Emulsion-type organosilicone defoamer and preparation method thereof

An organosilicon defoamer and emulsion type technology, applied in the field of emulsion type organosilicon defoamer and its preparation, can solve the problems of loss of defoaming activity, easy failure, poor foam suppression performance, etc. The effect of reducing production costs and reducing pollution

Active Publication Date: 2016-06-22
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, silicone emulsion defoamers also have shortcomings, such as poor foam suppression performance, and are prone to failure in continuous foaming systems such as papermaking, wastewater treatment, and sugar production; in the application process, they lose their defoaming activity due to disproportionation. At the same time, the separated silicone oil is also easy to adhere to the surface of the fabric and affect its appearance

Method used

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  • Emulsion-type organosilicone defoamer and preparation method thereof
  • Emulsion-type organosilicone defoamer and preparation method thereof
  • Emulsion-type organosilicone defoamer and preparation method thereof

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preparation example Construction

[0024] A kind of emulsion type organosilicon defoamer, its preparation method comprises the steps:

[0025] 1) Treatment of hydrophobic fumed silica: 100 parts by weight of hydrophobic fumed silica, 3-5 parts by weight of ammonium dihydrogen phosphate and 3-5 parts by weight of hydrophobic treatment agent were kept at 90-100°C for 1 hour, Get treated fumed silica;

[0026] 2) Preparation of silicone paste: Mix 2 parts by weight of treated fumed silica and 48 parts by weight of dimethyl silicone oil at 170-200°C for 2.5-3 hours to obtain silicone paste;

[0027] 3) Emulsification compounding: In a four-necked flask, 70-80 parts by weight of the silicone paste prepared in step 2), 20-30 parts by weight of fatty alcohol, 5-10 parts by weight of sodium phosphate, and 26-32 parts by weight of compound emulsification Mix the agent evenly at 75°C, then slowly add 200-300 parts by weight of water at 70°C until phase inversion, add 250-300 parts by weight of water after stirring for 2...

Embodiment 1

[0033] 1) Treatment of hydrophobic fumed silica: 100 parts by weight of hydrophobic fumed silica (with a specific surface area of ​​225m 2 / g), 3 parts by weight of ammonium dihydrogen phosphate and 3 parts by weight of 1-octanol were incubated at 95°C for 1 hour to obtain treated fumed silica;

[0034] 2) Preparation of silicone paste: 2 parts by weight of treated fumed silica and 48 parts by weight of dimethyl silicone oil (viscosity 1000mPa·s) were mixed at 180°C for 2.5 hours to obtain a silicone paste;

[0035] 3) Emulsion compounding: In a four-necked flask, mix 70 parts by weight of the silicone paste prepared in step 2), 30 parts by weight of 1-octanol, 5 parts by weight of sodium phosphate, 9.8 parts by weight of stearyl alcohol, 2.5 parts by weight of mono Glycerin, 9.8 parts by weight of Span-60, 7.4 parts by weight of Tween-60, and 2.5 parts by weight of isomeric alcohol polyoxyethylene ether were mixed uniformly at 75°C, and then slowly added 200 parts by weight o...

Embodiment 2

[0037] 1) Treatment of hydrophobic fumed silica: 100 parts by weight of hydrophobic fumed silica (with a specific surface area of ​​275m 2 / g), 4 parts by weight of ammonium dihydrogen phosphate and 4 parts by weight of hexamethyldisilazane were incubated at 100°C for 1 hour to obtain treated fumed silica;

[0038] 2) Preparation of silicone paste: 2 parts by weight of treated fumed silica and 48 parts by weight of dimethyl silicone oil (viscosity 800mPa·s) were mixed at 200°C for 2.5 hours to obtain a silicone paste;

[0039] 3) Emulsion compounding: In a four-necked flask, mix 75 parts by weight of the silicone paste prepared in step 2), 25 parts by weight of isooctyl alcohol, 10 parts by weight of sodium phosphate, 8 parts by weight of stearyl alcohol, and 2 parts by weight of monoglycerin Grease, 8 parts by weight of Span-60, 6 parts by weight of Tween-60, and 2 parts by weight of isomeric alcohol polyoxyethylene ether are mixed uniformly at 75 ° C, and then slowly add 300...

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Abstract

The invention discloses an emulsion-type organosilicone defoamer and a preparation method thereof. The preparation method includes: at 90-100 DEG C, using a hydrophobic treatment agent and ammonium dihydrogen phosphate to pre-treat hydrophobic gas-phase white carbon black; bending obtained gas-phase white carbon black with dimethicone at 170-200 DEG C to obtain silicone cream; under action of a compound emulsifier, compounding the silicone cream, fatty alcohol and sodium phosphate to obtain the emulsion-type organosilicone defoamer. The defect that existing emulsion-type organosilicone defoamers are prone to inactivation and poor in foam inhibiting performance is overcome, the organosilicone defoamer obtained has excellent alkali resistance and good continuous application performance, and is high in defoaming speed, foam inhibiting performance and emulsion stability and long in defoaming activity time, and the preparation process is clean and environment-friendly, free of emission of 'three wastes' and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to an emulsion-type organic silicon defoamer and a preparation method thereof. Background technique [0002] In industrial projects such as dyeing and weaving, food fermentation, pharmaceutical industry, petrochemical industry, papermaking, wastewater treatment, etc., harmful foam is easy to be produced, which not only affects production efficiency, causes waste of raw materials, but also reduces product quality. Therefore, it is necessary to add a defoamer to eliminate harmful foam in industrial production. [0003] In the development of defoamers, silicone emulsion defoamers are widely used in detergents due to their small surface tension, good thermal and chemical stability, physiological and reactive inertness, and high defoaming activity. , papermaking, sugar refining, electroplating, fertilizer, wastewater treatment and other industries. However, silico...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04
CPCB01D19/0409
Inventor 侯琳熙赵鑫钰易思利江献财卢振
Owner FUZHOU UNIV
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