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Defoamer composition

A technology of composition and defoamer, which is applied in the direction of foam dispersion/prevention, chemical instruments and methods, liquid degassing, etc., can solve the problems of low defoaming efficiency, large amount of addition, poor persistence, etc., and achieve enhanced defoaming performance , large specific surface area, and strong hydrophilic properties

Inactive Publication Date: 2018-03-06
SICHUAN KELIXIN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among them, most of the silica defoamers only use the foam-breaking properties of silica, that is, silica only plays a physical role in its composition. Since there is no active center on the surface of pure silica, it can only rely on Its own performance is far from meeting the requirements, which will cause the defoamer system to be unstable, so there are problems such as low defoaming efficiency, large dosage, poor durability, and the need to continuously replenish defoamers during use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Disperse 15 parts of dodecyl alcohol-modified nano-silica (50-2000nm) uniformly with ultrasonic waves in 30 parts of hyperbranched polyether with a branching degree of 0.2, and add polydimethylsilane with a molecular weight of 15000-20000 30 parts of oxane, stirred and reacted at 120°C for 2 hours, added 20 parts of fuel oil, 10 parts of starch, and continued to stir for 1 hour. Naturally lowered to room temperature to obtain the finished product. The number average molecular weight of the hyperbranched polyether is 15,000.

Embodiment 2

[0023] Disperse 20 parts of dodecyl alcohol-modified nano-silica (50-2000nm) evenly in 40 parts of hyperbranched polyether with a branching degree of 0.4 by ultrasonic waves, and add polydimethylsilane with a molecular weight of 30000-40000 25 parts of oxane, stirred and reacted at 120°C for 2 hours, added 20 parts of fuel oil, 15 parts of starch, and continued to stir for 1 hour. Naturally lowered to room temperature to obtain the finished product. The number average molecular weight of the hyperbranched polyether is 25,000.

Embodiment 3

[0025] Disperse 25 parts of dodecyl alcohol-modified nano-silica (50-2000nm) evenly in 25 parts of hyperbranched polyether with a branching degree of 0.6, and add polydimethylsilane with a molecular weight of 50000-60000 35 parts of oxane, stirred and reacted at 120°C for 2 hours, added 20 parts of fuel oil, 20 parts of starch, and continued to stir for 1 hour. Naturally lowered to room temperature to obtain the finished product. The number average molecular weight of the hyperbranched polyether is 30000.

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Abstract

The invention discloses a defoamer composition, which comprises, in parts by weight: 20-30 parts of hyperbranched polyether; 15-25 parts of modified nano silicon dioxide; 20-30 parts of polyorganosiloxane; stabilizer 10-20 parts; 20-30 parts of fuel oil; the defoamer composition has high defoaming efficiency, stable performance, long service life, and has characteristics such as very fast defoaming speed and good foam suppression performance in various systems The defoamer synthesized by modified nano / micro silica can be widely used to eliminate harmful foam in industrial production.

Description

technical field [0001] The invention relates to the technical field of chemical auxiliary agents, in particular to a defoamer composition. Background technique [0002] Bubbles are a common phenomenon in life and work. However, in industrial production, sometimes foam can cause great harm, such as reducing the working efficiency of machines, delaying working hours, and affecting product quality. The methods of eliminating harmful foam mainly include physical methods and chemical methods, among which, the use of defoamers to defoam is one of the chemical defoaming methods. With the substantial increase in the production scale and production efficiency of industrial enterprises, the use of defoamers for defoaming has been more widely used. At present, defoamers have been widely used in papermaking, textile printing and dyeing, oil exploration and refining, coatings, emulsion polymerization, sewage treatment, metal cleaning and other industries, and defoamers have become indi...

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 李鹏
Owner SICHUAN KELIXIN NEW MATERIALS CO LTD
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