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Method for preparing ASA paper-making sizing agent emulsion

A sizing agent and emulsion technology, which is applied in the field of preparation of ASA paper sizing agent emulsion, can solve the problems of unfavorable emulsion storage, low concentration of ASA emulsion, and large amount of particle components added, so as to achieve less dosage and low emulsification cost , High sizing efficiency

Inactive Publication Date: 2008-12-31
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adverse effects brought by the surfactant cannot be completely avoided, and the addition of the particle component is too large, and the concentration of the prepared ASA emulsion is very low, which is not conducive to the storage of the emulsion.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of emulsifier: 0.75 part of sodium fluoride modified bentonite, 0.1 part of the interlayer anion as Cl - The ionic synthetic hydrotalcite was dispersed in 40 parts of water to prepare an ASA emulsifier, and the solid content of the emulsifier was 2.08%.

[0019] Emulsification of ASA: Weigh 20 parts of the industrial product ASA, add the emulsifier prepared above into the oily ASA, keep the oil-water ratio 1:2, and use high-speed stirring equipment to stir and emulsify at 5000r / min for 5 minutes. The prepared ASA emulsion is a uniform milky white oil-in-water (O / W) emulsion, the pH of the emulsion is 5.31, the viscosity is 0.165 Pa s, the average particle size of the emulsion is 1-3 μm, and the emulsion is centrifuged in a centrifuge (3000r / min) for 10min No change, no phase precipitation, no demulsification phenomenon, and no obvious change in the emulsion after 72 hours.

[0020] In-pulp sizing effect: Take 100 parts of hardwood pulp and disperse in 9900 ...

Embodiment 2

[0022] Preparation of emulsifier: 1.5 parts of sodium fluoride modified bentonite, 0.01 parts of sodium interlayer anion as Cl - Ionic hydrotalcite was dispersed in 40 parts of water to prepare ASA emulsifier, and the solid content of the emulsifier was 7%.

[0023]Emulsification of ASA: Weigh 20 parts of commercial ASA, add the emulsifier prepared above into the oily ASA, keep the oil-water ratio 1:2, and use a high-speed stirring device to shear and emulsify at 8000r / min for 5min. The prepared ASA emulsion is a uniform milky white O / W emulsion, the pH of the emulsion is 4.31, the viscosity is 0.081Pa·s, the average particle size of the emulsion is 1-2.5μm, and the emulsion has no obvious change after 48 hours.

[0024] In-pulp sizing effect: Take 100 parts of hardwood pulp and disperse it in 9900 parts of water. After the dispersion is uniform, add 2 parts of the above-mentioned ASA emulsion and 1 part of Al 2 (SO 4 ) 3 , mixed evenly to form a paper stock, and copied by ...

Embodiment 3

[0026] Preparation of emulsifier: 4 parts of sodium fluoride modified bentonite, 0.02 part of the interlayer anion as Cl - The ionic synthetic hydrotalcite was dispersed in 80 parts of water to prepare ASA emulsifier, and the solid content of the emulsifier was 2.5%.

[0027] Emulsification of ASA: Weigh 20 parts of the industrial product ASA, add the emulsifier prepared above into the oily ASA, keep the oil-water ratio 1:4, and use a high-speed stirring device to emulsify at 10000r / min for 3min. The prepared ASA emulsion is a uniform milky white oil-in-water (O / W) emulsion, the pH of the emulsion is 5.13, the viscosity is 0.265Pa·s, the average particle size of the emulsion is 1-2μm, and the emulsion has no obvious change after 48 hours.

[0028] 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 the above-mentioned ASA emulsion, 1 part of Al 2 (SO 4 ) 3 , mixed evenly to form a paper ...

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Abstract

The invention relates to a process for preparing an emulsion of ASA paper sizing agent, comprising the following steps of: (1) mixing and then dispersing inorganic nano-particles with positive charges and inorganic nano-particles with negative charges to form a water phase; (2) mixing oily ASA with the water phase to form an oil-water mixture; and (3) cutting and emulsifying the mixture by a high-speed mixing device to obtain an ASA emulsion. Wherein, the oil-water mixture ratio is 1: 4 to 1:1, particles with negative charges and ASA are in a ratio of 1:30 to 1:5, and particles with positive charges and particles with negative charges are in a ratio of 1:150 to 1:7.5. The preparation process has advantages of simple emulsification process, having no need of surface active agent and complex polyelectrolyte particles for emulsifying the ASA into stable emulsion, low emulsifying agent consumption, low emulsification cost, and high concentration, good stability and high sizing efficiency of the prepared emulsion.

Description

technical field [0001] The invention relates to a preparation method of an ASA papermaking sizing agent emulsion. In more detail, it is a method for preparing a stable ASA papermaking sizing agent emulsion by using the micro-floccules of anion and cation inorganic nanoparticles as an emulsifying and stabilizing agent. Background technique [0002] The transformation of the papermaking industry from acidic papermaking system to medium and alkaline papermaking is an innovative change in the papermaking process in the 20th century. This can not only improve the quality of paper and expand the range of fillers, but also reduce pulp consumption, reduce energy consumption, and reduce environmental pollution. Extend the life of equipment. According to statistics, in the early 1980s in Europe, cultural paper produced by medium and alkaline sizing accounted for 60% to 65% of the total cultural paper, and it reached 95% in the 1990s. Alkaline sizing ratio jumped from 15% to over 90%...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16
Inventor 刘温霞于得海田鹏飞
Owner QILU UNIV OF TECH
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