A preparation method of papermaking sizing agent emulsified by flake solid particles

A technology of solid particles and sizing agent, applied in the direction of adding water repellents, etc., can solve the problems of low ASA emulsion concentration, large amount of particle components added, unfavorable emulsion storage, etc., achieving low emulsification cost, improving sizing performance, Low dosage effect

Inactive Publication Date: 2016-01-06
SOUTH CHINA 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, the concentration of the prepared ASA emulsion is very low, which is not conducive to the storage of the emulsion, and the hydrolysis of ASA is serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The trialkoxysilane coupling agent (KH570, γ-methacryloxypropyltrimethoxysilane) and the flaky nano-bentonite solid particles with a particle size of 25nm (sodium carbonate modified sodium-based bentonite, original soil Taken from Zhejiang, provided by Zhejiang Sanding Technology Co., Ltd.) mixed by 10% mass percentage, deionized water is added to the mixture, the mass ratio of deionized water and sheet-like nano-bentonite solid particles is 10: 1, then add toluene or Absolute ethanol, the mass ratio of deionized water and flaky nano-bentonite solid particles is 30:1, heat and stir at 75°C for 6 hours, let stand and cool to room temperature to obtain a modified bentonite suspension, and then extract the resulting suspension , The solid obtained by extraction was washed repeatedly with toluene. The washed solids are dried and ground, and passed through a 200-mesh sieve, and the resulting sieve residue (not the residue in the sieve) is dispersed in deionized water (resist...

Embodiment 2

[0024] Trialkoxysilane coupling agent (KH550, γ-chloropropyltriethoxysilane) and flaky nano-bentonite solid particles with a particle size of 50nm (calcium carbonate modified calcium-based bentonite, the original soil was taken from Zhejiang, Provided by Zhejiang Sanding Technology Co., Ltd.) by 5% mass percentage, add deionized water to the mixture, the amount of deionized water relative to the mass ratio of bentonite solid particles is 20:1, then add toluene or absolute ethanol, the amount The mass ratio relative to the bentonite solid particles is 60:1, heated and stirred at 75°C for 8 hours, allowed to stand and cooled to room temperature to obtain a modified bentonite suspension, and then extract the obtained suspension, and extract the obtained solid with Repeated washing with toluene or ethanol. The solids after washing are dried and ground and passed through a 200-mesh sieve, and the resulting sieve residue is dispersed in deionized water and stirred evenly to obtain a...

Embodiment 3

[0028] The trialkoxysilane coupling agent (KH560, γ-glycidyl etheroxypropyltrimethoxysilane) and the flaky nano-bentonite with a particle size of 100nm (magnesium-based modified bentonite, the original soil was taken from Liaoning, by Chaoyang Rundong Products Sales Co., Ltd. Provided) the solid particles are mixed at a mass percentage of 2%, and deionized water is added to the mixture, the amount of deionized water relative to the mass ratio of the bentonite solid particles is 15:1, and then toluene or absolute ethanol is added, and the amount is relative to the bentonite solid particles The mass ratio of bentonite is 50:1, heated and stirred at 75°C for 5 hours, allowed to stand and cooled to room temperature to obtain a modified bentonite suspension, and then extracted the obtained suspension, and the extracted solid was repeatedly washed with toluene or ethanol . The solids after washing are dried and ground and passed through a 200-mesh sieve, and the resulting sieve resi...

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Abstract

The invention discloses a preparation method of a paper making sizing agent formed by emulsification of flaky solid particles. The method comprises the following steps of: firstly, mixing a silane coupling agent with flaky nanometer bentonite solid particles and dispersing the mixture in deionized water; secondly, adding methylbenzene or absolute ethyl alcohol to prepare modified bentonite suspension liquid; thirdly, dispersing the flaky nanometer bentonite solid particles modified by the silane coupling agent into the deionized water, stirring uniformly, and regulating the pH value to 3.5-9.5; fourthly, mixing liquid paraffin with vinyl succinic anhydride and stirring uniformly to obtain mixed sizing oil liquid; and at last mixing the sizing oil liquid with the bentonite suspension liquid, wherein the paper making sizing agent with stably emulsified flaky solid particles is obtained after the mixture is emulsified. The paper making sizing gent has quite high stability, and the preparation method is simple, can be used for emulsifying the vinyl succinic anhydride into a stable emulsion without adding any surface active agent or high-molecular polyelectrolyte, also uses little emulsifying agent, is low in emulsification cost, and causes low pollution to the environment.

Description

technical field [0001] The invention relates to a preparation method of a papermaking sizing agent, in particular to a preparation method of a high-efficiency papermaking sizing agent emulsified by flake solid particles. Background technique [0002] In recent years, the papermaking industry has changed from the acidic papermaking system to the medium-alkaline papermaking system, which is an innovative change in the papermaking process. It has greatly improved the quality of paper, expanded the range of fillers, reduced pulp consumption and energy consumption, reduced environmental pollution, and extended the use of equipment. life. In the early 1980s in Europe, the 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. The proportion jumped from 15% to over 90%. Since 1989, China has started to use medium and alkaline sizing in production, and it has been gradually popularized in recent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/16
Inventor 于得海林兆云李友明
Owner SOUTH CHINA UNIV OF TECH
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