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Quaternary ammonium salt modified hectorite emulsifier and method for emulsifying ASA (acetylsalicylic acid) by using same

A technology of quaternary ammonium salt and hectorite, which is applied in water-repellent addition, textile and papermaking, fiber raw material treatment, etc., can solve the problem of poor hydrolytic stability of ASA emulsion, poor sizing effect of ASA emulsion, and hectorite modification efficiency Low-level problems, to achieve the effect of good emulsification effect, high sizing efficiency and easy operation

Active Publication Date: 2013-12-18
山东熙来淀粉有限公司
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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 ASA emulsion or sizing effect, The invention provides a quaternary ammonium salt modified hectorite emulsifier

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 and the degree of beating 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 ...

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 and the degree of beating is about 40 oSR 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...

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 and the degree of beating 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 ...

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Abstract

The invention relates to a quaternary ammonium salt modified hectorite emulsifier and a method for emulsifying ASA (acetylsalicylic acid) by using the quaternary ammonium salt modified hectorite emulsifier and belongs to the technical field of emulsification of papermaking sizing agents. The emulsifier is composed of independently existing quaternary ammonium salt and hectorite; and the mass ratio of the quaternary ammonium salt to the hectorite is 1: (50-500). According to the quaternary ammonium salt modified hectorite emulsifier, the quaternary ammonium salt has high modification efficiency to hectorite, is small in dosage when stabilizing ASA sizing emulsion and has good emulsion effect on the stable ASA sizing emulsion; the ASA sizing emulsion stabilized by the quaternary ammonium salt modified hectorite emulsifier is good in stability, free of granular aggregation or precipitation or water phase separation after being stood still for 24 hours, is hardly hydrolyzed and is small in sizing performance change after being placed for 3 hours and high in sizing efficiency; and compared with ASA emulsion singly stabilized by hectorite, the ASA emulsion stabilized by the emulsifier has greatly improved sizing efficiency.

Description

technical field [0001] The invention relates to a quaternary ammonium salt modified hectorite emulsifier and a method for emulsifying ASA, belonging 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 emulsion before it can be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16D21H17/14
Inventor 刘温霞谭华张伟王慧丽王哲
Owner 山东熙来淀粉有限公司
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