A special defoamer for fluorocarbon resin emulsion and preparation method thereof

A technology of fluorocarbon resin emulsion and defoaming agent, which is applied in the direction of foam dispersion/prevention, etc., can solve the problems of low surface tension and easy foaming of fluorocarbon resin emulsion, and achieves low surface tension, excellent thermal stability and compatibility performance. Good results

Active Publication Date: 2016-08-24
安徽柏晨新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a special defoamer for fluorocarbon resin emulsion and its preparation method, which has strong defoaming and antifoaming effects, low surface tension, no volatility, excellent thermal stability, especially compatibility with fluorocarbon resin emulsion Good, and can effectively solve the phenomenon that fluorocarbon resin emulsion is easy to foam during construction

Method used

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  • A special defoamer for fluorocarbon resin emulsion and preparation method thereof
  • A special defoamer for fluorocarbon resin emulsion and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The first step: Take 42g of hydrogen-containing silicone oil, 157.5g of fluorine-containing polyether, and 66.5g of toluene into the reaction kettle, start stirring, slowly raise the temperature to 80-110°C, and slowly add isopropanol, which is a self-made catalyst, dropwise under a nitrogen atmosphere After the solution was dripped and reacted at a constant temperature for 2 hours, the toluene was distilled off under reduced pressure, the temperature was lowered and the material was discharged to obtain a fluorine-containing polyether modified polysiloxane.

[0025] The second step: Take 22.2g of fluorine-containing polyether modified polysiloxane obtained in the first step, 18g of white carbon black, 180g of silicone oil, 1.8g of thickener, and 1.485g of polyether, put them into the reaction kettle, start stirring, Slowly raise the temperature to 80-100°C, emulsify for 2 hours, then add 0.44g of hydroxypropyl methylcellulose and 220g of water, thicken for 0.5 hours, co...

Embodiment 2

[0027] Step 1: Take 60g of silicone oil, 190g of fluorine-containing polyether, and 80g of toluene into the reaction kettle, start stirring, and slowly raise the temperature to 80-110°C. After the reaction at constant temperature for 2.5 hours, the toluene was removed by distillation under reduced pressure, the temperature was lowered and the material was discharged to obtain fluorine-containing polyether modified polysiloxane.

[0028] The second step: Take 22g of fluorine-containing polyether modified polysiloxane obtained in the first step, 28g of white carbon black, 220g of silicone oil, 2.0g of thickener, and 1.665g of polyoxyethylene ether, add them to the reaction kettle, and start stirring , slowly heated up to 80-100°C, emulsified for 3 hours, then added 0.60g of hydroxypropyl methylcellulose and 300g of water, thickened for 1 hour, cooled and discharged to obtain the special defoamer 2 for fluorocarbon resin emulsion.

Embodiment 3

[0030] Step 1: Take 110g of hydrogen-containing silicone oil, 157.5g of fluorine-containing polyether, and 57g of toluene into the reaction kettle, start stirring, slowly raise the temperature to 80-110°C, and slowly add the isopropanol solution of self-made catalyst dropwise under nitrogen atmosphere After dripping, the constant temperature reaction was carried out for 3 hours, the toluene was distilled off under reduced pressure, the temperature was lowered and the material was discharged to obtain fluorine-containing polyether modified polysiloxane.

[0031] Step 2: Take 22g of fluorine-containing polyether modified polysiloxane obtained in the first step, 30g of white carbon black, 240g of silicone oil, 1.8g of thickener, and 1.485g of polyoxyethylene ether, add them to the reaction kettle, and start stirring , slowly heated up to 80-100°C, emulsified for 2 hours, then added 0.11g of hydroxypropyl methylcellulose and 320g of water, thickened for 1 hour, cooled and discharge...

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Abstract

The invention discloses a special defoaming agent for a high-interface fluorocarbon resin emulsion. The special defoaming agent is characterized in that the special defoaming agent comprises the following components in percentage by mass: 3-10% of fluorine-containing polyether modified polysiloxane, 2-7% of white carbon black, 40-60% of methylsilicone oil, 0.27-0.45% of a thickener, 0.22-0.33% of polyoxyethylene ether, 0.016-0.21% of cellulose and 30-45% of water. The special defoaming agent disclosed by the invention has the advantages of strong defoaming and foam-inhibiting efficacy, low surface tension, no volatility, excellent thermal stability and good compatibility with the fluorocarbon resin emulsion, and can effectively solve the problem that the fluorocarbon resin emulsion is liable to foaming in construction process.

Description

technical field [0001] The invention relates to the technical field of auxiliary agent synthesis, in particular to a special defoamer for fluorocarbon resin emulsion and a preparation method thereof. Background technique [0002] Fluorocarbon resin emulsion is a functional water-based polymer material. Because of its extremely low surface tension and hydrophobic effect, it has been widely used in textile, leather, construction and other fields. In recent years, domestic enterprises and colleges and universities have made significant progress in the research and development of functional fluorocarbon emulsions, and achieved important breakthroughs in the field of practice. However, the development of the supporting additives is still in the process of debugging, which brings great difficulties to the industrialization and engineering of fluorocarbon resin emulsion. The special defoamer for fluorocarbon resin emulsion is one of them. Hence the invention. Contents of the inv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D19/04
Inventor 陈奠宇邓昭逸程威范新传
Owner 安徽柏晨新材料科技有限公司
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