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Solid particulate mineral oil defoaming agent and preparation method thereof

A technology of solid particles and mineral oil, applied in the field of defoamer, can solve the problems of edge shrinkage, coating shrinkage, poor product stability, etc., and achieve good repeatability and controllability, simple process operation, and huge economic benefits. Effect

Inactive Publication Date: 2019-04-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN102120108A introduces a mineral oil defoamer with polyether and white carbon black as the main defoaming substances, but white carbon black is directly added, and there is a defect of poor product stability
CN101310814A has introduced a kind of mineral oil defoamer, has added silicone grease to improve defoaming and suppressing performance, but can produce coating shrinkage cavity, edge shrinkage problem in water-based system

Method used

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  • Solid particulate mineral oil defoaming agent and preparation method thereof
  • Solid particulate mineral oil defoaming agent and preparation method thereof
  • Solid particulate mineral oil defoaming agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] This example provides a solid particulate mineral oil defoamer 1 and its preparation method.

[0051] Described solid particle mineral oil defoamer is made up of following raw material by mass percent: industrial No. 5 white oil 87%, alkyl modified silicone oil (the number of carbon atoms in the group R is 8, m=70, n=560) 10%, hydrophobic fumed silica 1%, polyether (PPG5000) 1% and emulsifier (composed of Span80:Tween80 at a mass ratio of 5:1) 1%.

[0052] The preparation method is as follows:

[0053](1) Take 10 g of alkyl-modified silicone oil and 1 g of silazane-modified hydrophobic fumed silica at a stirring speed of 300 rpm, a temperature of 100° C., and a reaction time of 0.5 h to prepare a silicone paste.

[0054] (2) Add 87.0g industrial No. 5 white oil, 11.0g silicone paste, 1.0g PPG5000 and 1.0g emulsifier into the container, and react for 0.5h at a temperature of 60°C to obtain a mixture; After high-speed dispersion for 0.5 h, the solid particle mineral oil...

Embodiment 2

[0056] This embodiment provides a solid particulate mineral oil defoamer 2 and its preparation method.

[0057] Described solid particle mineral oil defoamer is made up of following raw material by mass percent: liquid paraffin 64%, alkyl modified silicone oil (the number of carbon atoms in the group R is 8, m=60, n=600 ) 23.5%, hydrophobic fumed silica 1.5%, polyether (PPG5000) 5% and emulsifier (compounded by Span80:Tween80 according to the mass ratio of 5:1) 6%.

[0058] (1) Take 24g of alkyl-modified silicone oil and 1g of silicone oil-modified hydrophobic fumed silica at a stirring speed of 300rpm, a reaction temperature of 110°C, and a reaction time of 1h to prepare a silicone paste.

[0059] (2) Add 64.0g of liquid paraffin, 25.0g of silicone paste, 5.0g of PPG5000 and 6.0g of emulsifier into the container, and react for 1.0h at a temperature of 80°C to obtain a mixture; h, obtaining the described solid particle mineral oil defoamer.

Embodiment 3

[0061] This embodiment provides a solid particulate mineral oil defoamer 3 and its preparation method.

[0062] Described solid particulate matter mineral oil defoamer is made up of following raw material by mass percent: industrial No. 32 white oil 86%, alkyl modified silicone oil (the number of carbon atoms in the group R is 12, m=70, n=560) 10%, hydrophobic fumed silica 1%, polyether (PPG5000) 0.5%, and emulsifier (composed of Span80:Tween80 in a mass ratio of 5:1) 2.5%.

[0063] (1) Take 10g of alkyl-modified silicone oil (the number of carbon atoms in the group R is 12) and 1g of silicone oil-modified hydrophobic fumed silica at a stirring speed of 300rpm and a temperature of 120°C. 2h, the silicone paste was prepared.

[0064] (2) Add 86.0g industrial No. 32 white oil, 11.0g silicone paste, 0.5g PPG5000 and 2.5g emulsifier into the container, and react for 0.5h at a temperature of 60°C to obtain a mixture; Disperse for 0.5h to obtain the solid particle mineral oil defo...

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Abstract

The invention belongs to the technical field of defoaming agents, and concretely relates to a solid particulate mineral oil defoaming agent and a preparation method thereof. The mineral oil defoamingagent comprises, by mass, 64-87% of mineral oil, 10-24% of alkyl modified silicone oil, 0.5-1.5% of hydrophobic fumed silica, 0.5-5% of polyether and 1-6% of an emulsifier, wherein the alkyl modifiedsilicone oil with a good solubility in mineral oil is selected, and can be mixed with the silicone oil modified hydrophobic fumed silica at a high temperature to form a silicon paste in order to significantly improve the defoaming performance and stability of the defoaming agent. The preparation method has the advantages of no addition of an organic solvent, simplicity, and good repeatability andcontrollability. The particle size of the added hydrophobic silica and the type and the proportion of the emulsifier are adjusted, so the obtained defoaming agent has the advantages of short defoamingtime, long foam inhibition time, no shrinkage phenomenon of a film, and good application prospect in the fields of coatings, inks and papermaking.

Description

technical field [0001] The invention belongs to the technical field of defoamers, and in particular relates to a solid particle mineral oil defoamer and a preparation method thereof. Background technique [0002] In the industrial production process of pulping and papermaking, textile printing and dyeing, sewage treatment, biological fermentation, petroleum exploration and refining, construction industry, adhesives, etc., a large amount of active substances are used. During the mixing operation of materials, along with The entry of air will generate a lot of foam; in addition, a large amount of foam will also be generated during the high-speed mixing process of materials. The existence of these foams will lead to problems such as reduced production capacity, waste of raw materials, prolonged reaction cycle, and reduced product quality. [0003] The elimination of foam in industrial processes must be done by adding corresponding defoamers. The defoaming mechanism of traditi...

Claims

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Application Information

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IPC IPC(8): B01D19/04
CPCB01D19/0404B01D19/0409
Inventor 潘朝群祝立强
Owner SOUTH CHINA UNIV OF TECH
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