Defoaming agent suitable for polymer cement waterproof mortar and preparation method thereof

A technology for waterproof mortar and defoaming agent, applied in the field of defoaming agent suitable for polymer cement waterproof mortar and its preparation, can solve problems such as poor compatibility and mortar defects, achieve stable performance, good spreading performance, and improve mechanical properties. The effect of performance and water resistance

Active Publication Date: 2018-12-18
广东南辉新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to develop a defoamer suitable for polymer cement waterproof mortar in view of the shortcomings of poor compatibility between the current organosilicon defoamer and polymer cement waterproof mortar, which will cause defects in the mortar during use. and its preparation method

Method used

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  • Defoaming agent suitable for polymer cement waterproof mortar and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0021] A method for preparing a defoamer suitable for polymer cement waterproof mortar, characterized in that the raw materials are composed of: 80 parts of tetrahydrofuran, 20 parts of ethylenediamine, 12 parts of ethyl orthosilicate, 3 parts of fluorosilane, 8 parts of methyl siloxane, 0.6 parts of emulsifier, 1 part of nonylphenol polyoxyethylene ether, 20 parts of acrylic monomer, 0.1 part of initiator, 2 parts of white carbon black, nano-SiO 2 Airgel 1 part, preservative 0.02 part and deionized water 44 parts.

[0022] As mentioned, the fluorosilane is nonafluoroethyltrimethyloxysilane.

[0023] Said polydimethylsiloxane has a viscosity of 300-400mPa·s.

[0024] As mentioned, nano-SiO 2 The specific surface area of ​​airgel powder is 985.6m 2 / g, the purity is 99%.

[0025] Described, emulsifier is sodium dodecylbenzenesulfonate.

[0026] Described, initiator is potassium persulfate.

[0027] A kind of preparation method that is applicable to the defoamer of polymer...

Embodiment 2

[0034] A method for preparing a defoamer suitable for polymer cement waterproof mortar, characterized in that the raw materials are composed of: 100 parts of tetrahydrofuran, 35 parts of ethylenediamine, 18 parts of ethyl orthosilicate, 5 parts of fluorosilane, 12 parts of methyl siloxane, 4.5 parts of emulsifier, 2 parts of nonylphenol polyoxyethylene ether, 35 parts of acrylic monomer, 1 part of initiator, 5 parts of white carbon black, nano-SiO 2 3 parts of airgel, 0.1 part of preservative and 73 parts of deionized water.

[0035] As mentioned, the fluorosilane is heptadecafluorosilane.

[0036] Said polydimethylsiloxane has a viscosity of 300-400mPa·s.

[0037] As mentioned, nano-SiO 2 The specific surface area of ​​airgel powder is 985.6.8m 2 / g, the purity is 99%.

[0038] Described, emulsifier is sodium dodecylbenzenesulfonate.

[0039] Described, initiator is potassium persulfate.

[0040] A kind of preparation method that is applicable to the defoamer of polymer...

Embodiment 3

[0047] A method for preparing a defoamer suitable for polymer cement waterproof mortar, characterized in that the raw materials are composed of: 120 parts of tetrahydrofuran, 45 parts of ethylenediamine, 24 parts of tetraethyl orthosilicate, 8 parts of fluorosilane, 15 parts of methyl siloxane, 9 parts of emulsifier, 3 parts of nonylphenol polyoxyethylene ether, 55 parts of acrylic monomer, 2 parts of initiator, 8 parts of white carbon black, nano-SiO 2 Airgel 5 parts, preservative 3 parts and deionized water 103 parts.

[0048] As mentioned, the fluorosilane is trifluoromethyltrimethylsilane.

[0049] Said polydimethylsiloxane has a viscosity of 300-400mPa·s.

[0050] As mentioned, nano-SiO 2 The specific surface area of ​​airgel powder is 345.8m 2 / g, the purity is 99%.

[0051] Described, emulsifier is sodium dodecylbenzenesulfonate.

[0052] Described, initiator is potassium persulfate.

[0053] A kind of preparation method that is applicable to the defoamer of polym...

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Abstract

The invention relates to a defoaming agent suitable for polymer cement waterproof mortar and a preparation method thereof. The adaptability of the existing defoaming agent and the polymer cement-basedmortarareis poor in adaptabilityto the polymer cement-based mortar, so that thelikely to cause defects such as sinkhole, micro cracksof the mortar are easily causedsuch as sinkhole, micro cracks andthe like, andlikely to cause the decrease of mechanical performance and waterproof performance of the mortarare further easilycaused. The organic silicone defoaming agent is modified by virtue of acrylate monomers, so that the defoaming agent is better suitable for the alkaline condition of the polymer cement-based mortar, and the compatibility between the polymer cement-based mortar and the defoaming agent can be effectively optimized; and moreover, the defoaming agent is small in solubility and good in laying performance, high in foam inhibiting and foam eliminating performance, and capableof significantly improving the defoaming efficiency. Meanwhile, the defoaming agent is stable in performance, easy in storage and transportation and wide in application prospect.

Description

technical field [0001] The invention relates to the technical field of special polymer materials in chemical synthesis, in particular to a defoamer suitable for polymer cement waterproof mortar and a preparation method thereof. technical background [0002] In the 21st century, the operation of industries involving stirring will be accompanied by the generation of foam, such as papermaking, ink, mortar, fermentation, printing and dyeing and other industries. Foam is a coarse dispersed phase of gas in liquid, which will greatly limit industrial production capacity; it will also cause waste of raw materials and products, and affect the quality and performance of products. Therefore, it is usually chosen to add a defoamer to eliminate and suppress the generation of foam in the system by reducing the surface tension. The principle of action of the defoamer is that during the stirring process, it will take away the solution on the adjacent surface when the surface of the solutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B103/50
CPCC04B40/0039C04B2103/50C04B24/00C04B24/121C04B24/40C04B22/126C04B24/42C04B24/32C04B24/04C04B14/064C04B14/062C04B2103/67C04B2103/0068
Inventor 孙叶云
Owner 广东南辉新材料有限公司
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