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Efficient silicone defoaming agent

A silicone defoamer, high-efficiency technology, applied in the direction of foam dispersion/prevention, can solve problems such as complex production process and difficult production realization, and achieve excellent performance and excellent dispersion effect

Inactive Publication Date: 2012-02-08
山东大易化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Looking at the components and production processes of these silicone defoamers, it may not be possible to obtain the desired defoaming and antifoaming effects, or the hydrophilic particles are used, and the silicone grease components must be subjected to complex processes to obtain the desired effect. The desired defoaming effect, resulting in a more complex production process, there are certain difficulties in production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1, a high-efficiency silicone defoamer is composed of 9 kilograms of hydrophobic white carbon black, 60 kilograms of 500 cst of simethicone oil, and 20 kilograms of 100,000 cst of simethicone oil. Heating the temperature to 150 ° C, the system always maintains a negative Pressed state to remove low molecular weight, stirred and heated at 160°C for 5 hours, cooled naturally to room temperature to obtain a silicone grease mixture, take 40 kg of the above silicone grease mixture, 12 kg of hydrophilic polyether silicone oil, 8 kg of lipophilic polyether Silicone oil, 2 kg of synergist lauryl dimethyl amine oxide, 2 kg of co-emulsifier AEO-3 are added to the reaction kettle, the temperature of the system is raised to 60 °C, and the components are stirred evenly, and then the stirring is increased. At the same time, slowly add hot water at 70°C into the reaction kettle. After the phase transition is completed, stop heating the water, and adjust the stirring to a modera...

Embodiment 2

[0034]Example 2, a high-efficiency silicone defoamer is 12 kg of hydrophobic silica, 45 kg of 700cst simethicone oil, 45 kg of 50000cst simethicone oil, heated to 130 ° C, and the system always maintains negative pressure state, to remove low molecular weight, stir and heat at 140°C for 3 hours, and cool naturally to room temperature to obtain a silicone grease mixture. Take 40 kg of the above silicone grease mixture, 10 kg of hydrophilic polyether silicone oil, and 6 kg of lipophilic polyether silicone oil , 3 kg of synergist dodecyl dimethyl amine oxide was added to the reaction kettle, 2 kg of AEO-3, the system was heated up to 60 ° C, stirred to make the components evenly mixed, and then increased stirring intensity, while 70 ° C hot water Slowly add to the reaction kettle, when the phase transition is completed, stop heating the water, and adjust the stirring force to a moderate level, add normal temperature water containing 1 kg of thickener to the emulsification kettle, ...

Embodiment 3

[0035] Example 3, a high-efficiency silicone defoamer is 12 kg of hydrophobic silica, 60 kg of 600cst simethicone oil, 40 kg of 80000cst simethicone oil, heated to 140 ° C, and the system always maintains negative pressure state, to remove low molecular weight, stir and heat at 160°C for 3 hours, and naturally cool to room temperature to obtain a silicone grease mixture. Take 40 kg of the above silicone grease mixture, 9 kg of hydrophilic polyether silicone oil, and 7 kg of lipophilic polyether silicone oil. , 2 kg of synergist tetradecyl dimethyl amine oxide was added to the reaction kettle, 1 kg of AEO-5, the system was heated up to 60 ° C, stirred to make the components evenly mixed, and then increased stirring intensity, while 70 ° C hot water Slowly add to the reaction kettle, when the phase transition is completed, stop heating the water, and adjust the stirring force to a moderate level, add normal temperature water containing 1 kg of thickener to the emulsification kett...

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Abstract

The invention discloses an efficient silicone defoaming agent, which mainly comprises a silicone grease mixture, a synergistic agent, a polyether silicone oil emulsifier, an assistant emulsifier, a thickening agent, preservative and water, wherein in an emulsifier emulsion, the silicone grease mixture and the polyether silicone oil emulsifier account for 70-90 percent of the amount of active matters; the active matters account for 5-30 percent of the amount of the emulsion; and water serves as another medium. In the efficient silicone defoaming agent, the foam inhibiting performance is enhanced by using the silicone grease mixture, the defoaming performance and dispersity are improved by using the polyether silicone oil emulsifier, and the silicone grease viscosity and compatibility are lowered and the emulsifying effect is improved by adding the synergistic agent. The efficient silicone defoaming agent has the characteristics of application to waterborne systems, high defoaming speed, good foam inhibiting effect, low using dosage, high chemical inertness, nontoxicity, capability of acting under severe conditions and low cost.

Description

technical field [0001] The invention belongs to the technical field of fine chemical products, and in particular relates to an organic silicon defoamer for water-based systems such as printing and dyeing, ink, and papermaking sewage. Background technique [0002] Many industrial production processes involve the generation of air bubbles, most of which will cause 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; Foaming agent is a surfactant used to suppress or eliminate foam, and it is the most economical and effective method to control foam; it has been used in textile printing and dyeing, medicine, fermentation, food, papermaking, mineral processing, coating, fiber and petroleum refining at home and abroad, etc. Defoaming technology is used in the field, but the current defoaming agent is relatively target...

Claims

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Application Information

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IPC IPC(8): B01D19/04
Inventor 孙会易王奎东孙景香孙大超
Owner 山东大易化工有限公司
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