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Preparation for general defoaming agent and its application

A defoamer and defoaming technology, applied in the directions of foam dispersion/prevention, dissolution, chemical instruments and methods, etc., can solve the problem of affecting product quality, affecting phosphating and spraying processes, and the defoaming and suppressing performance of non-organic silicon defoamer problems, etc.

Inactive Publication Date: 2007-10-17
JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some manufacturers use silicone defoamers, and some manufacturers use non-organosilicon defoamers. Silicone defoamers are easy to break in this environment, forming "silicon spots" on the steel plate, affecting phosphorus Chemical and spraying process, which will affect the quality of the product
In comparison, the use of non-organic silicon defoamers is more popular, but the anti-foaming performance of ordinary non-organic silicon defoaming agents is not good, and a non-organic silicon defoaming agent with excellent anti-foaming performance is needed to solve the problem.

Method used

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  • Preparation for general defoaming agent and its application
  • Preparation for general defoaming agent and its application
  • Preparation for general defoaming agent and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Add 53 parts of liquid wax with a viscosity of 40 mPas and 4 parts of aluminum stearate into the reaction bottle, start stirring, and slowly raise the temperature. After the temperature rises to 135-140° C., keep the temperature for 2 hours. After the heat preservation is completed, add 30 parts of alkylbenzene to it, lower the temperature to 90°C, then add 3 parts of hydrophobic white carbon black and 7 parts of defoaming synergist (R 1 =CH 3 (CH 2 ) 17 -, R 2 =CH 3 (CH 2 ) 10 CO-, x=20, y=50), and kept at 85-90°C for 1h. After the heat preservation is over, lower the temperature to around 50°C, add 3 parts of nonylphenol polyoxyethylene ether (7) emulsifier, and mix well to obtain defoamer A.

Embodiment 2

[0043] Add 41 parts of alkylbenzene, 2 parts of aluminum stearate and 3 parts of EBS into the reaction flask, start stirring, and slowly raise the temperature. After the temperature rises to 135-140°C, keep it warm for 1 hour. After the heat preservation is completed, add 40 parts of butter to it, when the temperature drops to around 80°C, add 4 parts of hydrophobic white carbon black and 5 parts of defoaming synergist (R 3 =-CH 3 , R 4 =H, p=3, q=5, t=6, m=20, n=70), and kept at 75-85°C for 1h. After the heat preservation is over, when the temperature drops to around 50°C, add 5 parts of oleic acid polyoxyethylene ether (6) and mix evenly to obtain defoamer B.

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Abstract

The invention discloses a general anorganosilicon antifoaming agent compound and preparation thereof, comprising 20-90% by weight of organic hydrocarbons material, 0.5-10% by weight of main antifoaming material, 1-15% by weight of antifoaming synergist and 1-10% by weight of emulsifying agent. The preparation method is: (1) mixing half of organic hydrocarbons material with main antifoaming material, rising the temperature to 80-120 degree C and keeping for 0.5-3h to make sure the main antifoaming material to be dispersed completely; (2) adding the rest of the organic hydrocarbons material and the antifoaming synergist to said mixture in turns, and keeping the temperature at 60-90 degree C for 0.5-2.0h to make sure to be mixed thoroughly; (3) dropping the temperature below 50 degree C, adding the emulsifying agent and mixing blend even. The anorganosilicon antifoaming agent compound substantially improves the defoaming properties of the antifoaming agent based on adding high molecular antifoaming synergist, has the advantage of good stability, little recruitment and good security, and is used in the process of papermaking and coating, circuit board developing and metal cleaning of the paper industry.

Description

technical field [0001] The present invention relates to a kind of chemical composition and preparation method thereof, more precisely the present invention relates to the preparation of a kind of non-organic silicon antifoaming agent, and this antifoaming agent is applicable to papermaking coating, papermaking and circuit board (PCB) processing and other industries. Defoamers belong to fine chemical additives, so the present invention belongs to the technical field of fine chemical preparations. technical background [0002] Defoamer is a kind of fine chemical additive, its main function includes two aspects of defoaming and foam suppression. A good defoamer not only has excellent defoaming and antifoaming properties, but also requires excellent compatibility with other additives and excellent stability in the foaming system. Defoamers are mainly divided into silicone defoamers and non-organosilicon defoamers. Silicone defoamers mainly use oxygen atoms connected to silicon...

Claims

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Application Information

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IPC IPC(8): B01D19/04B01F17/54B01F17/42C09K23/42C09K23/54
Inventor 吴飞曹治平
Owner JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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