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Preparation method for AKD (Alkyl Ketene Dimer) emulsion and water-resistant treatment method for paper sheets

A technology of emulsion and emulsification machine, which is applied in the direction of water-repellent addition, etc., can solve the problems of low production efficiency, low curing rate off the machine, cumbersome process, etc., and achieve the effects of reducing the degree of hydrolysis, high curing efficiency, and obvious economic benefits

Inactive Publication Date: 2016-03-23
广东志广生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is relatively cumbersome and requires etherification reaction of starch, which has the disadvantages of low production efficiency and low off-machine ripening rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 14g of cationic starch, add 362ml of water to it, raise the temperature to 95°C, and keep it warm for 20min;

[0018] Melt 50g of AKD wax powder at 70°C, add the above cationic starch gelatinization solution, and add 0.3g

[0019] Stabilizer zirconium oxychloride;

[0020] Turn on the emulsifier at a speed of 3000rpm for 10min;

[0021] Quickly homogenize the emulsified AKD emulsion twice, 40MPa, and quickly cool to room temperature to get the finished product

[0022] AKD emulsion, the concentration is 15%;

[0023] Weigh 50g of conventional oxidized starch, add 450g of water to it, raise the temperature to 95°C, keep it warm for 20min, and quickly cool the starch paste to 60-70°C;

[0024] Add 30ml of aluminum sulfate (concentration 10%) and 20ml of AKD emulsion to the conventional oxidized starch gelatinization solution, and stir evenly;

[0025] Use British K303 coater to sizing handmade paper, 0# rod, 25m / min;

[0026] After sizing, the paper is dried in...

Embodiment 2

[0029] Weigh 14g of cationic starch, add 362ml of water to it, raise the temperature to 95°C, and keep it warm for 20min;

[0030] Melt 50g of AKD wax powder at 70°C, add the above cationic starch gelatinization solution, and add 0.3g

[0031] Stabilizer polyethyleneimine;

[0032] Turn on the emulsifier at a speed of 3000rpm for 10min;

[0033] Quickly homogenize the emulsified AKD emulsion twice, 40MPa, and quickly cool to room temperature to get the finished product

[0034] AKD emulsion, the concentration is 15%;

[0035] Weigh 50g of conventional oxidized starch, add 450g of water to it, raise the temperature to 95°C, keep it warm for 20min, and quickly cool the starch paste to 60-70°C;

[0036] Add 30ml of aluminum sulfate (concentration 10%) and 20ml of AKD emulsion to the conventional oxidized starch gelatinization solution, and stir evenly;

[0037] Use British K303 coater to sizing handmade paper, 0# rod, 25m / min;

[0038] After sizing, the paper is dried in an ...

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Abstract

The invention discloses a preparation method for an AKD (Alkyl Ketene Dimer) emulsion and a water-resistant treatment method for paper sheets. The preparation method comprises the following steps of firstly, gelatinizing cationic starch, melting AKD wax powder at the temperature of 70 DEG C, then, pouring the gelatinized starch into the melted AKD wax powder, adding a stabilizer into the melted AKD wax powder, turning on an emulsifying machine to carry out emulsification, carrying out homogenization treatment on the solution, and carrying out rapid cooling, thereby obtaining the AKD emulsion. According to the preparation method for the AKD emulsion, disclosed by the invention, on the premise of guaranteeing the water resistance of the AKD emulsion, no starch etherifying process is carried out, and the gelatinized starch is directly used for emulsifying AKD after the starch is gelatinized, so that the equipment and labor investment of AKD emulsion manufacturers can be reduced, the aging efficiency of the AKD emulsion is high, the degree of hydrolysis of the AKD is greatly lowered, the water resisting effect is effectively guaranteed, and the economic benefit is obvious.

Description

technical field [0001] The invention belongs to the field of papermaking chemicals, and in particular relates to a preparation method of AKD emulsion and a paper water-resistant treatment method. Background technique [0002] In the paper industry, many paper types are required to have certain water resistance, and both internal sizing and surface sizing can endow paper with water resistance. The present invention relates to AKD emulsions for surface sizing. The preparation process of the conventional AKD emulsion is to cationize the ordinary starch first, then mix the cationized starch with the melted AKD, add a stabilizer, stir and homogenize to obtain the AKD emulsion. The process is relatively cumbersome and requires etherification reaction of starch, which has the disadvantages of low production efficiency and low off-machine curing rate. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiency of prior art, provide a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16C08B31/00
CPCD21H21/16C08B31/00
Inventor 尚高峰郑旭钊林桂林郑熙源林格王巍陈惠邓日灵
Owner 广东志广生物科技有限公司
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