use:

[0041] Configuration of Solution A: Accurately weigh 6 parts by weight of fumaric acid, 5 parts by weight of vinyl phosphate, 1 part by weight of vinyldimethoxysilane, 2.5 parts by weight of vinylethoxysilane, vinylmethyldimethyl 2 parts by weight of oxysilane and 35 parts by weight of water, stirred and mixed evenly, pumped into the head tank A, ready to add dropwise;

[0042] Configuration of solution B: Accurately weigh 0.5 parts by weight of sodium formaldehyde sulfoxylate, 0 parts by weight of trisodium phosphate, 0.8 parts by weight of sodium methylpropene sulfonate and 50 parts by weight of water, mix and stir evenly, and pump into the high level tank B, ready to add;

[0043] Configuration of mixture C: Accura...

Embodiment 2～5

[0050] According to the method and steps of Example 1, prepare the silane-modified polycarboxylate water reducer of the present invention according to the raw material formula and operating parameters in Table 1, and prepare the obtained silane-modified polycarboxylate water reducer according to the addition amount shown in Table 1. The carboxylic acid-based water reducer was added to the cement paste and concrete, and the performance data of the obtained cement paste and concrete are shown in Table 1.

[0051] The raw material formulations and technical indicators of Examples 1-5 are detailed in Table 1 below.

[0052] Table 1 (the numerical values ​​of each raw material component are parts by weight)

[0053]

[0054]

[0055]

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Abstract

The invention discloses a silane modified polycarboxylate-type water reducing agent as well as a preparation method and a use method thereof. The silane modified polycarboxylate-type water reducing agent comprises the following raw material components in parts by weight: 100 parts of methyl alkene butyl polyoxyethylene ether DD-524, 6-10 parts of fumaric acid, 1-5 parts of vinyl phosphate, 1-2.5 parts of vinyl dimethoxy silane, 1-2.5 parts of vinyl ethyoxyl silane, 2-3 parts of vinyl methyl dimethyl oxo silane, 1-1.5 parts of hydrogen peroxide, 0.5-1 part of sodium formaldehyde sulphoxylate, 0-0.2 part of trisodium phosphate, 0.2-0.8 part of sodium methallyl sulfonate, 1-3 parts of sodium hydroxide and 120-180 parts of water. The silane modified polycarboxylate-type water reducing agent is simple in preparation method, convenient to operate, high in water reduction rate and relatively good in collapse prevention, and the adaptability problem of cement is solved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a silane-modified polycarboxylate water reducer, a preparation method and a use method thereof. Background technique [0002] Concrete is the largest and most widely used building material in the world. The production and application technology of admixtures is one of the main ways for the progress and development of concrete, and the water reducing agent is the most widely used and the largest amount of admixtures. Polycarboxylate water reducer is the third generation of high-performance water reducer developed after the ordinary water reducer represented by wood calcium and the high-efficiency water reducer represented by naphthalene and sulfamate. It has the advantages of low dosage, high water reducing rate, good fluidity retention, low content of harmful components, good performance of hardened concrete, suitable for configuration of high-performance concrete, etc., and ha...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F222/02C08F230/02C08F230/08C08F228/02C04B24/42C04B103/30
Inventor 徐军罗琼李亚杰高振伟董建国王振波杜辉
Owner SHANGHAI DONGDA CHEM
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