Preparation method of high-efficiency water-based silicon polyether defoaming agent

A polyether defoamer, water-based silicon technology, applied in separation methods, chemical instruments and methods, foam dispersion/prevention, etc. problem, to achieve the effect of increasing the anti-foaming time, excellent anti-foaming and anti-foaming performance, and shortening the anti-foaming time

Pending Publication Date: 2021-05-28
安徽博纳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

[0006] In many industrial production fields, such as papermaking, textile printing and dyeing, oil processing, sewage treatment, oil exploration and transportation, etc., the defoamers that need to be used have good defoaming and foam suppression functions at the same time. Silicone defoamers break foam Strong force and fast defoaming speed, but weak antifoaming ability; polyether defoaming agent has weak defoaming ability and strong antifoaming ability, neither of which can well meet production needs

Method used

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  • Preparation method of high-efficiency water-based silicon polyether defoaming agent
  • Preparation method of high-efficiency water-based silicon polyether defoaming agent

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preparation example Construction

[0030] Specifically, the embodiment of the present invention provides a method for preparing a high-efficiency water-based silicon polyether defoamer, comprising the following steps:

[0031] 1) uniformly mixing polydimethylsiloxane and polyether-modified polysiloxane to obtain mixture A;

[0032] 2) Add mixture A, nonionic surfactant and deionized water into a stirred tank, heat up to 75-80°C, stir for 1-2 hours, then cool down to room temperature to obtain mixture B;

[0033] 3) Add a coupling agent and an emulsifier with a mass percentage of 3% and 5% respectively to the mixture B, and pass nitrogen gas into it, and continue to stir for 20 to 30 minutes to obtain a mixture C;

[0034] 4) Mix the thickener and sodium hydroxide aqueous solution evenly, and adjust the pH to 7 to obtain thickened water;

[0035] 5) Slowly add thickening water to mixture C, the mass ratio of thickening water to mixture C is 1:20, stir at 50-65°C for 1-2 hours, then cool down to room temperature...

Embodiment 1

[0047] Mix polydimethylsiloxane and polyether-modified polysiloxane uniformly in a mass ratio of 1:9 to obtain mixture A; mix mixture A, nonionic surfactant and deionized water in a mass ratio of 1: Add 1:3 into the stirring tank, raise the temperature to 75°C, and stir at a speed of 1000r / min for 2h, then cool down to room temperature to obtain a mixture B; add 3% and 5% titanate coupling agent and polyoxyethylene sorbitan monooleate, and nitrogen gas was introduced, and the stirring was continued for 20 to 30 minutes to obtain mixture C; sodium polyacrylate and 10% sodium hydroxide aqueous solution were mixed evenly, and the pH was adjusted to 7. To obtain thickening water; slowly add thickening water to mixture C, the mass ratio of thickening water to mixture C is 1:20, stir at 55°C for 2h, then cool down to room temperature, homogenize for 0.5h, and homogenize under pressure 100MPa, high-efficiency water-based silicone polyether defoamer.

Embodiment 2

[0049] Mix polydimethylsiloxane and polyether-modified polysiloxane uniformly in a mass ratio of 2:9 to obtain mixture A; mix mixture A, nonionic surfactant and deionized water in a mass ratio of 1: Add 1:3 into the stirring tank, raise the temperature to 75°C, and stir at a speed of 1000r / min for 2h, then cool down to room temperature to obtain a mixture B; add 3% and 5% titanate coupling agent and polyoxyethylene sorbitan monooleate, and nitrogen gas was introduced, and the stirring was continued for 20 to 30 minutes to obtain mixture C; sodium polyacrylate and 10% sodium hydroxide aqueous solution were mixed evenly, and the pH was adjusted to 7. To obtain thickening water; slowly add thickening water to mixture C, the mass ratio of thickening water to mixture C is 1:20, stir at 55°C for 2h, then cool down to room temperature, homogenize for 0.5h, and homogenize under pressure 100MPa, high-efficiency water-based silicone polyether defoamer.

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Abstract

The invention is suitable for the technical field of defoaming agents, and provides a preparation method of a high-efficiency water-based silicon polyether defoaming agent; the polydimethylsiloxane and polyether modified polysiloxane are blended into the same system, so that the defoaming capability of polydimethylsiloxane and the foam inhibition capability of polyether modified polysiloxane are fully exerted, and by utilizing the synergistic interaction of the two components, defoaming time of the prepared efficient water-based silicon polyether defoaming agent is greatly shortened, and the foam inhibition time is greatly improved, so that the efficient water-based silicon polyether defoaming agent has excellent defoaming and foam inhibition properties, and can meet the production requirements at lower concentration.

Description

technical field [0001] The invention relates to the technical field of defoamers, in particular to a preparation method of a high-efficiency water-based silicon polyether defoamer. Background technique [0002] The generation of bubbles is involved in many industrial production processes. Most foams will have adverse effects on production, such as reducing production capacity, causing waste of raw materials, reducing product quality, causing operational fluctuations, etc., which will cause economic losses to varying degrees. . Generally speaking, foam is a coarse dispersion of gas in liquid, which belongs to gas-liquid heterogeneous system, and the bulk density is close to gas but not close to liquid gas-liquid dispersion. When there is no surfactant in the liquid, the bubbles will migrate to the surface of the liquid, burst and disappear; when the liquid contains surfactant, the surface of the bubbles will form a film plate and become a stable foam. [0003] Defoamer is a...

Claims

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Application Information

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IPC IPC(8): B01D19/04
CPCB01D19/0409
Inventor 李维格
Owner 安徽博纳新材料科技有限公司
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