CN102162203A - Method for producing polyether defoaming agent for papermaking - Google Patents
Method for producing polyether defoaming agent for papermaking Download PDFInfo
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- CN102162203A CN102162203A CN2010101266273A CN201010126627A CN102162203A CN 102162203 A CN102162203 A CN 102162203A CN 2010101266273 A CN2010101266273 A CN 2010101266273A CN 201010126627 A CN201010126627 A CN 201010126627A CN 102162203 A CN102162203 A CN 102162203A
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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
Affiliated technical field:
Product of the present invention belongs to the chemical industry field of papermaking.
Background technology:
In paper industry, the slurrying unit operations after the rotary spherical digester discharging all has foam in various degree to exist up to painting process, and foam seriously affects ordinary production and paper quality.Therefore, people take many methods to eliminate the foam of paper pulp system.Chemical method is most widely used in paper industry at present, the operation principle of this method is: special surfactant is that defoamer comes control foam to add a class in process of production, this class material has stronger surface-activity, can replace or destroy the foaming agent in the production system, reduce surface tension, make it can't form firm vacuolar membrane, thereby cause lather collapse.The defoamer kind of using in each operation of papermaking is also different, and polyether antifoam agent is mainly used in the painting process in paper industry.Because the existence of foamers such as pigment, alkali, mechanical agitation has been introduced air in the microenvironment of system, increased the boundary of microenvironment, forms by liquid film, the gentle three-phase froth that combines of solia particle, thereby produced white point on paper surface.In order to eliminate white point, and make that papery is even, the pattern exquisiteness when pure white smooth, the firm homogeneous of coating of paper and printing is clear, must add appropriate amount of defoamer in painting process.Defoamer and slurrying defoamer that painting process uses are different, and the defoamer that the latter adds promptly breaks away from paper pulp at washing procedure, and the former then is retained in the paper product, and be very big to the paper quality influence.Painting process requires technically: the adding of any paper making additive all has no side effect to all characteristics of paper, and in fact, polyether antifoam agent does not only have influence to the performance of paper, also has froth breaking, presses down bubble, glazing, multiple function such as lubricated.At present both at home and abroad the main active component of painting process defoamer generally is polyethers, because the froth breaking of polyether antifoam agent, to press down the bubble function all very strong, is very suitable for the use of painting process.Polyether antifoam agent is not only the indispensable auxiliary agent kind of paper industry, and in many industry such as detergents and cosmetic, weaving, oil, food, rubber important use is arranged all.
Summary of the invention:
Use the defective that easily causes white point in the painting process stage in order to overcome traditional defoamer, the invention provides a kind of novel polyether antifoam agent, that the froth breaking of this defoamer suppresses is effective, easy and simple to handle, not only the quality of paper is not had influence, can also improve glossiness, gigging speed and the greasy property of paper, this defoamer mainly uses in painting process.Producing the raw material that this defoamer uses has: 1. 24 parts of liquid epoxy ethane-propylene oxide block copolymers (major ingredient is a kind of non-ionic surface active agent, is called for short polyethers); 2. 4 parts of polyethylene glycol (dispersant); 3. 65 parts of alkylphenol polyoxyethylene polyethenoxy ethers (emulsifying agent); 4. 3 parts of silica (modifier); 5. 1 part in sodium carbonate (being used to adjust the pH value of polyether antifoam agent); 6. 3 parts of odium stearate (stabilizing agent).
The invention has the beneficial effects as follows: the polyether antifoam agent that uses in a kind of paper making and cloth coating operation can be removed the white point on the page in use, and does not influence the quality of paper, can also improve glossiness, gigging speed and the greasy property of paper.
The specific embodiment:
Embodiment:
The first step: in 65 parts of adding reaction vessels of emulsifying agent, temperature is brought up to 55 ℃, start agitator and stir with 30 rev/mins rotating speed, add 24 parts of liquid epoxy ethane-propylene oxide block copolymers slowly, stir, add 4 parts of polyethylene glycol, continue to stir insulation reaction 1 hour.
Second step: add 3 parts of silica, continue to stir insulation reaction 1 hour, add an amount of sodium carbonate again, the pH value of adjusting defoamer is about 8.5.
The 3rd step: be cooled to normal temperature,, continue stirring reaction and obtain finished product after 0.5 hour with 3 parts of addings of odium stearate.
Claims (4)
1. the production method of a paper grade (stock) polyether antifoam agent, it is characterized in that with: 1. 24 parts of liquid epoxy ethane-propylene oxide block copolymers, 4 parts of polyethylene glycol, 65 parts of alkylphenol polyoxyethylene polyethenoxy ethers, 3 parts of silica, 1 part in sodium carbonate, odium stearate are raw material for 3 parts, by three the step finish entire reaction course, obtain finished product.
2. the production method of a kind of paper grade (stock) polyether antifoam agent according to claim 1, the feature of its first step is: in 65 parts of adding reaction vessels of emulsifying agent, temperature is brought up to 55 ℃, starting agitator stirs with 30 rev/mins rotating speed, add 24 parts of liquid epoxy ethane-propylene oxide block copolymers slowly, stir, add 4 parts of polyethylene glycol, continue to stir insulation reaction 1 hour.
3. the production method of a kind of paper grade (stock) polyether antifoam agent according to claim 1, the feature in its second step is: add 3 parts of silica, continue to stir insulation reaction 1 hour, add an amount of sodium carbonate again, the pH value of adjusting defoamer is about 8.5.
4. the production method of a kind of paper grade (stock) polyether antifoam agent according to claim 1, the feature in its 3rd step is: be cooled to normal temperature, with 3 parts of addings of odium stearate, continue stirring reaction and obtain finished product after 0.5 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101266273A CN102162203A (en) | 2010-02-23 | 2010-02-23 | Method for producing polyether defoaming agent for papermaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101266273A CN102162203A (en) | 2010-02-23 | 2010-02-23 | Method for producing polyether defoaming agent for papermaking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102162203A true CN102162203A (en) | 2011-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2010101266273A Pending CN102162203A (en) | 2010-02-23 | 2010-02-23 | Method for producing polyether defoaming agent for papermaking |
Country Status (1)
| Country | Link |
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| CN (1) | CN102162203A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102875797A (en) * | 2012-10-19 | 2013-01-16 | 大连广汇科技有限公司 | Synthesis method of polyether defoamer |
| CN103103878A (en) * | 2012-12-31 | 2013-05-15 | 天津市奥东化工有限公司 | Cation modified sesbania gum surface sizing agent and preparation method thereof |
-
2010
- 2010-02-23 CN CN2010101266273A patent/CN102162203A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102875797A (en) * | 2012-10-19 | 2013-01-16 | 大连广汇科技有限公司 | Synthesis method of polyether defoamer |
| CN103103878A (en) * | 2012-12-31 | 2013-05-15 | 天津市奥东化工有限公司 | Cation modified sesbania gum surface sizing agent and preparation method thereof |
| CN103103878B (en) * | 2012-12-31 | 2015-07-15 | 李端 | Cation modified sesbania gum surface sizing agent and preparation method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110824 |