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Method for producing polyether defoaming agent for papermaking

A technology of polyether defoaming agent and production method, which is applied in the direction of defoaming agent, etc., can solve the problems of reducing surface tension, failure to form bubble film, foam rupture, etc., and achieve the effect of improving gloss

Inactive Publication Date: 2011-08-24
殷邗清
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the chemical method is the most widely used in the paper industry. The working principle of this method is: add a special surfactant, that is, a defoamer, to control the foam during the production process. This kind of substance has a strong surface activity and can be replaced. Or destroy the blowing agent in the production system, reduce the surface tension, make it impossible to form a strong bubble film, and cause the foam to burst

Method used

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Examples

Experimental program
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Embodiment

[0006] Step 1: Add 65 parts of emulsifier into the reaction vessel, increase the temperature to 55°C, start the agitator to stir at a speed of 30 rpm, and slowly add the liquid ethylene oxide-propylene oxide block copolymer 24 part, stir evenly, add 4 parts of polyethylene glycol, continue to stir and keep warm for 1 hour.

[0007] Step 2: Add 3 parts of silicon dioxide, continue to stir and keep warm for 1 hour, then add an appropriate amount of sodium carbonate, and adjust the pH value of the defoamer to about 8.5.

[0008] The third step: cool down to normal temperature, add 3 parts of sodium stearate, continue to stir and react for 0.5 hours to obtain the finished product.

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PUM

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Abstract

The invention provides a method for producing a polyether defoaming agent for papermaking. The produced product is a defoaming agent applied to the paper coating procedure. The defoaming agent has good defoaming and foam inhibiting effects, is simple and convenient to operate, can remove the white dots on the paper when in used, has no impact on the quality of the paper and can improve the glossiness, napping speed and lubricating property of the paper. The following raw materials are used for producing the defoaming agent: liquid ethylene epoxide-propylene epoxide segmented copolymers, polyethylene glycol, alkylphenol polyoxyethylene polyoxypropylene ether, silica, sodium carbonate and sodium stearate.

Description

Technical field: [0001] The product of the invention belongs to the field of chemical papermaking. Background technique: [0002] In the paper industry, there are different degrees of foam from the operation of the pulping unit after steaming ball discharge to the coating process, and the foam seriously affects the normal production and paper quality. Therefore, people take many methods to eliminate the foam of the pulp system. At present, the chemical method is the most widely used in the paper industry. The working principle of this method is: add a special surfactant, that is, a defoamer, to control the foam during the production process. This kind of substance has a strong surface activity and can be replaced. Or destroy the blowing agent in the production system, reduce the surface tension, make it impossible to form a strong bubble film, and cause the foam to burst. The types of defoamers used in each process of papermaking are also different. Polyether defoamers are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/12
Inventor 殷邗清
Owner 殷邗清