Cation surface sizing agent and preparation method thereof

A surface sizing agent and cationic technology, applied in the direction of water repellent addition, paper, textiles and papermaking, etc., can solve the problems of environmental protection, complicated production process, etc., achieve low production cost, increase sizing degree, and improve surface strength Effect

Inactive Publication Date: 2010-02-17
东莞市清正合成高新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is carried out in an organic solvent, and the production process is complicated and not environmentally friendly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The first step: starch gelatinization

[0057] Weigh 22g of cationic denatured starch and 150g of deionized water, add them into the reaction kettle, stir evenly, slowly raise the temperature to 75°C, keep it warm for 20 minutes, then add 0.008g of amylase solution, 1.5g of formic acid, and continue to keep warm;

[0058] Step 2: Pre-emulsification

[0059] Weigh 1g of dodecyl dimethylamine oxide and dissolve it in 53g of deionized water, add 54g of styrene, 34g of butyl acrylate, 6g of acrylamide, 6g of N-methylolacrylamide, 5g of methacryloyloxyethyl Trimethylammonium chloride, then pre-emulsified for 40 minutes to obtain a pre-emulsified monomer mixture that is a pre-emulsion;

[0060] Step 3: Emulsion Polymerization

[0061] Weigh 10g of 27% hydrogen peroxide and dissolve in 60g of deionized water, and dissolve 0.1g of ferrous chloride in 2g of deionized water; first add 2.1g of ferrous chloride to the reaction kettle filled with starch and keep it warm for 10 min...

Embodiment 2

[0063] The first step: starch gelatinization

[0064] Weigh 26g of cationic denatured starch and 150g of deionized water, add them into the reaction kettle, stir well, then slowly raise the temperature to 80°C, keep it warm for 15 minutes, then add 0.006g of amylase solution, 2g of acetic acid, and continue to keep warm;

[0065] Step 2: Pre-emulsification

[0066] Weigh 1.5g of dodecyl dimethyl amine oxide and dissolve it in 45g of deionized water, add 58g of styrene, 40g of butyl acrylate, 5g of acrylamide, 5g of N-methylolacrylamide, 5g of methacryloyl Oxyethyltrimethylammonium chloride, and then pre-emulsified for 40 minutes to obtain a pre-emulsified monomer mixture that is a pre-emulsion;

[0067] Step 3: Emulsion Polymerization

[0068] Weigh 7g of 27% hydrogen peroxide and dissolve in 55g of deionized water, and dissolve 0.15g of ferrous chloride in 2g of deionized water; first add 2.15g of ferrous chloride to the reaction kettle filled with starch, and then add form...

Embodiment 3

[0070] The first step: starch gelatinization

[0071] Weigh 18g of cationic denatured starch and 150g of deionized water, add them into the reaction kettle, stir well, then slowly raise the temperature to 85°C, keep it warm for 20 minutes, then add 0.007g of amylase solution, 1.8g of formic acid, and continue to keep warm;

[0072] Step 2: Pre-emulsification

[0073] Weigh 1.2g of dodecyl dimethyl amine oxide and dissolve it in 45g of deionized water, add 61g of styrene, 37g of butyl acrylate, 8g of acrylamide, 8g of N-methylolacrylamide, 5g of methacryloyl Oxyethyltrimethylammonium chloride, and then pre-emulsified for 40 minutes to obtain a pre-emulsified monomer mixture that is a pre-emulsion;

[0074] Step 3: Emulsion Polymerization

[0075] Weigh 7g of 27% hydrogen peroxide and dissolve in 55g of deionized water, and dissolve 0.15g of ferrous chloride in 2g of deionized water; first add 2.15g of ferrous chloride to the reaction kettle filled with starch, and then add fo...

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Abstract

The invention provides a cation surface sizing agent and preparation method thereof. Raw materials are as follows by weight percent: 8-17% of styrene, 5-15% of butyl acrylate, 0.5-5% of acrylamide, 0.5-5% of N-hydroxymethyl acrylamide, 1-5% of methyl acryloyl ethyl trimethylammonium chloride, 2-8% of starch, 0.001-0.003% of amylase, 0.2-0.7% of organic acid, 0.2-0.8% of emulsifier, 1-5% of 27% hydrogen peroxide, 0.01-0.05% of iron dichloride, the balance water. The cation surface sizing agent is prepared by starch pasting, monomer pre-emulsion and emulsion polymerization. The invention is usedfor surface sizing of paper and achieves the aim of improving physical performances of paper such as water-resistance, ring crush compression resistance, surface strength and the like.

Description

technical field [0001] The invention belongs to the field of papermaking auxiliary agents, and in particular relates to a cationic surface sizing agent and a preparation method thereof. Background technique [0002] Compared with internal sizing, surface sizing has a sizing agent retention rate close to 100%, high use efficiency, and relatively low sizing cost. It can also reduce the contamination of the net and felt, and increase the life of the net blanket. Improve output and paper machine operation stability, reduce equipment corrosion and downtime to replace spare parts and scrubbing maintenance time. Through surface sizing, the glue covers the surface of the paper and penetrates and fills the gaps between the fibers, making the surface of the paper smooth and delicate. Moreover, the adhesive film can increase the surface strength of the paper and reduce the phenomenon of lint and powder falling during the printing process. It can control the ink permeability, improve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16D21H17/45D21H17/29
Inventor 杨波董建民黄健秀崔樵夫
Owner 东莞市清正合成高新材料有限公司
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