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Preparation method of styrene-acrylic emulsion surface sizing agent

A technology of surface sizing agent and styrene-acrylic emulsion, applied in the direction of adding water repellent, can solve the problems of poor emulsion stability, late start, reduced water resistance of latex film, etc., to achieve good water resistance, improve water resistance and stability , reducing the effect of hydrophilic groups

Inactive Publication Date: 2015-06-03
HAO YU ADDITION AGENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Styrene-acrylic emulsion surface sizing agent has been rapidly developed in the paper industry due to its excellent performance. It can endow paper with many excellent properties. However, domestic research on styrene-acrylic emulsion surface sizing agent started late. The adhesive also has problems such as insufficient water resistance and insufficient stability. Therefore, it is very important to research and develop a styrene-acrylic emulsion surface sizing agent with good water resistance.
[0003] At present, domestic styrene-acrylic emulsions generally use traditional emulsifiers to synthesize emulsions. The emulsions synthesized by traditional emulsifiers have poor stability, and the residual emulsifiers will migrate or become rich during film formation. water resistance of the membrane

Method used

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Examples

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Embodiment 1

[0019] A preparation method of styrene-acrylic emulsion surface sizing agent, is characterized in that, comprises the following steps:

[0020] (1) Raw material selection:

[0021] Emulsifier: sodium acrylamide isopropyl sulfonate; monomer: styrene, butyl acrylate, methyl methacrylate, acrylic acid, N-methylol acrylamide, add 5% of the total mass of monomers when using Formaldehyde, mixed evenly; buffer: sodium bicarbonate; neutralizer: ammonia; initiator: potassium persulfate;

[0022] (2) Preparation of pre-emulsion:

[0023] Dissolve the emulsifier in deionized water, then add the monomer into it, and stir it with a magnetic stirrer to emulsify it to form a pre-emulsion;

[0024] (3) Preparation of seed emulsion:

[0025] Adjust the temperature of the water bath to 75°C, add deionized water, buffer, and emulsifier in sequence, and after fully dissolving, raise the temperature to 85°C, then add 30% total amount of initiator and 40% total amount of pre-emulsion, Keep warm...

Embodiment 2

[0031] A preparation method of styrene-acrylic emulsion surface sizing agent, is characterized in that, comprises the following steps:

[0032] (1) Selection of raw materials:

[0033] Emulsifier: sodium acrylamide isopropyl sulfonate; monomer: styrene, butyl acrylate, methyl methacrylate, acrylic acid, N-methylol acrylamide, add 5% of the total mass of monomers when using Formaldehyde, mixed evenly; buffer: sodium bicarbonate; neutralizer: ammonia; initiator: potassium persulfate;

[0034] (2) Preparation of pre-emulsion:

[0035] Dissolve the emulsifier in deionized water, then add the monomer into it, and stir it with a magnetic stirrer to emulsify it to form a pre-emulsion;

[0036] (3) Preparation of seed emulsion:

[0037] Adjust the temperature of the water bath to 80°C, add deionized water, buffer, and emulsifier in sequence, and after fully dissolving, raise the temperature to 90°C, then add a total amount of 40% of the initiator and a total amount of 50% of the pr...

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PUM

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Abstract

The invention discloses a preparation method of a styrene-acrylic emulsion surface sizing agent. The method is characterized by comprising the following steps: (1) selecting raw materials; (2) preparing a pre-emulsion; (3) preparing a seed emulsion; (4) polymerizing an outer layer; and (5) preparing a sizing liquid. A traditional emulsifier is replaced with a reactive emulsifier acrylamido isopropyl sodium sulfonate in raw material selection; the reactive emulsifier can be bonded to a polymer in a manner of a covalent bond when playing an emulsifying role, so as to become one part of the polymer; emulsifier migration in a film-forming process or desorption of the emulsifier from polymer particles is avoided; hydrophilic groups on the surface of a latex film are greatly reduced; the polymer has relatively good water-resisting property; and the water-resisting property and stability of the styrene-acrylic emulsion surface sizing agent are improved.

Description

technical field [0001] The invention relates to the technical field of surface sizing agents, in particular to a preparation method of a styrene-acrylic emulsion surface sizing agent. Background technique [0002] Surface sizing is of great significance to the paper industry. Surface sizing can improve the quality and performance of paper to meet the continuous development requirements of the current papermaking, printing and other fields. Surface sizing agent products directly affect the effect of surface sizing. good or bad. Styrene-acrylic emulsion surface sizing agent has been rapidly developed in the paper industry due to its excellent performance. It can endow paper with many excellent properties. However, domestic research on styrene-acrylic emulsion surface sizing agent started late. The glue also has problems such as insufficient water resistance and insufficient stability, so it is very important to research and develop a styrene-acrylic emulsion surface sizing ag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/18C08F220/14C08F220/06C08F220/54C08F220/58C08F2/26D21H21/16
Inventor 尹立华
Owner HAO YU ADDITION AGENT
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