Defoaming agent composition

A technology of composition and defoamer, which is applied in the field of defoamer composition and defoamer composition introducing modified nano-silica, which can solve the problem of high viscosity, difficult dispersion and low defoaming efficiency of defoaming active substances and other problems, to achieve the effect of enhanced defoaming performance, large specific surface area, and strong hydrophilic performance

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1931417A discloses a high-temperature-resistant and strong-alkali-resistant defoamer composition, which is obtained by the crosslinking reaction of polysiloxane and organosilicon resin. After the active substance is prepared into an emulsion, the performance is tested by bubbling in black liquor. It has good antifoaming performance, but the defoaming speed needs to be further improved, and because the antifoaming active substance has a high viscosity, it is quite difficult to disperse it in water
[0005] It can be known from existing patent materials and commercially a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 10 parts of dodecyl alcohol-modified nano-silica (50-2000nm) were uniformly dispersed in 30 parts of hyperbranched polyether with a branching degree of 0.2 by ultrasonic waves, and polydimethylsiloxane with a molecular weight of 15000-20000 was added 30 parts of oxane, stirred and reacted at 120°C for 2 hours, added 30 parts of coker wax oil, 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

[0025] Disperse 15 parts of dodecanol-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 hydrogenated diesel oil, 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

[0027] Disperse 20 parts of dodecyl alcohol-modified nano-silica (50-2000nm) evenly in 25 parts of hyperbranched polyether with a branching degree of 0.6 by ultrasonic waves, 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 coker wax oil, 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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PUM

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Abstract

The invention relates to a defoaming agent composition which is prepared by compounding 20-30 parts by mass of branched polyether, 10-20 parts by mass of modified nano silica, 20-30 parts by mass of polyorganosiloxane and 20-30 parts by mass of a solvent. The defoaming agent composition combines the hyperbranched polyether and the modified nano silica together, has an obvious synergistic effect, so that the hyperbranched polyether and the modified nano silica can be more compatible, defoaming properties of the hyperbranched polyether and the modified nano silica in high temperature environment can be increased, when the adding amount is about 30 mug / g, the defoaming rate can reach more than 90%, and the defoaming performance is strong.

Description

technical field [0001] The invention relates to a defoamer composition and its application, in particular to a defoamer composition introduced with modified nano silicon dioxide, which belongs to the technical field of fine chemicals. 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 polym...

Claims

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Application Information

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IPC IPC(8): B01D19/04
Inventor 刘纾言王鑫孙鹏赵起超孙国权
Owner CHINA PETROLEUM & CHEM CORP
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