Preparation method of high-efficiency polyether organic silicon defoaming agent applied under severe environment

A polyether organosilicon and organosilicon technology, applied in the direction of foam dispersion/prevention, can solve problems such as poor stability, and achieve the effect of stable process and expanded application range

Active Publication Date: 2015-06-24
南京德俊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] In response to the above problems, the purpose of the present invention is to provide a high-efficiency polyether silicone defoamer and a preparation method thereof in a harsh environment. In the preparation process, harmful organic solvents such as toluene are not required, and a self-emulsification method is adopted, and water is a solvent, which is beneficial to Environmental protection and product internationalization should have very good promotional significance; the polyether silicone mother liquor is prepared by synergistically modifying silicone with small molecular monomers and polyethers, and the defoamer obtained by compounding can realize defoaming , Anti-foaming performance, and stability, to solve serious technical problems such as defoaming, anti-foaming, and poor stability of defoamers in harsh environments, especially under high temperature and strong alkali

Method used

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  • Preparation method of high-efficiency polyether organic silicon defoaming agent applied under severe environment

Examples

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example 1

[0015] Example 1: The preparation of the polyether silicone mother liquor is to thoroughly dry the four-neck bottle and pass nitrogen gas for 10 minutes, mix 52 g of allyl polyoxyethylene polyoxypropylene with a molecular weight of about 1200 g / mol with 0.5 g of butyl acrylate and low hydrogen content Put 24g of silicone oil (hydrogen content 0.18%) into a four-neck flask with a stirrer with a thermometer, then raise the temperature to 85°C, add 0.10g of chloroplatinic acid / isopropanol solution dropwise as a catalyst (1g of chloroplatinic acid is dissolved in 50g isopropanol), react for 6-8 hours, and obtain a transparent polyether silicone mother liquor after the reaction. Stir the obtained polyether silicone mother liquor with 46.0g dimethyl silicone oil, 15.0g hydroxy silicone oil, 2.0g white carbon black (HB-630) at 120°C, 300rpm for 1h; then cool to 80°C, add 9.0g OP-10 , 8.0g Span 80 and stirred for 0.5h, and at the same time, 220g of water was added and stirred evenly t...

example 2

[0016] Example 2: The preparation of the polyether silicone mother liquor is to thoroughly dry the four-neck bottle and pass nitrogen gas for 10 minutes, mix 50 g of allyl polyoxyethylene polyoxypropylene with a molecular weight of about 2400 g / mol and 3.0 g of double bond single-blocked polyurethane acrylic acid Ester macromer and low hydrogen-containing silicone oil 7.5g (hydrogen content 0.12%) are put into the four-necked bottle of the stirrer with thermometer, then be warmed up to 80 o C. Add dropwise 0.06g chloroplatinic acid / isopropanol solution as a catalyst (1g chloroplatinic acid dissolved in 50g isopropanol), react for 6-8 hours, and obtain a transparent polyether silicone mother liquor after the reaction. Stir the obtained polyether silicone mother liquor with 40.0g dimethyl silicone oil, 15.0g hydroxy silicone oil, 1.5g white carbon black (HB-630) at 100°C, 300rpm for 1h; then cool to 80°C, add 8.0g OP-10 , 7.0g Tween 80 and stirred for 0.5h, and at the same time,...

example 3

[0017] Example 3: The preparation of the polyether silicone mother liquor is to thoroughly dry the four-necked bottle and pass nitrogen gas for 10 minutes, mix 50 g of allyl polyoxyethylene polyoxypropylene with a molecular weight of about 1200 g / mol with 1.0 g of hydroxyethyl acrylate and low content Put 20g of hydrogen silicone oil (hydrogen content 0.18%) into a four-neck flask with a stirrer with a thermometer, then heat up to 80°C, add dropwise 0.16g of chloroplatinic acid / isopropanol solution as a catalyst (1g of chloroplatinic acid dissolved in 50g isopropanol), react for 6-8h, and the transparent polyether silicone mother liquor is obtained after the reaction is completed. Stir the obtained polyether silicone mother liquor with 40.0g dimethyl silicone oil, 15.0g hydroxy silicone oil, 1.5g white carbon black (HB-630) at 100°C, 300rpm for 1h; then cool to 80°C, add 8.0g OP-10 , 7.0g Span 80, stirred for 0.5h, and at the same time, added 200g of water and stirred evenly ...

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Abstract

The invention relates to a preparation method of a high-efficiency polyether organic silicon defoaming agent applied under the severe environment. The preparation method has the characteristics that acrylate monomers or single-capped end polyurethane acrylate macromolecular monomers containing double bonds and allyl polyether are adopted as a compound modifying agent to modify silicone oil with low hydrogen content, the whole process is table, no solvent is needed, polyether organic silicon mother liquor can be prepared, and the high-efficiency polyether organic silicon defoaming agent is prepared by compounding the polyether organic silicon mother liquor with dimethyl silicone oil, hydroxyl silicone oil, white carbon black, a non-ionic emulsifying agent and deionized water and the like. The defoaming agent emulsion can be applied in defoaming of the industries such as paper making, coating, textile, food, pharmacy and petrochemistry under the severe environments with high temperature and strong alkaline.

Description

technical field [0001] The invention relates to a high-efficiency polyether silicone defoamer used in harsh environments and a preparation method thereof, especially a cationic nano-polymer emulsion prepared by a microemulsion method, which can be used in papermaking, coatings, textiles, food, Defoaming in harsh environments such as high temperature and strong alkali in pharmaceutical and petrochemical industries. Background technique [0002] Foam is a common phenomenon in people's daily life. In washing, fire extinguishing, and some food and beverages, foam can bring convenience to people. In industrial production, due to various reasons, a large amount of foam will be generated, which directly affects the production efficiency. The more prominent, the more serious the consequences. Elimination of harmful foam can use static, decompression (vacuum), heating or pressurization and other methods. However, when it is necessary to eliminate foam quickly and effectively in a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04
Inventor 徐朝华李珩孙宁
Owner 南京德俊新材料科技有限公司
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