Cation surface sizing agent and preparation method thereof

A surface sizing agent, cationic technology, applied in the direction of adding water repellent, paper, textiles and papermaking, etc., can solve the problems of complex production process and unenvironmental protection, achieve low production cost, reduce hair loss, and enhance cationic properties. Effect

Inactive Publication Date: 2011-07-13
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 modified starch and 150g of deionized water, add them to the reactor, stir well, slowly raise the temperature to 75°C, keep for 20 minutes, then add 0.008g of amylase solution and 1.5g of formic acid, and continue to keep warm;

[0058] Step 2: Pre-emulsification

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

[0060] The third step: emulsion polymerization

[0061] Weigh 10g of 27% hydrogen peroxide and dissolve it in 60g of deionized water, and dissolve 0.1g of ferrous chloride in 2g of deionized water; first add formic acid to the reactor that has been filled with starch and keep it warm ...

Embodiment 2

[0063] The first step: starch gelatinization

[0064] Weigh 26g of cationic modified starch and 150g of deionized water, add them to the reactor, stir evenly, slowly raise the temperature to 80°C, keep 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 dodecyldimethylamine oxide and dissolve it in 45g deionized water, add 58g styrene, 40g butyl acrylate, 5g acrylamide, 5g N-methylolacrylamide, 5g methacrylamide under stirring Oxyethyl trimethyl ammonium chloride, and then pre-emulsified for 40 minutes to obtain a pre-emulsified monomer mixture, that is, a pre-emulsified liquid;

[0067] The third step: emulsion polymerization

[0068] Weigh 7g of 27% hydrogen peroxide and dissolve it in 55g of deionized water, and dissolve 0.15g of ferrous chloride in 2g of deionized water; first add formic acid to the reactor and keep it warm for 10 minutes, then add 2.15g of ferrous chloride. The ...

Embodiment 3

[0070] The first step: starch gelatinization

[0071] Weigh 18g of cationic modified starch and 150g of deionized water, add them to the reactor, stir well, slowly raise the temperature to 85°C, keep 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 dodecyldimethylamine oxide and dissolve it in 45g of deionized water, add 61g of styrene, 37g of butyl acrylate, 8g of acrylamide, 8g of N-methylolacrylamide, and 5g of methacrylamide under stirring. Oxyethyl trimethyl ammonium chloride, and then pre-emulsified for 40 minutes to obtain a pre-emulsified monomer mixture, that is, a pre-emulsified liquid;

[0074] The third step: emulsion polymerization

[0075] Weigh 7g of 27% hydrogen peroxide and dissolve it in 55g of deionized water, and dissolve 0.15g of ferrous chloride in 2g of deionized water; first add formic acid to the reactor and heat it for 10 minutes and add 2.15g of ferr...

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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 used for 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 aids, and specifically 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, relatively low sizing cost, and can reduce the contamination of nets and felts, and improve the life of the nets. Improve output and paper machine operation stability, reduce equipment corrosiveness and downtime to replace spare parts and brush overhaul 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 in the printing process. It can control ink permeability, improve printing gloss and reduce "through-printing" phenomeno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/16D21H17/29D21H17/45
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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