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Preparation method for amphiprotic potato starch microcrystalline wax/AKD (Alkyl Ketene dimer) neutral/alkaline sizing agent

A technology of potato starch and microcrystalline wax, which is applied in the direction of water-repellent addition, etc., can solve the problems of poor market competitiveness, high price and high price of AKD emulsion, achieve environmental protection improvement, improve emulsion stability and sizing performance, The effect of applying effect enhancement

Active Publication Date: 2012-09-12
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 that makes is higher, and market competitiveness is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of preparation method of amphoteric potato starch microcrystalline wax / AKD / alkaline sizing agent, comprises the following steps:

[0015] In the first step, add 200 grams of water, 100 grams of potato starch, 2 grams of sodium hydroxide and 1 gram of hydrogen peroxide into the first reactor and react for 1.0 hour at 80 ° C to obtain oxidatively degraded potato starch, water, potato starch, hydrogen peroxide The mass ratio of sodium and hydrogen peroxide is 200:100:2:1, then in the first reactor, add 7 grams of sodium hydroxide and 49 grams of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride, be warming up to 90 ℃ for 2 hours, cooled to 50 ℃ and added 5 grams of acetic acid, then lowered to 20 ℃, the mass ratio of potato starch, sodium hydroxide, 3-chloro-2-hydroxypropyltrimethylammonium chloride and acetic acid was 100: 7:49:5,

[0016] In the second step, add water to the first reactor to adjust the solid content of the system to 20%, to obtain the amphoter...

Embodiment 2

[0020] A kind of preparation method of amphoteric potato starch microcrystalline wax / AKD / alkaline sizing agent, comprises the following steps:

[0021] In the first step, add 200 grams of water, 100 grams of potato starch, 2 grams of sodium hydroxide and 1 gram of hydrogen peroxide into the first reactor and react for 1.1 hours at 81 ° C to obtain oxidatively degraded potato starch, water, potato starch, hydrogen peroxide The mass ratio of sodium and hydrogen peroxide is 200: 100: 2: 1, then in the first reactor, add 7 grams of sodium hydroxide and 49 grams of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride, be warming up to 91 ℃ for 1.8 hours, cooled to 51 ℃ and added 5 grams of acetic acid, and then lowered to 22 ℃, the mass ratio of potato starch, sodium hydroxide, 3-chloro-2-hydroxypropyltrimethylammonium chloride and acetic acid was 100: 7:49:5,

[0022] In the second step, add water to the first reactor to adjust the solid content of the system to 21%, to obtain th...

Embodiment 3

[0026] A kind of preparation method of amphoteric potato starch microcrystalline wax / AKD / alkaline sizing agent, comprises the following steps:

[0027] In the first step, add 200 grams of water, 100 grams of potato starch, 2 grams of sodium hydroxide and 1 gram of hydrogen peroxide into the first reactor and react for 1.2 hours at 82 ° C to obtain oxidatively degraded potato starch, water, potato starch, hydrogen peroxide The mass ratio of sodium and hydrogen peroxide is 200:100:2:1, then in the first reactor, add 7 grams of sodium hydroxide and 49 grams of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride, be warming up to 92 ℃ for 1.6 hours, cooled to 52 ℃ and added 5 grams of acetic acid, then lowered to 24 ℃, the mass ratio of potato starch, sodium hydroxide, 3-chloro-2-hydroxypropyltrimethylammonium chloride and acetic acid was 100: 7:49:5,

[0028]In the second step, add water to the first reactor to adjust the solid content of the system to 22%, to obtain the amphot...

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Abstract

The invention relates to a preparation method for amphiprotic potato starch microcrystalline wax / AKD (Alkyl Ketene dimer) neutral / alkaline sizing agent. The preparation method comprises the steps of: firstly performing oxidative degradation on potato starch under action of hydrogen peroxide, performing cationization on the oxidatively degraded potato starch with 3-chlorine-2-trimethylhydroxypropyl chloride under action of sodium hydroxide, and neutralizing by acetic acid to obtain amphiprotic potato starch emulsifier; and finally emulsifying the AKD and NO.76 microcrystalline wax to obtain amphiprotic potato starch microcrystalline wax / AKD (Alkyl Ketene dimer) neutral / alkaline sizing agent. The prepared amphiprotic potato starch microcrystalline wax / AKD (Alkyl Ketene dimer) neutral / alkaline sizing agent has positive charge and negative charge, thus being beneficial to tight bonding with paper fibers, and greatly improving the sizing property; in the preparation process, the amphiprotic potato starch with cheap price is used as the emulsifier, and the NO.76 microcrystalline wax with cheap price is used for replacing part of AKD with higher price, so that not only can the emulsion stability and sizing property be improved, but also the sizing cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of polymer chemical sizing agents, and in particular relates to a preparation method of amphoteric potato starch microcrystalline wax / AKD medium / alkaline sizing agents. 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 compos...

Claims

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Application Information

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IPC IPC(8): D21H21/16C08B31/18C08B31/12
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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