AKD emulsion and method for producing the same

A technology of emulsion and emulsifier, applied in the field of AKD emulsion and its preparation, to improve the effect of sizing and reduce the cost of sizing

Inactive Publication Date: 2008-05-07
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Synthesis of cationic graft polymer containing chitosan, hemicellulo

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation of embodiment 1 AKD emulsion:

[0025] 1.1 Synthesis of cationic graft polymer:

[0026] At 60°C, add 10g of chitosan, 10g of hemicellulose and 10g of guar gum to an aqueous solution containing an emulsifier (Tween 80, 500mg; OP, 500mg), stir for 10min to fully dissolve it; add 5g of acrylamide, 5g methyl acrylate, 2g acryloyloxyethyl dimethyl benzyl ammonium chloride, 2g acrylamido dimethyl benzyl ammonium chloride, 3g methacryloyl oxyethyl trimethyl ammonium chloride, 2g propylene Acyloxyethyltrimethylammonium chloride, stirred for 5 minutes, and mixed evenly; added 2ml of aqueous solution containing 40 mg of ammonium cerium nitrate and 3.0 mg of V044, and reacted for 4 hours under mechanical stirring to obtain a cationic graft polymer.

[0027] 1.2 Preparation of AKD emulsion:

[0028] 100 g of AKD was melted at 60 °C; 5 g of cationic graft polymer solution was slowly added to the melted AKD under stirring. After the cationic graft polymer solution...

Embodiment 2

[0029] The preparation of embodiment 2 AKD emulsion:

[0030] 2.1 Synthesis of cationic graft polymer:

[0031] At 60°C, add 10g of chitosan, 15g of hemicellulose and 5g of guar gum to an aqueous solution containing an emulsifier (Tween 80, 300mg; OP, 700mg), stir for 10min to fully dissolve it; add 5g of acrylamide, 3g methyl acrylate, 2g acrylonitrile, 1g acryloyloxyethyl dimethyl benzyl ammonium chloride, 3g acrylamido dimethyl benzyl ammonium chloride, 3g methacryloyl oxyethyl trimethyl chloride Ammonium, 2g of acryloyloxyethyltrimethylammonium chloride, stirred for 5min, and mixed evenly; added 2ml of aqueous solution containing 20mg of ammonium cerium nitrate and 1.2mg of V044, and reacted for 4h under mechanical stirring to obtain a cationic graft polymer.

[0032] 2.2 Preparation of AKD emulsion:

[0033] 100 g of AKD was melted at 60 °C; 6 g of cationic graft polymer solution was slowly added to the melted AKD with stirring. After the cationic graft polymer solutio...

Embodiment 3

[0034] The preparation of embodiment 3 AKD emulsion:

[0035] 3.1 Synthesis of cationic graft polymer:

[0036] At 60°C, add 2g of chitosan, 15g of hemicellulose and 13g of guar gum to an emulsifier-containing aqueous solution (Tween 80, 350mg; OP, 650mg), stir for 10min to fully dissolve them; add 1g of acrylamide, 7g methyl acrylate, 2g acrylonitrile, 1g acryloyloxyethyl dimethyl benzyl ammonium chloride, 3g acrylamido dimethyl benzyl ammonium chloride, 3g methacryloyl oxyethyl trimethyl chloride Ammonium, 2g of acryloyloxyethyltrimethylammonium chloride, stirred for 5min, and mixed evenly; added 2ml of an aqueous solution containing 20mg of ammonium cerium nitrate and 1.4mg of V044, and reacted for 4h under mechanical stirring to obtain a cationic graft polymer.

[0037] 3.2 Preparation of AKD emulsion:

[0038] 100 g of AKD was melted at 60 °C; 4 g of cationic graft polymer solution was slowly added to the melted AKD with stirring. After the cationic graft polymer solut...

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PUM

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Abstract

The invention relates to an AKD emulsion and a preparation method thereof, which belongs to the Paper Chemicals field. Nonionic monomer, positive ion monomer and natural high molecular compound are used to a generate glycerol polymerization reaction for preparing positive ion polymer which is used as emulsifying agent under the effect of compound evocating agent, and then the AKD emulsion is prepared by using the method of mechanical stirring and emulsification. The AKD emulsion is used for glue blending in the slurry and on the surface of paper making, thereby improving glue blending effect and reducing glue blending cost.

Description

technical field [0001] The invention belongs to the field of papermaking chemicals, in particular to an AKD emulsion and a preparation method thereof. Background technique [0002] In the middle and late 1990s, with the localization of AKD glue, many large and medium-sized paper mills switched to AKD glue instead of rosin glue. AKD glue is a reactive sizing agent, and the curing time is relatively long, generally about ten days, which greatly increases the inventory of the manufacturer and increases the production cost. In recent years, with the use of coated broken paper, deinked waste paper, high-yield pulp, the improvement of the sealing degree of the white water cycle of the paper machine, and the use of other papermaking additives, the removal of disturbing anionic impurities in the wet end of the paper machine Agglomeration concentration is getting higher and higher, and it is more and more harmful to the wet end operation of the paper machine. At present, the most e...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F2/24
Inventor 查瑞涛王立军
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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