Preparation method of high-viscosity organic silicon defoamer

A silicone defoamer, high-viscosity technology, applied in the direction of foam dispersion/prevention, etc., can solve the problems of poor foam suppression effect, poor defoaming durability, etc., and achieve excellent defoaming and suppressing performance, lasting The effect of foam regeneration

Inactive Publication Date: 2014-10-01
道尔达(西安)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the silicone defoamers produced by defoamer manufacturers are basically defoamers made of low-viscosity dimethyl silicone oil. Poor, the foam suppression effect is not good, they are all low-end products

Method used

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  • Preparation method of high-viscosity organic silicon defoamer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) According to the number of parts by mass, take 8 parts of simethicone oil of 2000cst, 7 parts of simethicone oil of 1 million cst, and 3 parts of specific surface area of ​​300m 2 / g of hydrophobic fumed silica, 1 part of vinyl trichlorosilane, 12 parts of polyether modified silicone oil, 2 parts of MQ type silicone resin, 3 parts of sorbitan trioleate, 2 parts of polyoxyethylene Sorbitan laurate, 0.2 part of sodium alginate, 0.2 part of mass concentration are 10% sodium hydroxide solution and 65 parts of water; wherein, the n(M) / n(Q) of MQ type silicone resin The ratio is 0.1;

[0025] 2) Add 2000 cst of simethicone oil, 1 million cst of simethicone oil, hydrophobic fumed silica, vinyl trichlorosilane and MQ type silicone resin into a heating tank and raise the temperature to 180 ° C, keep stirring for 3 hours to obtain Silicone paste: Stir and mix the silicone paste, polyether modified silicone oil, sorbitan trioleate and polyoxyethylene sorbitan laurate at 78°C t...

Embodiment 2

[0029] 1) According to the number of parts by mass, take 12 parts of 5000cst simethicone oil, 10 parts of 1 million cst simethicone oil, 1.0 parts of sodium hydroxide, 7 parts of aluminum stearate, 5 parts of polyether modified silicone oil, 2.5 parts MQ type silicone resin, 6.24 parts of sorbitan monostearate, 2.76 parts of cetearyl ether-21, 0.6 part of xanthan gum, 0.9 parts of mass concentration are 10% sodium hydroxide solution and 53 parts of water; Wherein, the ratio of n(M) / n(Q) of MQ type silicone resin is 0.8;

[0030] 2) Add 5000cst simethicone oil, 1 million cst simethicone oil, aluminum stearate, sodium hydroxide and MQ type silicone resin into a heating tank and heat up to 240°C, heat and stir for 1 hour to obtain a silicone paste; Ointment, polyether modified silicone oil, sorbitan monostearate, cetearyl ether-21 were stirred and mixed evenly at 75°C to obtain an oil phase mixture;

[0031] 3) Dissolve xanthan gum in 1 / 2 mass water at 50°C, then add sodium hydr...

Embodiment 3

[0034] 1) According to the number of parts by mass, take 8 parts of 5000cst simethicone oil, 15 parts of 1 million cst simethicone oil, 10 parts of stearic acid amide, 0.1 part of sodium hydroxide, 10 parts of polyether modified silicone oil, 2.01 parts MQ type silicone resin, 4.06 parts of polyoxyethylene sorbitan laurate, 1.94 parts of sodium stearate, 0.6 parts of carboxymethyl cellulose, 0.2 parts of mass concentration are 10% sodium hydroxide solution and 50.1 parts The water; Wherein, the ratio of n(M) / n(Q) of MQ type silicone resin is 0.8;

[0035] 2) Add 5000cst simethicone oil, 1 million cst simethicone oil, stearic acid amide, sodium hydroxide and MQ type silicone resin into a heating tank and heat up to 200°C, heat and stir for 2 hours to obtain a silicone paste; Ointment, polyether modified silicone oil, polyoxyethylene sorbitan laurate, and sodium stearate were stirred and mixed evenly at 72°C to obtain an oil phase mixture;

[0036]3) Dissolve carboxymethyl cell...

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Abstract

The invention discloses a preparation method of a high-viscosity organic silicon defoamer. The preparation method comprises the following steps of preparing a silicon grease by using organopolysiloxane, dewatering particles, catalysts and silicon resin under 180-240 DEG C, and stirring and uniformly mixing the silicon grease, polyether modified silicone oil and an emulsifying agent under 72-78 DEG C so as to obtain an oil phase mixture, dissolving a dispersing thickening agent in water; then adding a sodium hydroxide solution to uniformly stir to obtain emulsifying thickening water, adding the emulsifying thickening water into an oil-phase mixture, and carrying out emulsifying stir on the oil-phase mixture under 72-78 DEG C to obtain a coarse emulsifying object; and homogenizing the coarse emulsifying object under 50-55 DEG C to obtain a fine emulsifying object, adding residue water into the fine emulsifying object, stirring and uniformly mixing the fine emulsifying object under room temperature so as to obtain the high-viscosity organic silicon defoamer. The preparation method provided by the invention has the advantages that high-viscosity simethicone is utilized as an emulsifying main raw material, and thus, the obtained high-viscosity organic silicon defoamer has an ultra-strong defoaming speed and an anti-foam effect.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a preparation method of a high-viscosity organosilicon defoamer. Background technique [0002] In the production process of polyvinyl chloride polymerization, papermaking, biological fermentation, glass fiber, synthetic fiber, soybean protein, etc., a large amount of foam will be generated, which affects both production efficiency and product quality. Therefore, defoamers need to be added in these processes, and the more important type of defoamers - silicone defoamers, which have fast defoaming speed, wide application range, and no biological toxicity, so silicone defoamers The application of agents is becoming more and more important. The performance of the silicone defoamer is related to the molecular weight of the simethicone used. The higher the molecular weight, that is, the greater the viscosity of simethicone, the better the durability of the defoamer. At pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04
Inventor 杜伟锋马玉慧公会良
Owner 道尔达(西安)新材料有限公司
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