Preparation method for cation potato starch microcrystalline wax/alkyl ketene dimer (AKD) neutral/basic sizing agent

A potato starch, cationic technology, applied in wax addition, water repellent addition, paper and other directions, can solve the problems of high price of AKD emulsion, poor market competitiveness and high price, and improve emulsion stability and sizing performance, environmental protection The effect of improved protection and improved application effect

Active Publication Date: 2012-08-15
盐城青墩津邦水务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its price is higher, thus the AKD emulsion price t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Example one

[0014] A preparation method of cationic potato starch microcrystalline wax / AKD medium / alkaline sizing agent includes the following steps:

[0015] In the first step, 200 grams of water, 100 grams of potato starch and 0.5 grams of fungal alpha-amylase were added to the first reactor and reacted for 1.0 hour at 50°C to obtain degraded potato starch, water, potato starch and fungal alpha-amylase. The mass ratio is 200:100:0.5, then 7 grams of sodium hydroxide is added to the first reactor, the temperature is raised to 60 ℃, 49 grams of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride is added, and then the temperature is raised to React at 90°C for 2 hours, add 5 grams of acetic acid to the temperature to 50°C, then reduce to 40°C, the mass ratio of potato starch, sodium hydroxide, 3-chloro-2-hydroxypropyltrimethylammonium chloride and acetic acid is 100 :7:49:5,

[0016] In the second step, water is added to the first reactor to adjust the solid content of th...

Example Embodiment

[0019] Example two

[0020] A preparation method of cationic potato starch microcrystalline wax / AKD medium / alkaline sizing agent includes the following steps:

[0021] In the first step, 200 grams of water, 100 grams of potato starch and 0.5 grams of fungal alpha-amylase were added to the first reactor to react for 1.2 hours at 51°C to obtain degraded potato starch, water, potato starch and fungal alpha-amylase. The mass ratio is 200:100:0.5, then 7 grams of sodium hydroxide is added to the first reactor, the temperature is raised to 62 ℃, 49 grams of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride is added, and then the temperature is raised to React at 91°C for 1.8 hours. Cool down to 51°C and add 5 grams of acetic acid, then reduce to 32°C. The mass ratio of potato starch, sodium hydroxide, 3-chloro-2-hydroxypropyltrimethylammonium chloride and acetic acid is 100. :7:49:5,

[0022] In the second step, water is added to the first reactor to adjust the solid content of the sy...

Example Embodiment

[0025] Example three

[0026] A preparation method of cationic potato starch microcrystalline wax / AKD medium / alkaline sizing agent includes the following steps:

[0027] In the first step, 200 grams of water, 100 grams of potato starch and 0.5 grams of fungal alpha-amylase are added to the first reactor to react for 1.4 hours at 52°C to obtain degraded potato starch, water, potato starch and fungal alpha-amylase. The mass ratio is 200:100:0.5, then 7 grams of sodium hydroxide is added to the first reactor, the temperature is increased to 64 ℃, 49 grams of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride is added, and the temperature is increased to React at 92°C for 1.6 hours. Cool down to 52°C and add 5 grams of acetic acid, then reduce to 34°C. The mass ratio of potato starch, sodium hydroxide, 3-chloro-2-hydroxypropyltrimethylammonium chloride and acetic acid is 100. :7:49:5,

[0028] In the second step, water is added to the first reactor to adjust the solid content of the ...

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Abstract

The invention discloses a preparation method for a cation potato starch microcrystalline wax/alkyl ketene dimer (AKD) neutral/basic sizing agent, which comprises the following steps of: degrading potato starch under the action of fungal alpha-amylase; then, performing cationization on the degraded potato starch by using 3-chloro-2-hydroxypropyltrimethyl ammonium chloride under the action of sodium hydroxide; then, neutralizing by using acetic acid to obtain a cation potato starch emulsifying agent; and finally, emulsifying AKD and 76# microcrystalline wax by using the cation potato starch emulsifying agent to obtain the cation potato starch microcrystalline wax/AKD neutral/basic sizing agent. As positive charges are carried, the prepared cation potato starch microcrystalline wax/AKD neutral/basic sizing agent can be favorably combined with paper fibers with negative charges, therefore, the sizing performance is greatly improved. The cation potato starch with low price is used as the emulsifying agent and the 76# microcrystalline wax with low price is adopted to replace part of AKD with higher price during the preparation process of the cation potato starch microcrystalline wax/AKD neutral/basic sizing agent, therefore, not only are the stability of an emulsion and the sizing performance improved but also the sizing cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of polymer chemical sizing agents, in particular to a preparation method of cationic potato starch microcrystalline wax / AKD medium / alkaline sizing agent. Background technique [0002] The major progress of modern sizing technology is the promotion of medium / alkaline sizing technology. The conversion of acidic papermaking to medium / alkaline papermaking is a major change in the history of papermaking in the world. Medium / alkaline sizing is a sizing method that adjusts the pH value to above 7 during the papermaking process and does not use aluminum sulfate in principle. The commonly used medium / alkaline sizing agent alkyl ketene dimer (AKD for short) is a product researched and developed in the late 1940s. AKD is a reactive medium / alkaline sizing agent that can react with cellulose , it can be used as both internal sizing agent and surface sizing agent. Its structural characteristics are composed of active gr...

Claims

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Application Information

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IPC IPC(8): D21H21/16D21H17/29D21H17/60D21H17/17C08B31/00
Inventor 张国运杨秀芳彭莉刘侠
Owner 盐城青墩津邦水务有限公司
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