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High-efficiency antifoaming agent

A defoamer and high-efficiency technology, applied in the field of fine chemical preparations, can solve the problem of single compounding technology, the inability of the defoamer to exert the high temperature resistance, acid and alkali resistance of polyether modified polysiloxane, and the defoamer elimination and inhibition. Poor foam performance, etc.

Inactive Publication Date: 2013-03-06
TIANJIN SCIPHARMACN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the polyether-modified polysiloxane defoamer compounding technology of domestic manufacturers is single. The proportion of organic silicon components is small, so the defoamer prepared in this way cannot exert the excellent properties of polyether-modified polysiloxane such as high temperature resistance and acid and alkali resistance, and the defoamer has poor defoaming and foam suppression performance, which is different from foreign The gap between the products is obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 20Kg of 500cst simethicone oil, 20Kg of 1000cst simethicone oil, 5Kg of methyl fluorosilicone oil, and 3Kg of hydrophobic white carbon black into the reaction kettle, keep it warm at 200°C for 8 hours, and grind the obtained product through a colloid mill; mix 40Kg of the above product with poly Mix 17Kg of ether-modified polysiloxane emulsifier thoroughly. At 70°C, add water to the oil to undergo phase inversion. When adding water, keep the emulsification temperature constant. After adding water, cool to room temperature and pass through a colloid mill before adding thickener. Aqueous solution Dilute this product to 20% emulsion.

Embodiment 2

[0026] Add 20Kg of 500cst simethicone oil, 20Kg of 1000cst simethicone oil, 5Kg of vinyl fluorosilicone oil, and 3Kg of hydrophobic white carbon black into the reaction kettle. Mix 17Kg of ether-modified polysiloxane emulsifier thoroughly. At 70°C, add water to the oil to undergo phase inversion. When adding water, keep the emulsification temperature constant. After adding water, cool to room temperature and pass through a colloid mill before adding thickener. Aqueous solution Dilute this product to 20% emulsion.

Embodiment 3

[0028] Add 20Kg of 500cst simethicone oil, 20Kg of 1000cst simethicone oil, 10Kg of methyl fluorosilicone oil, and 4Kg of hydrophobic white carbon black into the reaction kettle, keep it warm at 200°C for 8 hours, and grind the obtained product through a colloid mill; mix 50Kg of the above product with poly Mix 15Kg of ether-modified polysiloxane emulsifier thoroughly. At 70°C, add water to the oil for phase inversion. Keep the emulsification temperature constant when adding water. After adding water, cool to room temperature and pass through a colloid mill before adding thickener. Aqueous solution Dilute this product to 20% emulsion.

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Abstract

The invention relates to a high-efficiency antifoaming agent which comprises the following raw materials based on parts by weight: 10-45 parts of simethicone, 2-10 parts of fluorosilicone oil, 0.5-3 parts of hydrophobic white carbon black, 5-25 parts of polyether-modified polysiloxane emulgator, 100-200 parts of deionized water and 0.5-1 part of thickening agent. The antifoaming agent takes composition of the simethicone and the fluorosilicone oil as a main antifoaming active ingredient; and after the fluorosilicone oil is added, the surface tension of an antifoaming agent system can be reduced, and the antifoaming and foam-inhibiting performances can be improved. According to the polyether-modified polysiloxane emulgator, not only can the antifoaming active ingredients be emulsified, but also the effect enhancing action can be achieved due to the fact that the high-efficiency antifoaming agent further has good antifoaming ingredients. The antifoaming agent is high in antifoaming capacity, long in foam-inhibiting time, wide in application range, capable of being applied to various foam systems, and suitable for antifoaming and foam-inhibiting under severe conditions, i.e. high acid-base, high temperature and the like.

Description

technical field [0001] The invention relates to a high-efficiency defoamer and a preparation method thereof. Specifically relates to a method for preparing a high-efficiency defoamer by using dimethyl silicone oil, fluorosilicone oil, hydrophobic white carbon black and polyether modified polysiloxane emulsifier as main raw materials. It belongs to the technical field of fine chemical preparations. Background technique [0002] In many industrial productions, a large number of foams will be produced. These foams seriously affect the industrial production process, reduce production efficiency, affect product quality, and even cause production to fail. To overcome the adverse effects of these foams on industrial production, it is necessary to try to eliminate foam and suppress For the generation of foam, adding defoamer is a simple and economical defoaming method. [0003] At present, the common types of defoamers are: polyether type, silicone type, non-silicon type and silic...

Claims

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Application Information

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IPC IPC(8): B01D19/04
Inventor 李军伟刘志锋田东奎
Owner TIANJIN SCIPHARMACN
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