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AKD neutral sizing agent prepared by cationic emulsifier and its method and application

A technology of cationic emulsifier and neutral sizing agent, applied in the direction of water repellent addition, etc., can solve the problems of paper penetration, no antibacterial property, high emulsifier dosage, etc., and achieve easy storage, strong ion interference resistance, The effect of low dosage

Inactive Publication Date: 2018-06-12
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the sizing agent emulsion also has the advantages of high sizing degree, no aging period, no sizing lag, and stable emulsion, it can only be used in surface sizing, not in slurry sizing. It is easy to cause paper penetration, and it does not have antibacterial properties; in addition, the amount of non-ionic emulsifier is relatively high compared to the amount of emulsifier used in the patent of the present invention, which cannot better meet people's more needs for paper, which limits its application

Method used

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  • AKD neutral sizing agent prepared by cationic emulsifier and its method and application
  • AKD neutral sizing agent prepared by cationic emulsifier and its method and application
  • AKD neutral sizing agent prepared by cationic emulsifier and its method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Add 100kg of AKD wax flakes and 5kg of cetyltrimethylammonium bromide into the emulsification kettle, and raise the temperature to 85°C. The cutting speed is 1000r / min, after stirring for 5 minutes, slowly add preheated water, and the addition is completed in 5 minutes, increase the shearing speed at 10000r / min, stir for 30 minutes, and quickly cool through the heat exchanger, and the cold water in the heat exchanger The temperature is -15°C to -10°C, and finally an O / W (water-in-oil) emulsion is obtained. Add this emulsion to the sizing starch on the surface of the paper machine, and the dosage per ton of paper is 10-15kg.

Embodiment 2

[0033] Add 100kg AKD wax powder, 1kg octadecyltrimethylammonium chloride, 1kg octadecyltrimethylammonium bromide to the emulsification kettle, heat up to 80°C, wait for AKD and emulsifier to melt, preheat 800kg water At 80°C, turn on the high-shear emulsification head, the shear speed is 1000r / min, after stirring for 3 minutes, slowly add the preheated water, and finish adding in 5 minutes, increase the shear speed to 10000r / min, stir for 25 minutes, Rapid cooling yields an O / W emulsion. The amount of this emulsion added to the pulp per ton of paper can be 2-10kg.

Embodiment 3

[0035] Add 100kg AKD and 4kg eicosyltrimethylammonium chloride to the emulsification kettle, raise the temperature to 80°C, wait for the AKD and emulsifier to melt, preheat 900kg water to 80°C, turn on the high-shear emulsification head, the shear speed After stirring at 2000r / min for 5 minutes, slowly add preheated water and finish adding in 5 minutes, increase the shear rate at 10000r / min, stir for 30 minutes, and cool rapidly to obtain an O / W emulsion. The amount of this emulsion added to the sizing starch on the surface of the paper machine per ton of paper is 2-6kg.

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Abstract

The invention discloses an AKD neutral sizing agent prepared by a cationic emulsifier and a preparation method and application of the AKD neutral sizing agent and relates to the field of papermaking chemicals. The method includes: mixing the solid cationic emulsifier with AKD according a certain proportion under room temperature, and melting at 80-85 DEG C; slowly adding hot water into the melt AKD / emulsifier mixture, performing shearing stirring at the speed of 1000-2000r / minute for 2-5 minutes; increasing the shearing stirring speed to 10000r / minute, and stirring at high speed for 25-30 minutes, stopping stirring, using cold water for fast cooling to obtain the sizing agent emulsion. The AKD sizing agent prepared by the method is good in water resistance, free of a curing period, good in emulsion stability, antibacterial, and the like.

Description

technical field [0001] The invention relates to the field of papermaking chemicals, in particular to an AKD neutral sizing agent prepared from a cationic emulsifier, a method and an application. Background technique [0002] In recent years, AKD neutral sizing agents mostly use high-charge-density polydiallyldimethylammonium chloride as an emulsifier. Compared with starch-based AKD neutral sizing agents, its retention rate on fibers And the reaction rate with fibers has been significantly improved, but the viscosity of polydiallyl dimethyl ammonium chloride is high, and transportation and use are extremely inconvenient. Polydiallyl dimethyl ammonium chloride emulsified The stability of AKD neutral sizing agent is poor, and delamination often occurs during transportation, which affects the popularization of high charge density resin type AKD neutral sizing agent. [0003] At present, AKD sizing agent is mostly used for sizing, especially for food packaging paper, but traditi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/16
CPCD21H21/16
Inventor 陈夫山宋晓明刘丹凤
Owner QINGDAO UNIV OF SCI & TECH
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