Lignin modified emulsifier and alkyl ketene dimer (AKD) emulsion prepared from same

A technology of lignin and emulsifier, which is applied in the direction of water-repellent addition, textile and papermaking, and fiber raw material treatment. It can solve the problems of lack of charge and difficulty in achieving the desired effect, and achieve high sizing degree and wide application value. , fast curing effect

Inactive Publication Date: 2019-11-05
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lignin itself does not have sufficient charge, and it is difficult to achieve the desired effect when used directly in place of starch

Method used

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  • Lignin modified emulsifier and alkyl ketene dimer (AKD) emulsion prepared from same
  • Lignin modified emulsifier and alkyl ketene dimer (AKD) emulsion prepared from same
  • Lignin modified emulsifier and alkyl ketene dimer (AKD) emulsion prepared from same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Present embodiment technical scheme is as follows:

[0024] 1. By mass, mix 100 parts of epichlorohydrin, 100 parts of methanol, 100 parts of water, and 120 parts of triethylamine, and react at 50°C for 3 hours.

[0025] 2. Then, after dispersing 100 parts of lignin in NaOH solution, add it to the above system, and continue to react for 3 hours to obtain a modified lignin emulsifier.

[0026] 3. Melt 250 parts of AKD wax in a water bath, slowly add the above modified lignin emulsifier solution, 8000r / min shear emulsification for 3 minutes, add 5 parts of stabilizing agent, 300 parts of water, continue high-speed shearing and stirring for a certain period of time After rapid cooling, discharge.

Embodiment 2

[0028] Present embodiment technical scheme is as follows:

[0029] 1. By mass, mix 80 parts of epichlorohydrin, 110 parts of methanol, 110 parts of water, and 110 parts of triethylamine, and react at 40°C for 2 hours.

[0030] 2. Then, after dispersing 100 parts of lignin in NaOH solution, add it to the above system, and continue to react for 2 hours to obtain a modified lignin emulsifier.

[0031] 3. Melt 200 parts of AKD wax in a water bath, slowly add the above-mentioned modified lignin emulsifier solution, 5000r / min shear emulsification for 2 minutes, add 3 parts of sodium bicarbonate, 200 parts of water, continue high-speed shearing and stirring for a certain period of time After rapid cooling, discharge.

Embodiment 3

[0033] Present embodiment technical scheme is as follows:

[0034] 1. By mass, mix 90 parts of epichlorohydrin, 100 parts of methanol, 100 parts of water, and 110 parts of triethylamine, and react at 45°C for 3 hours.

[0035] 2. Then, after dispersing 100 parts of lignin in NaOH solution, add it to the above system, and continue to react for 2 hours to obtain a modified lignin emulsifier.

[0036] 3. Melt 400 parts of AKD wax in a water bath, slowly add the above modified lignin emulsifier solution, 7000r / min shear emulsification for 2 minutes, add 4 parts of sodium bicarbonate, 400 parts of water, continue high-speed shearing and stirring for a certain period of time After rapid cooling, discharge.

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PUM

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Abstract

The invention discloses a lignin modified emulsifier. The lignin modified emulsifier is prepared from epoxy chloropropane, triethylamine, lignin, methanol and water which react. The invention furtherdiscloses an alkyl ketene dimer (AKD) emulsion, which is prepared from AKD wax and the effective quantity of lignin modified emulsifier. The lignin modified emulsifier is successfully prepared througha series of lignin modification, then the novel AKD emulsion with excellent performance is obtained, and the AKD emulsion has the characteristics of high curing rate and high sizing degree, and has high application value in the field of papermaking.

Description

technical field [0001] The invention relates to the field of AKD sizing agents for papermaking, in particular to a lignin-modified emulsifier and an AKD emulsion prepared by using the emulsifier. Background technique [0002] The purpose of sizing is to make paper or paperboard resistant to the spread and penetration of liquids, suitable for writing and moisture-resistant. In this process, the neutral sizing agent AKD has received extensive attention due to its good performance. [0003] AKD is a waxy solid, which has no charge itself, so it cannot be retained on the fiber. It needs to use a cationic emulsifier to make it have a positive charge. It is adsorbed on the fiber and reacts with it to produce a sizing effect. In the early days, cationic starch was generally used as an emulsifier. Due to the low charge of starch, the retention rate on the fiber is low, and it is prone to mildew, which will affect the stability of the emulsion and the sizing effect in the later sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16D21H17/23C08H7/00
CPCD21H21/16D21H17/23C08H6/00
Inventor 施晓旦沈安成金霞朝
Owner SHANGHAI DONGSHENG NEW MATERIALS
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