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A kind of organosilicon defoamer and preparation method thereof

A silicone defoamer and dispersant technology, applied in the field of defoamer, can solve the problems of layering, affecting product quality, demulsification, etc., achieving excellent water dispersibility, improving centrifugal stability, and improving defoaming performance. Effect

Active Publication Date: 2022-04-12
JINHU JINLING NEW MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since the emulsion is a metastable system, phenomena such as demulsification and delamination often occur during transportation and use, which seriously affect product quality. Therefore, how to improve the emulsion stability of defoamers has always been Technical problems to be solved by manufacturers

Method used

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  • A kind of organosilicon defoamer and preparation method thereof
  • A kind of organosilicon defoamer and preparation method thereof
  • A kind of organosilicon defoamer and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] A silicone defoamer provided in this example comprises the following components in parts by mass: 20 parts of polyether-modified polydimethylsiloxane, 12 parts of polyether, 5 parts of composite emulsifier, dispersion 1.5 parts of food additives, 0.1 parts of food additives, 1.5 parts of stabilizers;

[0042] Wherein, the composite emulsifier is a mixture of Tween-60 and Span-80, wherein the content of Span-80 is 65%, and the content of Tween-60 is 35%;

[0043] The dispersant is non-ionic polyoxyethylene surfactant; the food additive is tert-butyl hydroquinone; the stabilizer is sodium carboxymethyl cellulose.

[0044] The preparation method comprises the following steps:

[0045] (1) To prepare allyl polyether, mix the catalyst potassium hydroxide with allyl alcohol, the mass ratio of potassium hydroxide to allyl alcohol is 1:9, add propylene oxide, and react in vacuum at 120°C. After the reaction is complete, Add ethylene oxide, react in vacuum at 120°C, cool and d...

Embodiment 2

[0056] A silicone defoamer provided in this example comprises the following components in parts by mass: polyether-modified polydimethylsiloxane, 12 parts of polyether, 5 parts of composite emulsifier, 1.5 parts of dispersant 0.1 part of food additive, 1.5 part of stabilizer;

[0057] Wherein, the composite emulsifier is a mixture of Tween-60 and Span-80, wherein the content of Span-80 is 65%, and the content of Tween-60 is 35%;

[0058] The dispersant is non-ionic polyoxyethylene surfactant; the food additive is tert-butyl hydroquinone; the stabilizer is sodium carboxymethyl cellulose.

[0059] The preparation method comprises the following steps:

[0060] (1) To prepare allyl polyether, mix the catalyst potassium hydroxide with allyl alcohol, the mass ratio of potassium hydroxide to allyl alcohol is 1:9, add propylene oxide, and react in a vacuum at 120°C. After the reaction is complete, Add ethylene oxide, wherein the molar ratio of ethylene oxide to propylene oxide is 1:...

Embodiment 3

[0070] A silicone defoamer provided in this example comprises the following components in parts by mass: 20 parts of polyether-modified polydimethylsiloxane, 12 parts of polyether, 5 parts of composite emulsifier, dispersion 1.5 parts of food additives, 0.1 parts of food additives, 1.5 parts of stabilizers;

[0071] Wherein, compound emulsifier is the mixture of Tween-60 and Span-80;

[0072] The dispersant is non-ionic polyoxyethylene surfactant; the food additive is tert-butyl hydroquinone; the stabilizer is sodium carboxymethyl cellulose.

[0073] The preparation method comprises the following steps:

[0074] (1) To prepare allyl polyether, mix the catalyst potassium hydroxide with allyl alcohol, the mass ratio of potassium hydroxide to allyl alcohol is 1:9, add propylene oxide, and react in a vacuum at 120°C. After the reaction is complete, Add ethylene oxide, wherein the molar ratio of ethylene oxide to propylene oxide is 1:4, react in a vacuum at 120°C, cool and discha...

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Abstract

The invention discloses a silicone defoamer and a preparation method thereof, which comprises the following components in parts by mass: 15-20 parts of polyether-modified polydimethylsiloxane, 10-15 parts of polyether, Composite emulsifier 3-7 parts, dispersant 0.5-2 parts, food additive 0-0.1 parts, stabilizer 1-1.5 parts. Compared with commercially available defoamers, the silicone defoamer prepared by the present invention has little difference in defoaming performance and foam suppression performance, but the centrifugal demulsification time of the silicone defoamer prepared by the present invention is longer and the stability is higher. The commercially available defoamer is greatly improved, and the water dispersibility is better than that of the commercially available defoamer, and the performance is more balanced.

Description

technical field [0001] The invention belongs to the technical field of defoamers, and in particular relates to a silicone defoamer and a preparation method thereof. Background technique [0002] Foam is a thermodynamically unstable system, which cannot be stable. The thermodynamic instability of foam is due to the fact that the total surface area of ​​the liquid in the system is greatly reduced after the foam is broken, so that the energy (free energy) of the system is greatly reduced. Defoamers, also known as defoamers or defoamers, will produce many foams that affect production during industrial production, and defoamers need to be added. It is widely used to remove harmful foam produced in the production process of latex, textile sizing, food fermentation, biomedicine, paint, petrochemical, papermaking, industrial cleaning, sewage treatment and other industries. [0003] However, since the emulsion is a metastable system, phenomena such as demulsification and delaminatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D19/04
CPCB01D19/0409B01D19/0404B01D19/0436B01D19/0495
Inventor 凌坤华张进范阳海凌功明
Owner JINHU JINLING NEW MATERIAL SCI & TECH
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