Alkenyl succinic anhydride emulsion sizing agent and its preparation method

A technology of alkenyl succinic anhydride and sizing agent, which is applied in the direction of water repellent addition, etc., to achieve good stability and high sizing efficiency

Inactive Publication Date: 2012-06-13
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of easy hydrolysis, poor stability and low sizing efficiency of the above alkenyl succinic anhydride sizing agent, the present invention provides a kind of good stability, Alkenyl succinic anhydride emulsion sizing agent with high sizing efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 6 Al 2 (SO 4 ) 2 ?18H 2 O, dispersed in 10 parts of deionized water; another 3.5 parts of concentrated ammonia water with a concentration of 28% was diluted with 10.5 parts of deionized water, and 2 parts of diluted ammonia water were placed in the reactor; after that, 16 parts of aluminum sulfate aqueous solution and 12 parts of diluted ammonia water were added dropwise to the reactor at the same time. After the dropwise addition, the stirring was continued for 30 minutes, and the precipitate was centrifuged and washed with deionized water until pH=8. Take another 4 copies of Al 2 (SO 4 ) 2 ?18H 2 O was dispersed in 8 parts of deionized water and mixed with the above-mentioned washed amorphous aluminum hydroxide, the total weight was adjusted to 30.6 parts with deionized water, and peptized at 40°C for 48 hours to obtain a mass concentration of about 5% ( Press Al 2 o 3 count), [OH - ] / [Al 3+ ] = the polyaluminum sulfate sol of 1.8.

[0028]Take 3 part...

Embodiment 2

[0031] Take 0.9 parts of solid commercial polyaluminum sulfate with an alkalinity of 10% (x=0.3), dilute it to 3 parts with deionized water, and form a polyaluminum sulfate sol; take another 2 parts of commercial nano-titanium dioxide (primary particle size 25nm, hydrophilic type ) in 95 parts of deionized water, add 3 parts of the prepared polyaluminum sulfate sol, and disperse at a speed of 1000 rpm for 10 minutes as the water phase; weigh 25 parts of commercial alkenyl succinic anhydride, and Add the aqueous phase of the alkenyl succinic anhydride, and use a high-speed emulsifying shearing device to stir and emulsify at a speed of 1000 rpm for 5 minutes to obtain a stable and uniform oil-in-water alkenyl succinic anhydride emulsion. The mass percentage of base succinic anhydride is about 20%.

[0032] Take 100 parts of beating degree is about 45 o Add 9900 parts of poplar bleached thermomechanical pulp of SR to water, after being decomposed by a fiber deflagging machine, a...

Embodiment 3

[0034] Take 2.5 parts Al 2 (SO 4 ) 2 ?18H 2 O, dispersed in 4.5 parts of deionized water; another 1.5 parts of concentrated ammonia water with a concentration of 28% was taken, diluted with 4.5 parts of deionized water, and 1 part was placed in the reactor; after that, 7 parts of aluminum sulfate aqueous solution and 5 parts The diluted ammonia water was added dropwise to the reactor at the same time. After the dropwise addition, the stirring was continued for 30 minutes, and the precipitate was centrifuged and washed to about pH8 with deionized water. In addition, take 7.5 parts of Al 2 (SO 4 ) 2 ?18H 2 O was dispersed in 10.5 parts of deionized water, and mixed with the above-mentioned washed amorphous aluminum hydroxide, the total weight was adjusted to 30.6 parts with deionized water, and peptized at 80 ° C for 8 hours to obtain a mass concentration of about 5% ( Press Al 2 o 3 count), [OH - ] / [Al 3+ ] = the polyaluminum sulfate sol of 0.75.

[0035] Take 1 par...

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Abstract

The invention relates to an alkenyl succinic anhydride emulsion sizing agent which belongs to the papermaking industrial sizing agent technical field, and the sizing agent comprises alkenyl succinic anhydride, hydrophilic nanometer titanium dioxide or hectorite, Al2(OH)2x(SO4)3-x and deionized water. The preparation method comprises the following steps: dispersing the hydrophilic nanometer titanium dioxide or hectorite in deionized water, mixing with polyaluminium sulfate sol, taking the mixture as a water phase, alkenyl succinic anhydride is taking as an oil phase, uniformly mixing the water phase and the oil phase. The present invention has the beneficial effects that no any surfactant are required to add, the prepared alkenyl succinic anhydride emulsion sizing agent has the advantages of good stability and high sizing efficiency.

Description

technical field [0001] The invention relates to the technical field of sizing agents in the papermaking industry, in particular to an alkenyl succinic anhydride emulsion sizing agent, and also relates to a preparation method of the alkenyl succinic anhydride emulsion sizing agent. Background technique [0002] Paper is mainly composed of hydrophilic cellulose fibers, so most paper is made with water as the medium, and a certain amount of water resistance is given to the paper by adding an appropriate amount of sizing agent. Paper sizing agents are generally water-insoluble amphiphilic substances. Through the reaction and combination of their hydrophilic groups and cellulose fibers, the macromolecules of the sizing agent are oriented in the paper, that is, the large hydrophobic groups are directed outwards. Reduce the surface energy of the paper and give the paper water resistance. At present, the sizing agent is mostly added to the papermaking system in the form of oil-in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16
Inventor 刘温霞李海东张伟王慧丽王哲
Owner QILU UNIV OF TECH
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