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Alkali resistant emulsion type defoaming agent

An emulsifying and defoamer technology, applied in the direction of foam dispersion/prevention, etc., can solve the problems of high safety performance of non-silicon defoamer, surface defects of coating film, poor wetting performance, etc., and achieves good stability and dosage. Less and more efficient

Inactive Publication Date: 2015-06-10
QINGDAO HAOTAI WATER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silicone defoaming additives are small, low surface tension, non-physiological toxicity, etc., but when used in water-based coatings, water-based inks and other water-based systems, it is easy to produce surface defects, poor wettability, poor compatibility, etc., and in In some cases, the safety performance of non-silicon defoamers is relatively high

Method used

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  • Alkali resistant emulsion type defoaming agent
  • Alkali resistant emulsion type defoaming agent
  • Alkali resistant emulsion type defoaming agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012]

[0013] The preparation method is as follows: glycerin is used as an initiator, and a catalyst is added to generate potassium glycerol, which is subjected to ring-opening polymerization with polyoxyethylene, and then polyoxypropylene is added to polymerize to form a block copolymer. Dissolve potassium hydroxide in glycerin to prepare potassium glycerol, put it into a polymerization kettle, heat it to 95°C, continuously put in polyoxypropylene for polymerization, adjust the reaction temperature to 95-100°C with water, and set the polymerization pressure below 500MPa. After the polymerization is completed, slowly Put in polyoxyethylene, polymerize according to the above conditions, after the reaction is completed, neutralize to neutral with oxalic acid, add activated carbon for decolorization, and obtain the finished product after filtration.

[0014] It is a non-ionic surfactant with excellent defoaming and anti-foaming functions. It is non-toxic, insoluble in water, ...

Embodiment 2

[0016]

[0017] The preparation method is the same as above.

[0018] After dissolving in water, it can reduce the surface tension of water and has defoaming effect.

Embodiment 3

[0020]

[0021]

[0022] The preparation method is the same as above.

[0023] Under high temperature and strong alkali conditions, it can defoam rapidly and keep foam suppressed for a long time. Good stability, low consumption, high efficiency, no oil drift; widely used in paper cooking black liquor treatment, strong alkali refining agent in textile printing and dyeing industry, cleaning agent under strong alkali conditions and other high temperature and strong alkali water phase systems defoaming.

[0024] This product can replace soybean oil as a defoamer with high efficiency and non-toxicity. Concentration of 3% to 5% aqueous solution, the defoaming rate is 25 to 30 times higher than that of soybean oil. This product is used to remove a large amount of foam produced in the process of cleaning the pre-film in the industrial circulating cooling water system. This product can quickly spread to the entire surface of the foam liquid. Since the product is a self-emulsi...

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Abstract

The invention provides an alkali resistant emulsion type defoaming agent, which is composed of glycerol, polyoxyethylene, poly-oxypropylene, potassium hydroxide, an initiating agent and oxalic acid activated carbon. The preparation method is as follows: the glycerol as an initiator is added with a catalyst for production of glycerol potassium, ring opening polymerization of the glycerol potassium and the polyoxyethylene is performed, the poly-oxypropylene is added for polymerization to obtain a block copolymer, the potassium hydroxide is dissolved in glycerol to prepare the glycerol potassium, the glycerol potassium is added into a polymerization reactor, the polymerization reactor is heated to 95 DEG C, the poly-oxypropylene is continuously put in for polymerization, the temperature is regulated with water to 95 to 100 DEG C, when the polymerization pressure is 500MPa below, the polymerization is completed, the polyoxyethylene is put in for polymerization according to the above conditions, after the reaction is completed, oxalic acid is used for neutralization to neutral, activated carbon is added for decoloration, and a finished product is obtained by filtering.

Description

technical field [0001] The invention relates to the preparation of a defoamer, in particular to an alkali-resistant emulsified defoamer, which belongs to the field of environmental protection. Background technique [0002] In many industrial production processes, a large amount of foam is often generated due to stirring, vibration, boiling and the addition of surfactants. If not properly suppressed, the foam will cause product quality and production capacity to decline. The most effective and economical method is Add defoamer. At present, there are many types of defoamers in the market, which can be divided into alcohols, fatty acids, amides, polyethers, polysiloxanes, etc. according to their chemical composition; according to the different active components, they can be divided into silicone defoamers, non- Silicon defoamer. Silicone defoaming additives are small, low surface tension, non-physiological toxicity, etc., but used in water-based coatings, water-based inks and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04C08G65/28C08G81/00
Inventor 张学珍张森
Owner QINGDAO HAOTAI WATER
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