Viscosity-reducing shrinkage-reducing type polycarboxylate superplasticizer

A technology of polycarboxylic acid and water reducer, which is applied in the field of building materials, can solve the problems of shrinkage and crack resistance that cannot meet the performance requirements, insufficient water reducing rate, low compressive strength, etc., achieve good dispersion and dispersion retention, reduce Effect of improving viscosity and fluidity

Inactive Publication Date: 2021-01-08
梁剑
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problems that the existing polycarboxylate water-reducing agent has insufficient water-reducing rate, poor dispersibility, low compressive strength, and performance requirements in terms of shrinkage reduction and crack resistance, the present invention provides a viscosity-reducing and shrinkage-reducing polycarboxylate water-reducing agent. agent and its preparation method, and develop a polycarboxylate water reducer with shrinkage reduction performance, high water reduction rate, good dispersion and dispersion retention, high compressive strength, and excellent comprehensive performance in line with market demand and to promote construction The development of energy-saving materials is of great significance

Method used

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  • Viscosity-reducing shrinkage-reducing type polycarboxylate superplasticizer

Examples

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Effect test

Embodiment 1

[0029] A viscosity-reducing and shrink-reducing polycarboxylate water-reducer, comprising the following components in mass percent: amino polyether modified silicone / acetone sulfonate formaldehyde condensate / polyacrylic acid 10%, diethylene glycol monovinyl Polyoxyethylene ether / allyl bisquaternary ammonium salt / acrylic acid / (2-propenyl)succinic anhydride copolymer 30%, the balance is water.

[0030] The preparation method of the amino polyether modified organosilicon / acetone sulfonate formaldehyde condensate / polyacrylic acid comprises the following steps: adding amino polyether modified organosilicon / acetone sulfonate formaldehyde condensate and polyacrylic acid to toluene Into the solution, concentrated sulfuric acid was slowly added dropwise, the temperature was raised to 140° C., refluxed for 13 hours, cooled to room temperature, and concentrated to obtain amino polyether modified silicone / acetone sulfonate formaldehyde condensate / polyacrylic acid.

[0031] The molar ratio...

Embodiment 2

[0043] A viscosity-reducing and shrink-reducing polycarboxylate water reducer, comprising the following components in mass percent: amino polyether modified silicone / acetone sulfonate formaldehyde condensate / polyacrylic acid 11%, diethylene glycol monovinyl Polyoxyethylene ether / allyl bisquaternary ammonium salt / acrylic acid / (2-propenyl)succinic anhydride copolymer 29%, the balance is water.

[0044] The preparation method of the amino polyether modified organosilicon / acetone sulfonate formaldehyde condensate / polyacrylic acid comprises the following steps: adding amino polyether modified organosilicon / acetone sulfonate formaldehyde condensate and polyacrylic acid to toluene Into the solution, concentrated sulfuric acid was slowly added dropwise, the temperature was raised to 145° C., refluxed for 14 hours, cooled to room temperature, and concentrated to obtain amino polyether modified silicone / acetone sulfonate formaldehyde condensate / polyacrylic acid.

[0045] The molar ratio...

Embodiment 3

[0057] A viscosity-reducing and shrink-reducing polycarboxylate water reducer, comprising the following components in mass percent: amino polyether modified silicone / acetone sulfonate formaldehyde condensate / polyacrylic acid 13%, diethylene glycol monovinyl Polyoxyethylene ether / allyl bisquaternary ammonium salt / acrylic acid / (2-propenyl)succinic anhydride copolymer 27%, the balance is water.

[0058] The preparation method of the amino polyether modified organosilicon / acetone sulfonate formaldehyde condensate / polyacrylic acid comprises the following steps: adding amino polyether modified organosilicon / acetone sulfonate formaldehyde condensate and polyacrylic acid to toluene Add concentrated sulfuric acid slowly to the solution, raise the temperature to 150°C, reflux for 15 hours, cool to room temperature, and concentrate to obtain amino polyether modified silicone / acetone sulfonate formaldehyde condensate / polyacrylic acid.

[0059] The molar ratio of amino polyether modified s...

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Abstract

The invention belongs to the technical field of building materials, and relates to a viscosity-reducing shrinkage-reducing type polycarboxylate superplasticizer which is characterized by comprising the following components in percentage by mass: 10-15% of amino polyether modified organic silicon / acetone sulfonate formaldehyde condensate / polyacrylic acid, 25-30% of diethylene glycol monovinyl polyoxyethylene ether / allyl biquaternary ammonium salt / acrylic acid / (2-propenyl)succinic anhydride copolymer and the balance of water. The viscosity-reducing shrinkage-reducing type polycarboxylate superplasticizer developed by the invention has the advantages of shrinkage reducing performance, high water reducing rate, good dispersity and dispersion retentivity, high compressive strength and excellentcomprehensive performance, meets the market requirements, and has very important significance for promoting the development of building energy-saving materials.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a viscosity-reducing and shrinkage-reducing polycarboxylate water-reducer and a preparation method thereof. Background technique [0002] Cement mortar is a common cement-based material. Traditional cement mortar is generally made by mixing cement, fine aggregate and water. In construction engineering, it is mostly used for foundation and wall masonry, indoor and outdoor plastering, etc. With the rapid development of the construction industry, the public has higher and higher requirements for the performance of cement mortar. In order to make up for the lack of performance of traditional cement mortar and give full play to the advantages of cement mortar, various admixtures or admixtures are usually added to cement mortar Perform performance optimization to improve the strength, fluidity and durability of cement mortar. Cement mortar admixture, as an indispensable and...

Claims

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Application Information

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IPC IPC(8): C04B24/42C04B24/32C04B24/26C04B24/16C04B24/12C04B24/04C08F283/06C08F220/06C08F226/02C08F224/00C08G81/02C04B103/30
CPCC04B24/04C04B24/12C04B24/166C04B24/26C04B24/32C04B24/42C04B40/0039C04B2103/302C08F283/065C08G81/025C08F220/06C08F226/02C08F224/00
Inventor 梁剑高权
Owner 梁剑
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