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ASA emulsion sizing agent and preparation method thereof

A technology of ASA emulsion and sizing agent, which is applied in the direction of water-repellent addition and inorganic compound addition 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 low sizing efficiency and poor stability of the above sizing agents, the present invention provides an ASA emulsion with good stability and high sizing efficiency Sizing agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Gradually add 1 part hectorite powder to preheated to 80°C with constant stirring o 50 parts of deionized water of C, after uniform dispersion, cooled to room temperature, and after standing for 48 hours, the pH value was adjusted to about 6 with 1% hydrochloric acid as the water phase; 0.17 parts of nano titanium dioxide (primary particle size about 80 nm) Disperse with stirring in 100 parts of ASA as the oil phase. Add the above-prepared water phase into the oil phase under stirring, and use high-speed emulsification and shearing equipment to stir and emulsify at a speed of 10,000 rpm for 2 minutes to obtain a stable and uniform oil-in-water ASA emulsion. The mass percentage of ASA is about 66.7%.

[0027] Take 100 parts of beating degree is about 45 o SR poplar bleached thermomechanical pulp was added to 9900 parts of water, after being decomposed by a fiber disintegrator, 0.5 part of the ASA emulsion sizing agent prepared above was added, stirred for 2 minutes at ...

Embodiment 2

[0029] Gradually add 0.5 parts of hectorite powder to the preheated to 80 o 50 parts of deionized water of C, after uniform dispersion, cooled to room temperature, and after standing for 48 hours, adjusted the pH value to about 6 with 5% aluminum sulfate, as the water phase; Disperse under stirring in 75 parts of hexadecenyl succinic anhydride as the oil phase. Add the water phase prepared above into the oil phase under stirring, and use high-speed emulsification and shearing equipment to stir and emulsify at a speed of 7500 rpm for 3 minutes to obtain a stable and uniform oil-in-water ASA emulsion. The mass percentage of hexadecenyl succinic anhydride is about 60%.

[0030] Take 100 parts of beating degree is about 45 o SR poplar bleached thermomechanical pulp was added to 9900 parts of water, after being decomposed by a fiber disintegrator, 0.5 part of the ASA emulsion sizing agent prepared above was added, stirred for 2 minutes at a speed of 750 rpm, and 1 part of Al 2 (SO...

Embodiment 3

[0032] Gradually add 1 part hectorite powder to preheated to 80°C with constant stirring o 50 parts of deionized water of C, after uniform dispersion, cooled to room temperature, after standing for 48 hours, diluted to 100 parts with deionized water, and adjusted the pH value to about 6 with 1% hydrochloric acid, as the water phase; 0.05 parts of nano Titanium dioxide (primary particle size about 18 nm) was dispersed in 50 parts of octadecenyl succinic anhydride with stirring as the oil phase. Add the above-prepared water phase into the oil phase under stirring, and use high-speed emulsification and shearing equipment to stir and emulsify at a speed of 5000 rpm for 3 minutes to obtain a stable and uniform oil-in-water ASA emulsion. The mass percentage of octadecenyl succinic anhydride is about 33.3%.

[0033] Take 100 parts of beating degree is about 45 o SR poplar bleached thermomechanical pulp was added to 9900 parts of water, and after being decomposed by a fiber disinteg...

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Abstract

The present invention relates to the technical field of a sizing agent in the paper industry, and specifically to an ASA emulsion sizing agent. The ASA emulsion sizing agent comprises alkenyl succinic anhydride, hectorite, nano-titanium dioxide and deionized water, wherein a mass ratio of the alkenyl succinic anhydride to the deionized water is 1:0.5-4, a mass ratio of the hectorite to the alkenyl succinic anhydride is 1:20-200, and a mass ratio of the nano-titanium dioxide to the hectorite is 1:6-50. The preparation method for the ASA emulsion sizing agent comprises: dispersing the hectorite in the deionized water, and adjusting the pH value to 6-7 to obtain the aqueous phase; dispersing the nano-titanium dioxide in the alkenyl succinic anhydride to obtain the oil phase, and uniformly mixing the aqueous phase and the oil phase to prepare the ASA emulsion sizing agent. According to the present invention, the additions of any surfactants are not required, and the prepared ASA emulsion sizing agent has characteristics 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 ASA emulsion sizing agent and a preparation method of the ASA emulsion sizing agent. Background technique [0002] The purpose of internal pulp sizing is to reduce the surface energy of paper to slow down or prevent the penetration and diffusion of liquid (mainly water) in paper. Alkenyl succinic anhydride, referred to as ASA (alkenyl succinic anhydride) is a commonly used reactive internal slurry sizing agent, which is a water-insoluble oily substance with highly reactive succinic anhydride groups and long-chain alkenyl groups. The former is used for Binds to the fibers, which provide water repellency to the paper. Because paper is mostly made with water as the medium, ASA needs to be emulsified into an oil-in-water emulsion before sizing, and considering that the acid anhydride is easily hydrolyzed, at present, polymers and surfactants ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16D21H17/67
Inventor 刘温霞刘宗印王兴琪王慧丽王哲
Owner QILU UNIV OF TECH
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