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Method for preparing solvent-free polyether grafting organosilico/diamide compound emulsion defoamer

A compound emulsion and bisamide technology, applied in the chemical field, can solve the problems of poor anti-foaming ability, inability to defoam instantly, and poor stability of defoaming agents, etc., and achieve the effect of reducing the hazards of operators and the environment and cost-effective

Inactive Publication Date: 2010-02-03
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used emulsifier of silicone defoamer emulsion is a compound of span and tween, etc., and is equipped with an appropriate amount of co-emulsifier. The prepared defoamer has poor stability, is controlled by cloud point, and cannot defoam instantaneously , and poor foam suppression ability

Method used

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  • Method for preparing solvent-free polyether grafting organosilico/diamide compound emulsion defoamer
  • Method for preparing solvent-free polyether grafting organosilico/diamide compound emulsion defoamer
  • Method for preparing solvent-free polyether grafting organosilico/diamide compound emulsion defoamer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Preparation of polyether modified silicone oil:

[0026] First, the catalyst chloroplatinic acid and the solvent isopropanol are uniformly mixed in a mass ratio of 1:99 to prepare a chloroplatinic acid catalyst solution;

[0027] Then, add hydrogen-containing silicone oil and allyl polyoxyethylene polyoxypropylene ether into the drying reactor, wherein the mass ratio of hydrogen-containing silicone oil and allyl polyoxyethylene polyoxypropylene ether is 2:1, and stir it evenly. Get mixed solution B;

[0028] Finally, when the mixed solution B is heated to 60°C, the chloroplatinic acid catalyst solution is added dropwise, wherein the platinum content of the chloroplatinic acid catalyst solution and the mass ratio of the mixed solution B are 0.001:100, and the temperature is kept for 8 hours to obtain a liquid Polyether modified silicone oil;

[0029] 2) Preparation of silicon paste:

[0030] Add bisamide and dimethyl silicone oil to the reactor, where the mass ratio of bisami...

Embodiment 2

[0042] 1) Preparation of polyether modified silicone oil:

[0043] First, the catalyst chloroplatinic acid and the solvent isopropanol are uniformly mixed in a mass ratio of 1:99 to prepare a chloroplatinic acid catalyst solution;

[0044] Then, add hydrogen-containing silicone oil and allyl polyoxyethylene polyoxypropylene ether into the drying reactor, wherein the mass ratio of hydrogen-containing silicone oil and allyl polyoxyethylene polyoxypropylene ether is 1:1, and stir it evenly. Get mixed solution B;

[0045] Finally, when the mixed solution B is heated to 100°C, the chloroplatinic acid catalyst solution is added dropwise, in which the platinum content of the chloroplatinic acid catalyst solution and the mass ratio of the mixed solution B are 0.002:100, and the temperature is kept for 2 hours to obtain a liquid Polyether modified silicone oil;

[0046] 2) Preparation of silicon paste:

[0047] Add bisamide and dimethyl silicone oil to the reactor, where the mass ratio of bisa...

Embodiment 3

[0053] 1) Preparation of polyether modified silicone oil:

[0054] First, the catalyst chloroplatinic acid and the solvent isopropanol are uniformly mixed in a mass ratio of 1:99 to prepare a chloroplatinic acid catalyst solution;

[0055] Then, add hydrogen-containing silicone oil and allyl polyoxyethylene polyoxypropylene ether into the drying reactor, wherein the mass ratio of hydrogen-containing silicone oil and allyl polyoxyethylene polyoxypropylene ether is 0.5:1, and stir it evenly. Get mixed solution B;

[0056] Finally, when the mixed solution B is heated to 120°C, the chloroplatinic acid catalyst solution is added dropwise. The platinum content of the chloroplatinic acid catalyst solution and the mass ratio of the mixed solution B are 0.003:100, and the temperature is kept for 6 hours to obtain a liquid Polyether modified silicone oil;

[0057] 2) Preparation of silicon paste:

[0058] Add bisamide and dimethyl silicone oil to the reactor, where the mass ratio of bisamide an...

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Abstract

The invention discloses a method for preparing a solvent-free polyether grafting organosilico / diamide compound emulsion defoamer. Under the action of chloroplatinic acid-isopropanol catalyst, hydrogen-containing silicone oil, allyl polyether and the like are used as raw materials to prepare serial polyether graft-modification organosilico surfactant in a solvent-free and dark condition; simultaneously, diamide and dimethyl silicon oil are used for reaction so as to obtain diamide silicon paste; and the serial compound emulsion defoamer is obtained by modifying the emulsification caused by theorganosilico to the silicon paste. In the preparation process no organic solvent needs to be added so that harm to operators and the environment can be reduced; in addition, the compound emulsion defoamer has the advantages of a plurality of defoaming components of the polyether, the organosilico and the diamide, not only can realize instant defoaming but also can inhibit foams for a long time, therefore the compound emulsion defoamer has high cost performance.

Description

Technical field [0001] The invention belongs to the field of chemistry, and particularly relates to a preparation method of a solvent-free polyether grafted organosilicon / bisamide composite emulsion defoamer. Background technique [0002] In most industrial production, a large amount of foam is often produced. The existence of foam will seriously affect the quality of the product, and even cause the production to fail to proceed normally. Adding defoamer is a simple and economical way to defoam. Defoamers have been widely used in various fields such as chemical industry, food, textile, printing and dyeing, papermaking, coating, oil extraction, medicine, metal processing and so on. Traditional defoamers such as mineral oil, vegetable oil, alcohol, fatty acid amide and their esters have poor surface activity, low defoaming efficiency, and narrow application range, which can no longer meet the requirements of users. Polyether defoamers have strong foam suppression ability, but have...

Claims

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Application Information

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IPC IPC(8): B01F17/54B01D19/04C09K23/54
Inventor 沈一丁费贵强李刚辉李小瑞王海花李翾
Owner SHAANXI UNIV OF SCI & TECH
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