Defoaming agent composition as well as preparation method and application thereof

A technology of composition and defoaming agent, applied in the directions of separation method, chemical instrument and method, foam dispersion/prevention, etc., can solve the problems of poor performance of defoaming agent, inability to lasting foam suppression, etc., to improve rapid defoaming performance, improve acid and alkali resistance, and improve the effect of dispersing speed

Active Publication Date: 2020-10-13
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polysiloxane actives developed in the early stage are obtained by processing polydimethylsiloxane and silicon dioxide through specific processing techniques, such as the defoamer composition introduced in patent application US4639489, but it cannot sustain foam suppression
At present, the main improvement directions of silicone defoamer actives mainly include: (1) replacing methyl polysiloxane with modified polysiloxane; (2) replacing linear polysiloxane with spatial network structure (3) introducing silicone resin etc. into polysiloxane and silicon oxide particles; (4) introducing polyether or polyether modified siloxane etc. into the active matter, however, the existing defoamer Poor performance, needs further improvement

Method used

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  • Defoaming agent composition as well as preparation method and application thereof
  • Defoaming agent composition as well as preparation method and application thereof
  • Defoaming agent composition as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] 1. Preparation of linear silicone paste

[0066] (1) Accurately measure 40g of 350mPa·s simethicone oil, 45g of 500mPa·s simethicone oil into a 250mL four-neck bottle, start stirring and heat up to 50°C, add 10g in batches with a specific surface area of ​​200m 2 / g of fumed hydrophobic silica and MQ silicone resin (the link M unit is R 3 SiO 1 / 2 , linking Q cells to SiO 4 / 2 , the R group is a methyl group, M / Q=0.8) 5g, after adding, continue to stir and mix for 2h;

[0067] (2) The mixture obtained above was heated to 100° C., 50 microliters of potassium hydroxide isopropanol solution (potassium hydroxide content 15 wt%) was added, and the reaction was continued for 1.5 h;

[0068] (3) Raise the temperature of the material in the reaction bottle to 150° C., further heat treatment for 3 hours, and cool to room temperature to obtain a linear silicone paste.

[0069] 2. Preparation of 3D mesh silicone paste

[0070] (1) Accurately measure 80g of 200mPa·s terminal vin...

Embodiment 2

[0080] 1. Preparation of linear silicone paste

[0081] (1) Accurately measure 85g of 500mPa·s simethicone oil in a 250mL four-neck bottle, start stirring and heat up to 55°C, add 10g in batches with a specific surface area of ​​200m 2 / g gas-phase method hydrophobic silica and MQ silicone resin (the link M unit is R 3 SiO 1 / 2 , linking Q cells to SiO 4 / 2 , the R group is a methyl group, M / Q=0.8) 5g, after adding, continue to stir and mix for 2h;

[0082] (2) The mixture was heated to 100° C., 50 microliters of potassium hydroxide isopropanol solution (potassium hydroxide content 15 wt%) was added, and the reaction was continued for 1.5 h;

[0083] (3) Raise the temperature of the material in the reaction bottle to 150° C., further heat treatment for 3 hours, and cool to room temperature to obtain a linear silicone paste.

[0084] 2. Preparation of 3D mesh silicone paste

[0085] (1) Accurately measure 80g of 200mPa·s terminal vinyl silicone oil (vinyl content 1.9mol%), 5...

Embodiment 3

[0095] 1. Preparation of linear silicone paste

[0096] (1) Accurately measure 45g of 350mPa·s simethicone oil, 45g of 500mPa·s simethicone oil into a 250mL four-necked bottle, start stirring and heat up to 50°C, add 5g in batches with a specific surface area of ​​200m 2 / g gas-phase method hydrophobic silica and MQ silicone resin (the link M unit is R 3 SiO 1 / 2 , linking Q cells to SiO 4 / 2 , the R group is a methyl group, M / Q=0.8) 5g, after adding, continue to stir and mix for 2h;

[0097] (2) The mixture obtained above was heated to 110° C., 50 microliters of potassium hydroxide isopropanol solution (potassium hydroxide content 15 wt%) was added, and the reaction was continued for 1.5 h;

[0098] (3) Raise the temperature of the material in the reaction bottle to 150°C, further heat treatment for 3 hours, and cool to room temperature to obtain a linear silicone paste.

[0099] 2. Preparation of 3D mesh silicone paste

[0100] (1) Accurately measure 80g of 200mPa·s termi...

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Abstract

The invention relates to the technical field of fine chemical engineering, and particularly provides a defoaming agent composition which is prepared from raw materials including linear silicon paste,3D reticular structure silicon paste, polyether modified silicone oil, a surfactant, polyether, water and auxiliaries. According to the defoaming agent composition disclosed by the invention, polysiloxane and a polyether system are compounded, so that the excellent performance of the polysiloxane is reserved, the excellent performance of the polyether is introduced, and therefore, the acid and alkali resistance, shearing resistance, high temperature resistance and the like of the defoaming agent are improved, and the dispersion speed of the defoaming agent in an aqueous solution is increased.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a defoamer composition and its preparation method and application. Background technique [0002] In modern industrial production, foam is ubiquitous, for example, machine tanks for processing fluids, industrial cleaning pools, industrial and agricultural products and preparations, various production links of petrochemicals, and water treatment. Foam also brings various problems to industrial production. In order to prevent foam from overflowing, the feed factor is forced to be reduced by 30% to 50%. Foam overflow will lead to waste of raw materials, foam occupies space, affects the reaction speed, and the production cycle is forced to be extended. Foam will affect the quality of products, such as paint, the quality of plastic products. The generation of foam will affect the stability of industrial production, resulting in operational fluctuations and unstable quality. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04
CPCB01D19/0404B01D19/0409
Inventor 吴翠李遵陕刘继徐亚卿余声
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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