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ASA (acetylsalicylic acid) sizing emulsion stabilized by quaternary ammonium salt modified hectorite and preparation method thereof

A technology of sizing emulsion and quaternary ammonium salt, applied in the field of ASA sizing emulsion and its preparation, can solve the problems of poor hydrolytic stability of ASA emulsion, poor sizing effect of ASA emulsion, and low modification efficiency of hectorite, etc. Stability, good emulsifying effect, easy operation effect

Active Publication Date: 2013-12-18
辽宁兴东科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the current problems of using modified hectorite to stabilize ASA emulsion sizing agents: low modification efficiency of hectorite, poor hydrolytic stability of ASA emulsion, complicated emulsification steps or poor sizing effect of ASA emulsion, The invention provides a stable ASA sizing emulsion of quaternary ammonium salt modified hectorite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Gradually disperse 1 part of laponite powder into 150 parts of deionized water under constant stirring, and use it as the water phase directly after it is fully swollen. Take 50 parts of ASA (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 5000 rpm for 4 minutes to obtain an oil-in-water ASA emulsion. The mass percentage of ASA in the emulsion is It is about 25%, and the water phase precipitates out after the emulsion is left for 24 hours.

[0035] Take 100 parts of beating degree is about 40 o SR poplar alkaline hydrogen peroxide mechanical pulp was added to 9900 parts of water, and after being decomposed by a fiber disintegrating machine, 1 part of Al 2 (SO 4 ) 2 ?18H 2 O, mix and stir for 1 minute, add 0.4 parts of the ASA emulsion sizing agent prepared above, stir at a speed of 750 rpm for 2 minutes,...

Embodiment 2

[0038]Gradually disperse 1 part of hectorite powder into 150 parts of deionized water under constant stirring, and wait for it to fully swell for later use; dissolve 0.01 part of tetramethylammonium chloride in 50 parts of deionized water under stirring, and mix Mix the soapstone dispersion evenly as the water phase; take 50 parts of ASA (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 5000 rpm for 4 minutes to obtain a stable and uniform oil-in-water ASA emulsion. The mass percentage of ASA is about 25%, and the appearance of the emulsion does not change after standing for 24 hours.

[0039] Take 100 parts of beating degree is about 40 o SR poplar alkaline hydrogen peroxide mechanical pulp was added to 9900 parts of water, and after being decomposed by a fiber disintegrating machine, 1 part of Al 2 (SO 4 ) 2 ?1...

Embodiment 3

[0042] Gradually disperse 1 part of laponite powder into 190 parts of deionized water under constant stirring, and wait for it to fully swell for later use; dissolve 0.02 parts of tetramethylammonium bromide in 10 parts of deionized water under stirring, and mix The soapstone dispersion was mixed uniformly as the water phase; another 20 parts of ASA (octadecenyl succinic anhydride) was used as the oil phase. Add the oil phase to the above-prepared water 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 9%, and the appearance of the emulsion does not change after standing for 24 hours.

[0043] Take 100 parts of beating degree is about 40 o SR poplar alkaline hydrogen peroxide mechanical pulp was added to 9900 parts of water, and after being decomposed by a fiber disintegrating machine, 1 part of ...

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Abstract

The invention relates to ASA (acetylsalicylic acid) sizing emulsion stabilized by quaternary ammonium salt modified hectorite and a preparation method thereof and belongs to the technical field of emulsification of papermaking sizing agents. The sizing emulsion contains ASA, deionized water, quaternary ammonium salt and hectorite, wherein the mass ratio of the ASA to the deionized water is 1: (1-10), the mass ratio of the hectorite to the ASA is 1: (20-200), and the mass ratio of the quaternary ammonium salt to the hectorite is 1: (50-500). The ASA sizing emulsion is good in stability, free of granular aggregation or precipitation or water phase separation after being placed for 24 hours, is hardly hydrolyzed, is hardly changed in sizing performance change after being placed for 3 hours and has high sizing efficiency; and compared with ASA emulsion singly stabilized by hectorite, ASA emulsion singly stabilized by quaternary ammonium salt modified hectorite has the advantage that the sizing efficiency is expected to be greatly improved. Furthermore, the dosage of the quaternary ammonium salt modified hectorite is small, and no surfactant is added.

Description

technical field [0001] The invention relates to an ASA sizing emulsion stabilized by quaternary ammonium salt modified hectorite and a preparation method thereof, and belongs to the technical field of papermaking sizing agent emulsification. Background technique [0002] ASA is the abbreviation of alkenyl succinic anhydride, which is often used as an internal pulp sizing agent in the paper industry to improve the water resistance of paper. ASA has the advantages of high reactivity, wide pH range, good compatibility with aluminum salts, and non-slip paper. Compared with other reactive sizing agents such as AKD (alkyl ketene dimer), ASA has more advantages in sizing paper and cardboard containing various high-yield pulp, secondary fiber pulp and straw pulp. Therefore, its The application in the paper industry will become more and more extensive. [0003] Papermaking often uses water as the medium, and ASA is an oily liquid that needs to be emulsified into an oil-in-water...

Claims

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Application Information

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IPC IPC(8): D21H21/16
Inventor 刘温霞谭华张伟王慧丽王哲
Owner 辽宁兴东科技有限公司
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