AKD emulsion and preparation method thereof

An emulsion and solution technology, applied in the direction of adding water repellent, can solve the problems of long production cycle, cumbersome process, and low aging rate, and achieve the effect of shortening time consumption, ensuring sizing effect, and reducing the degree of hydrolysis.

Active Publication Date: 2015-04-08
GUANGZHOU TINCI MATERIALS TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is cumbersome and requires pretreatment of the starch emulsifier, resulting in a long production cycle and low off-machine ripening rate

Method used

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  • AKD emulsion and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] A kind of preparation method of AKD emulsion of the present embodiment comprises the steps:

[0032] (1) Put 400 parts of hot water into the reactor, keep the temperature at 75°C, start stirring, put 110 parts of AKD wax powder, 11 parts of cationic starch, and 2 parts of dispersant into the reactor at the same time, stir for 15 minutes, and release Lotion;

[0033] (2) Pour into the homogenizer for homogenization, pass 2 times; the homogenization pressure is 30MPa;

[0034] (3) Then pass the emulsion into 470 parts of frozen water, and add 2 parts of stabilizer and 5 parts of curing agent;

[0035] (4) Continue stirring until the emulsion is cooled to room temperature, and filter to obtain the AKD emulsion.

[0036] The preparation method of described cationic starch comprises the steps:

[0037] A. Put tapioca starch in a reaction vessel, add catalyst (sodium hydroxide) and etherification agent (2,3-epoxypropyltrimethylammonium chloride), stir and heat up to 60°C, ...

Embodiment 2

[0044] A kind of preparation method of AKD emulsion of the present embodiment comprises the steps:

[0045] (1) Put 500 parts of hot water into the reactor, keep the temperature at 80°C, start stirring, put 100 parts of AKD wax powder, 30 parts of cationic starch, and 4 parts of dispersant into the reactor at the same time, stir for 15 minutes, and release Lotion;

[0046] (2) Pour into the homogenizer for homogenization, pass 2 times; the homogenization pressure is 35MPa;

[0047] (3) Then pass the emulsion into 350 parts of frozen water, and add 6 parts of stabilizer and 10 parts of curing agent;

[0048] (4) Continue stirring until the emulsion is cooled to room temperature, and filter to obtain the AKD emulsion.

[0049] The cationic starch used in this embodiment is the same as the preparation method of embodiment 1.

[0050] The solid content of the obtained AKD emulsion is about 15%, the particle size of the emulsion is 2-3um, and the emulsion does not change when ce...

Embodiment 3

[0052] A kind of preparation method of AKD emulsion of the present embodiment comprises the steps:

[0053](1) Put 280 parts of hot water into the reactor, keep the temperature at 85°C, start stirring, put 130 parts of AKD wax powder, 28 parts of cationic starch, and 2 parts of dispersant into the reactor at the same time, stir for 15 minutes, and release Lotion;

[0054] (2) Enter the homogenizer for homogenization, and pass it 2 times; the homogenization pressure is 40MPa;

[0055] (3) Then pass the emulsion into 540 parts of frozen water, and add 2 parts of stabilizer and 18 parts of curing agent;

[0056] (4) Continue stirring until the emulsion is cooled to room temperature, and filter to obtain the AKD emulsion.

[0057] The cationic starch used in this embodiment is the same as the preparation method of embodiment 1.

[0058] The solid content of the obtained emulsion is about 18%, the particle size of the emulsion is 2-4um, and the emulsion does not change when cent...

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Abstract

The invention discloses an AKD emulsion and a preparation method thereof. According to the preparation method of the AKD emulsion, as the process of starch gelatinization is saved, and AKD waxes and other raw materials are simultaneously added in the emulsification process, the operation is simple, and the consumed time is obviously shortened. According to the preparation method, equipment and manpower inputs are reduced, and the inventory of the raw materials are also reduced; in addition, as the prepared emulsified product can be used while being produced, the aging rate of paper leaving the machine is high, the hydrolysis degree of the AKD is greatly lowered, the sizing effect is ensured, and the economical benefit is obvious.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an AKD emulsion and a preparation method thereof. Background technique [0002] In the paper industry, the water resistance and impermeability of paper are generally increased by adding sizing agents. At present, the most commonly used sizing agents for internal pulp sizing are AKD (alkyl ketene dimer) emulsion and ASA (alkenyl succinic anhydride) emulsion. However, because ASA is extremely easy to hydrolyze, has poor storage stability and unstable effect, its application is limited, while the hydrolysis speed of AKD is not as obvious as ASA, the sizing efficiency is high, and the cost is relatively low. These advantages promote its wide use. At the same time, AKD emulsion can be used for both internal sizing and surface sizing. AKD is a waxy solid at room temperature and insoluble in water. It is an unsaturated lactone, which reacts with hydroxyl groups on cellulose ...

Claims

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Application Information

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IPC IPC(8): D21H21/16C08B31/00
Inventor 付小龙英瑜彭渊吴海龙李琳徐三善
Owner GUANGZHOU TINCI MATERIALS TECH
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