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Modified hydrotalcite stabilized AKD (Alkyl Ketene Dimer) emulsion sizing agent and preparation method thereof

A technology of modifying water and sizing agent, which is applied in the direction of water repellent addition, etc., which can solve the problems of not being able to obtain AKD emulsion, achieve good dispersion, fast curing speed, and improve water resistance

Inactive Publication Date: 2014-05-07
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, no matter whether hydrotalcite and bentonite are used as emulsifiers or hydrotalcite alone is used as emulsifier, AKD emulsion cannot be obtained

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Weigh 1 part of alanine and 1 part of sodium hydroxide and dissolve it in 25 parts of deionized water; weigh 15 parts of magnesium nitrate hexahydrate and 10 parts of aluminum nitrate nonahydrate and dissolve it in 50 parts of deionized water. Under vigorous stirring, the above two solutions were added dropwise into the reaction kettle at 80°C at the same time, and the pH value was kept at about 10. After the dropwise addition, it was aged for 24 h. The product was filtered and washed to obtain a magnesium aluminum hydroxide hydrotalcite sol with a solid content of 16.7% intercalated in situ with alanine.

[0051] Weigh 1.50 parts of hydrotalcite sol synthesized above and dilute to 25 parts with deionized water to form a modified hydrotalcite dispersion; in addition, dissolve 0.025 parts of polyethyleneimine in 150 parts of deionized water . Mix the above polyethyleneimine aqueous solution with the modified hydrotalcite dispersion, and disperse through an emulsifying ...

Embodiment 2

[0055] Weigh 1.5 parts of lysine and 1 part of sodium hydroxide and dissolve them in 25 parts of deionized water; weigh 15 parts of magnesium nitrate hexahydrate and 10 parts of aluminum nitrate nonahydrate and dissolve them in 50 parts of deionized water. Under vigorous stirring, the above two solutions were added dropwise into the reaction kettle at 80°C at the same time, and the pH value was kept at about 10. After the dropwise addition, it was aged for 24 h. The product was filtered and washed to obtain magnesium aluminum hydroxide hydrotalcite sol with a solid content of 15.2% in situ intercalation of lysine.

[0056] Weigh 3.3 parts of hydrotalcite sol synthesized above and dilute to 100 parts with deionized water to form a modified hydrotalcite dispersion; in addition, dissolve 0.25 parts of polyethyleneimine in 125 parts of deionized water . Mix the above polyethyleneimine aqueous solution with the modified hydrotalcite dispersion, and disperse through an emulsifying...

Embodiment 3

[0060] Weigh 1.5 parts of lysine and 1 part of sodium hydroxide and dissolve them in 25 parts of deionized water; weigh 15 parts of magnesium nitrate hexahydrate and 10 parts of aluminum nitrate nonahydrate and dissolve them in 50 parts of deionized water. Under vigorous stirring, the above two solutions were added dropwise into the reaction kettle at 80°C at the same time, and the pH value was kept at about 10. After the dropwise addition, it was aged for 24 h. The product was filtered and washed to obtain magnesium aluminum hydroxide hydrotalcite sol with a solid content of 15.2% in situ intercalation of lysine.

[0061] Weigh 1.65 parts of hydrotalcite sol synthesized above and dilute to 50 parts with deionized water to form a modified hydrotalcite dispersion; in addition, dissolve 0.75 parts of polyethyleneimine in 125 parts of deionized water . Mix the above polyethyleneimine aqueous solution with the modified hydrotalcite dispersion, and disperse through an emulsifying...

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PUM

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Abstract

The invention relates to a modified hydrotalcite stabilized AKD (Alkyl Ketene Dimer) emulsion sizing agent and a preparation method thereof, and belongs to the technical field of emulsification of papermaking sizing agents. The modified hydrotalcite stabilized AKD emulsion sizing agent provided by the invention consists of a water phase consisting of hydrotalcite in-situ intercalation of amino acids and polyethyleneimine and AKD. The technical problem that hydrotalcite cannot be used for emulsifying stabilized AKD is solved, and a novel emulsified stabilizing manner is provided for obtaining the AKD emulsion sizing agent. The AKD emulsion sizing agent stabilized by the hydrotalcite in-situ intercalation of amino acids and polyethyleneimine in a combined manner is good in dispersibility and stability and high in sizing efficiency. The AKD emulsion sizing agent not only can be used as an internal sizing agent, but also can be used as a surface sizing agent, and the use level is less. The AKD emulsion sizing agent can be used for improving the water resistance of paper and paperboards to a great extent, and has the advantages of good sizing effect and fast curing speed.

Description

Technical field [0001] The present invention involves an AKD emulsion glue application method and its preparation method with a stable water slippery stone, which belongs to the field of papermaking agent emulsification technology. Background technique [0002] AKD is the abbreviation of alkylthone diodes. As a reactive medium alkaline glue agent, it has high glue efficiency, good compatibility with calcium carbonate fillers, suitable for re -application, and the edge of the cardboard to control the cardboard.The penetration is particularly effective and other advantages, which have been widely used in papermaking. [0003] Because AKD is solid at room temperature and is insoluble in water, it needs to be prepared by melting and emulsification into an emulsion -type glue.Traditional AKD emulsion uses cationic starch as emulsifier and stabilizer, but this emulsion has a low rate on the fiber, the response to the fiber is slow, and the maturity time is long.Use synthetic cations po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16
Inventor 李国栋刘温霞王慧丽于得海赵奇
Owner QILU UNIV OF TECH