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Defoaming composition

A composition and defoaming technology, applied in the direction of liquid degassing, foam dispersion/prevention, chemical instruments and methods, etc., can solve the problems that the removal of internal bubbles cannot meet the production requirements

Active Publication Date: 2019-01-22
南京瑞思化学技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, these products focus on eliminating the bubbles that have formed on the liquid surface, rather than on removing the bubbles inside the viscous system. Therefore, under the condition of strong shear force and high viscosity of the system, the ability to remove internal bubbles Far from meeting the requirements of production

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0046] Add 84 parts of 26# white oil, 5 parts of hydrophobic white carbon black (specific surface area 200m2 / g, chlorosilane hydrophobic treatment, hydrophobic value M= 70%) and 5 parts of lauryl polyoxyethylene (10) ether, keep the temperature at 80 ° C, stir at 1000 rpm for 4 hours, and turn on the emulsification circulation pump while stirring Circulation, so that the particle size distribution of hydrophobic particles in the carrier oil reaches 900nm; then add 1 part of SS-2, keep the above speed, and further stir and circulate for 1h; the temperature drops to 50 ° C, turn off the circulation pump, reduce the speed to 300rpm, add 5 Parts of isooctyl alcohol polyoxyethylene (8) ether, stirred for 10 minutes, the patented defoaming composition DA1 was obtained.

Embodiment 2

[0048] Add 75.5 parts of alkylbenzene, 9 parts of hydrophobic white carbon black (specific surface area 100m 2 / g, simethicone hydrophobic treatment, hydrophobic value M= 60%) and 9 parts of NP-10, keep the temperature at 140°C, stir at 2800rpm for 0.5h, while stirring, turn on the emulsification circulation pump to circulate, so that the hydrophobic The particle size distribution of the particles in the carrier oil reaches 600nm; then add 4.5 parts of SS-1, keep the above speed, further stir and circulate for 0.6h; the temperature drops to 60°C, turn off the circulation pump, reduce the speed to 500rpm, add 2 parts of octyl Phenol polyoxyethylene (10) ether, stirred for 30 minutes to obtain the patented defoaming composition DA2.

Embodiment 3

[0050] Add 89.8 parts of naphthenic oil, 1.5 parts of hydrophobic white carbon black (specific surface area 380m 2 / g, silazane hydrophobic treatment, hydrophobic value M= 65%) and 2.5 parts of D4425 (provided by AkzoNobel) and 3 parts of wetting agent Silwet-4, keep the temperature at 100 ° C, stir at 2500 rpm for 2.5 hours, While stirring, turn on the circulation of the emulsification circulation pump, so that the particle size distribution of the hydrophobic particles in the carrier oil reaches 800nm; then add 0.2 parts of SS-3, keep the above speed, and further stir and circulate for 2 hours; the temperature drops to 40 ° C, close the circulation Pump, reduce the rotation speed to 800rpm, add 3 parts of oleic acid polyoxyethylene (10) polyoxypropylene (2) ether, stir for 20 minutes, and obtain the patented defoaming composition DA3.

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Abstract

The invention relates to preparation of a defoaming composition. The defoaming composition is prepared from carrier oil, hydrophobic particles, a humectant, an organosilicone synergist and an emulsifier. The defoaming composition prepared by the preparation has relatively good defoaming capability in a high-viscosity system.

Description

technical field [0001] The invention relates to a defoaming composition, more precisely, the invention relates to a composition capable of removing bubbles in a viscous system and a preparation method thereof, belonging to the technical field of fine chemicals. Background technique [0002] Bubbles or foams are common phenomena in industrial production processes, and people often use defoamers to eliminate them. At present, defoamer is an indispensable fine chemical additive in industrial production process. [0003] Defoamers are classified according to active substances and are mainly divided into silicone defoamers and non-organosilicon defoamers. Silicone defoamer is mainly composed of polysiloxane, white carbon black, emulsifier and water. It is characterized by fast defoaming speed, but the disadvantage is that it has poor compatibility with foaming system and is easy to form silicon when used in coatings. spot, shrinkage cavity and other defects; non-organic silic...

Claims

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Application Information

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IPC IPC(8): B01D19/04
CPCB01D19/0404B01D19/0409
Inventor 不公告发明人
Owner 南京瑞思化学技术有限公司
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