A silicone defoamer

A technology of organosilicon defoaming agent and hydroxy silicone oil, which is applied in the field of organosilicon defoaming agents, can solve the problems of difficult balance between stable compatibility and defoaming performance, and achieve excellent stable compatibility and defoaming performance, Effect of improved flow and wettability, excellent defoaming properties

Active Publication Date: 2021-04-20
广东省科学院产业技术育成中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing polyether modified silicone defoamers have the following defects: stable compatibility and defoaming performance are difficult to balance the relationship between the two

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The second aspect of the present invention provides a kind of preparation method of described organosilicon defoamer, and the step comprises at least: (1) polydimethylsiloxane, hydroxyl silicone oil, white carbon black are added in the container, Stir evenly at 180-240°C to obtain a stirred mixture; (2) Add water, modified polyether, and emulsifying dispersant to the stirred mixture, and add a platinum catalyst accounting for 0.01-0.05% of the total mass of the reaction raw materials, and react 2 -5 hours; (3) Cool down to 60-100°C, add a thickener, and stir at 3000-5000r / min for 15-30min to obtain a silicone defoamer.

[0034] Preferably, the steps of the preparation method of the silicone defoamer include at least: (1) adding polydimethylsiloxane, hydroxy silicone oil, and white carbon black into a container, and stirring evenly at 210° C. to obtain Stirring the mixture; (2) adding water, modified polyether, and emulsifying dispersant to the stirring mixture, adding 0...

Embodiment 1

[0039] A kind of organic silicon antifoaming agent, by weight, raw material comprises: 8 parts of hydroxyl silicone oil, 35 parts of polymethicone, 2 parts of thickener, 80 parts of water, 7 parts of emulsifying dispersant, 3 parts of white carbon Black, 45 parts modified polyether.

[0040] The polymethylsiloxane is a combination of polydimethylsiloxane and poly(methoxy)vinylsiloxane, the weight ratio is 1:0.3, and the polydimethylsiloxane is purchased from Shandong Longhui Chemical Co., Ltd., the brand is #201-100. The thickener is sodium alginate. The emulsifying dispersant is Tween-20. The hydroxy silicone oil was purchased from Jinan Ruiyuan Chemical Co., Ltd., model 203.

[0041] The raw materials for the preparation of the modified polyether include ethylene oxide derivatives, propylene oxide, allyl chloride, and alcohol ether monomers, and the weight ratio of the ethylene oxide derivatives, propylene oxide, and allyl chloride is 1 :6:0.1. The alcohol ether monomer...

Embodiment 2

[0045] A kind of silicone antifoaming agent, by weight, the raw material comprises: 5 parts of hydroxyl silicone oil, 20 parts of polymethylsiloxane, 1 part of thickener, 50 parts of water, 6 parts of emulsifying dispersant, 1 part of white carbon Black, 30 parts modified polyether.

[0046] The polymethylsiloxane is a combination of polydimethylsiloxane and poly(methoxy)vinylsiloxane, the weight ratio is 1:0.1, and the polydimethylsiloxane is purchased from Shandong Longhui Chemical Co., Ltd., the brand is #201-20. The thickener is sodium alginate. The emulsifying dispersant is Tween-20. The hydroxy silicone oil was purchased from Jinan Ruiyuan Chemical Co., Ltd., model 203.

[0047] The raw materials for the preparation of the modified polyether include ethylene oxide derivatives, propylene oxide, allyl chloride, and alcohol ether monomers, and the weight ratio of the ethylene oxide derivatives, propylene oxide, and allyl chloride is 1 :4:0.5. The alcohol ether monomer ...

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PUM

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Abstract

The invention relates to the field of preparation of defoamers, and specifically provides a silicone defoamer. In parts by weight, the raw materials at least include: 5-10 parts of hydroxyl silicone oil, 20-50 parts of polymethylsiloxane, 1 ‑3 parts of thickener, 50‑100 parts of water, 6‑8 parts of emulsifying dispersant, 1‑5 parts of white carbon black, 30‑60 parts of modified polyether. Also provided is a preparation method of the silicone defoamer.

Description

technical field [0001] The invention relates to the field of defoamers, in particular to a silicone defoamer. Background technique [0002] Defoamers are surfactants used to suppress and eliminate various harmful foams. They are the most effective method to control foams and are widely used in chemical, pharmaceutical, textile, printing and dyeing, mineral processing, paint and sewage treatment and other fields. Foam in industrial production will bring harm such as reduced production capacity, waste of raw materials, and reduced quality, which will adversely affect production. There are many types of defoamers on the market, with different performances. If only from the type of defoaming substances, the more common ones are: mineral oil defoamers, polyether defoamers and silicone polyether modified defoamers, etc. . However, the existing polyether-modified silicone defoamers have the following defects: it is difficult to balance the interaction between stable compatibility...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D19/04
CPCB01D19/0409
Inventor 朱淮军陈维洪邓晓珊黄雪萍
Owner 广东省科学院产业技术育成中心
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