Stable alkenyl succinic anhydride sizing emulsion for papermaking and preparation method thereof

An alkenyl succinic anhydride, sizing emulsion technology, applied in the direction of adding inorganic compounds, adding water repellents, etc., can solve the problems of easy generation of bubbles, reduced sizing efficiency, large amount of emulsifier, etc., and achieves good stability and application. The effect of high glue efficiency and simple emulsification process

Inactive Publication Date: 2015-04-15
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above alkenyl succinic anhydride sizing agent, the amount of emulsifier used is large, the sizing efficiency will be reduced, and bubbles are easily generated. The present invention provides an emulsifying A stable alkenyl succinic anhydride paper sizing emulsion with less dosage, simple emulsification process and high sizing efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of emulsifier: disperse 0.85 parts of laponite in 45 parts of water to obtain laponite colloid, disperse 0.0042 parts of alanine in 38 parts of water to obtain alanine aqueous solution, mix the above two liquids, and adjust with acetic acid The pH value is 8, and it is prepared as an ASA emulsifier.

[0023] Emulsification of ASA: Weigh 17 parts of the industrial product ASA, add the emulsifier prepared above into the oily ASA, keep the oil-water ratio 1:5, and use a high-speed stirring device to stir and emulsify at 5000 rpm for 10 minutes. The prepared ASA emulsion is a uniform milky white oil-in-water (O / W) emulsion, the mass percentage of ASA is about 17%, the emulsion is centrifuged under the centrifuge (speed 3000r / min) for 10min without change, no phase body precipitation, no Demulsification phenomenon.

[0024] In-pulp sizing effect: Take 100 parts of hardwood pulp and disperse in 9900 parts of water. After the dispersion is uniform, add 3 parts of ...

Embodiment 2

[0026] Preparation of emulsifier: disperse 0.5 part of laponite in 40 parts of water to obtain laponite colloid, disperse 0.0033 part of alanine in 10 parts of water to obtain alanine aqueous solution, mix the above two liquids, and adjust with hydrochloric acid The pH value is 5, and it is prepared as an ASA emulsifier.

[0027] Emulsification of ASA: Weigh 50 parts of industrial product ASA, add it to the emulsifier prepared above, keep the ratio of oil to water at 1:1, and use high-speed stirring equipment to stir and emulsify at 12000 rpm for 3 minutes. The prepared ASA emulsion is a uniform milky white oil-in-water (O / W) emulsion, the mass percentage of ASA is about 50%, the emulsion is centrifuged under the centrifuge (speed 3000r / min) for 10min without change, no phase body precipitation, no Demulsification phenomenon.

[0028] In-pulp sizing effect: Take 100 parts of hardwood pulp and disperse in 9900 parts of water. After the dispersion is uniform, add 1 part of the ...

Embodiment 3

[0030] Preparation of emulsifier: disperse 0.31 part of laponite in 40 parts of water to obtain laponite colloid, disperse 0.0039 part of alanine in 35 parts of water to obtain alanine aqueous solution, mix the above two liquids, and adjust with hydrochloric acid The pH value is 6, and it is prepared as an ASA emulsifier.

[0031]Emulsification of ASA: Weigh 25 parts of the industrial product ASA, add the emulsifier prepared above into the oily ASA, keep the oil-water ratio 1:3, and use a high-speed stirring device to stir and emulsify at 7000 rpm for 5 minutes. The prepared ASA emulsion is a uniform milky white oil-in-water (O / W) emulsion, the mass percentage of ASA is about 25%, and the emulsion is centrifuged under the centrifuge (rotating speed 3000r / min) for 10min without change, no phase body precipitation, no Demulsification phenomenon.

[0032] In-pulp sizing effect: Take 100 parts of wheat hardwood pulp and disperse it in 9900 parts of water. After the dispersion is ...

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Abstract

The invention relates to a sizing agent in the technical field of papermaking, in particular to stable alkenyl succinic anhydride sizing emulsion for papermaking. The stable alkenyl succinic anhydride sizing emulsion for papermaking comprises deionized water, alkenyl succinic anhydride, hectorite and alanine, wherein a mass ratio of the alkenyl succinic anhydride to the water is 1:(1-5); a mass ratio of the hectorite to the alkenyl succinic anhydride is 1:(20-200); and a mass ratio of the alanine to the hectorite is 1:(20-200). A preparation method is characterized by comprising the following steps of: dispersing the hectorite in the deionized water to obtain a hectorite colloid; adding an aqueous solution of alanine into the hectorite colloid; regulating pH, and uniformly mixing with the alkenyl succinic anhydride (ASA) to obtain the stable alkenyl succinic anhydride sizing emulsion for papermaking. The using amount of an emulsifier is small, and the emulsification cost is low; and the prepared emulsion has high concentration, stability and sizing efficiency. An emulsification process is simple, and the sizing efficiency of the obtained emulsion can be greatly improved.

Description

technical field [0001] The invention relates to a sizing agent in the technical field of papermaking, in particular to a stable alkenyl succinic anhydride papermaking sizing emulsion and a preparation method for the stable alkenyl succinic anhydride papermaking sizing emulsion. Background technique [0002] Alkenyl succinic anhydride, referred to as ASA, is the product of the addition reaction of olefins and maleic anhydride. It is a highly efficient reactive paper-making sizing agent. It has the advantages of fast reaction rate and high sizing efficiency. It is widely used in various paper and cardboard of sizing agent. In the sizing reaction, the acid anhydride groups combine with the hydroxyl groups of the cellulose to fix the ASA molecules on the cellulose, and at the same time make the hydrophobic groups align on the surface of the fibers, thus endowing the fibers with certain water resistance. The particle size of ASA emulsion droplets should be small, and should have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/16D21H17/68
Inventor 王慧丽刘温霞王哲张伟
Owner QILU UNIV OF TECH
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