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High-performance sizing agent emulsion and preparation method thereof

A sizing agent and high-performance technology, which is applied in the direction of water-repellent agent addition, textile and papermaking, fiber raw material treatment, etc., can solve the problem of large amount of sizing agent, achieve the effect of improving hydrophobicity and reducing Cobb value

Active Publication Date: 2013-08-21
SHANGHAI DONGSHENG NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent CN200710150369.0 discloses a method for obtaining a sizing agent emulsion by using a cationic polymer emulsified sizing agent graft-polymerized with a natural polymer. larger

Method used

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  • High-performance sizing agent emulsion and preparation method thereof
  • High-performance sizing agent emulsion and preparation method thereof
  • High-performance sizing agent emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Synthesis of cationic polymers:

[0030] a) 0.3g potassium persulfate is dissolved in 10g deionized water to be dissolved into an aqueous initiator solution, for subsequent use; 0.5g potassium permanganate is dissolved in 1.17g deionized water to be dissolved into an aqueous solution of potassium permanganate;

[0031] b) Add 100g of hydroxyethyl cellulose and 300g of deionized water into a 1000ml four-neck flask, dissolve, and heat up to 60°C;

[0032] c) At 60°C, add the potassium permanganate aqueous solution in step a) into a four-necked flask, and keep it warm at 60°C for 1 hour; adjust the pH to 3.05 with 1 g of sulfuric acid.

[0033] d) Heating up to 70°C again, quickly adding 2.06g of initiator aqueous solution into a four-necked flask, and incubating at 70°C for 10 minutes; at the same time, dropwise adding 10g of dimethyl diallyl ammonium chloride and the remaining amount of initiator aqueous solution, dropwise The adding time is 1 hour; then 1 g of vinyltri...

Embodiment 2

[0040] Synthesis of cationic polymers:

[0041] a) 3g sodium persulfate is dissolved in 10g deionized water to be dissolved into initiator aqueous solution, for subsequent use; 2g potassium permanganate is dissolved in 8g deionized water to be dissolved into potassium permanganate aqueous solution;

[0042] b) Add 100g carboxymethylcellulose and 400g deionized water into a 1000ml four-neck flask, dissolve, and heat up to 70°C;

[0043] c) At 70°C, add the potassium permanganate aqueous solution in step a) into a four-necked flask, and keep it warm at 70°C for 3 hours; use 0.1 g of sulfuric acid to adjust the pH to 4.95.

[0044] d) Heating up to 90°C again, quickly adding 3.9g of the initiator aqueous solution into the four-necked flask, and incubating at 90°C for 5 minutes; at the same time, dropwise adding 30g of methacrylic acid acyloxyethyltrimethylammonium chloride and the remaining amount of the initiator The aqueous solution was added dropwise for 3 hours; then 3 g of ...

Embodiment 3

[0051] Synthesis of cationic polymers:

[0052] a) 2g ammonium persulfate is dissolved in 10g deionized water to be dissolved into an aqueous initiator solution, for subsequent use; 1g potassium permanganate is dissolved in 1.5g deionized water to be dissolved into an aqueous solution of potassium permanganate;

[0053]b) Add 100g carboxymethylcellulose and 150g deionized water into a 1000ml four-neck flask, dissolve, and heat up to 65°C;

[0054] c) At 65°C, add the potassium permanganate aqueous solution in step a) into a four-necked flask, and keep it warm at 65°C for 2 hours; adjust the pH to 4.18 with 0.5 g of sulfuric acid.

[0055] d) Heating up to 80°C again, quickly adding 3g of the initiator aqueous solution into the four-necked flask, and incubating at 80°C for 8 minutes; at the same time, dropwise adding 20g of methacrylic acid acyloxyethyltrimethylammonium chloride and the remaining amount of the initiator aqueous solution , The dropping time was 2 hours; then 2g...

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Abstract

The invention discloses high-performance sizing agent emulsion and a preparation method thereof. The preparation method comprises the following steps of: adding molten alkyl ketene dipolymer into a mixture of cationic polymer and water, stirring and homogenizing to obtain the sizing agent emulsion, wherein the cationic polymer is a product obtained by reacting a cationic monomer, cellulose, potassium hypermanganate, silane and sulfuric acid under the action of an initiator. The sizing agent emulsion is a high-performance and environment-friendly product for papermaking coatings. The product is applied to the internal sizing of paper, so that the hydrophobicity of the paper can be improved obviously, and a Cobb value can be reduced.

Description

technical field [0001] The invention relates to a sizing agent emulsion, which is used for sizing in pulp during paper production. Background technique [0002] With the development of medium-alkaline papermaking technology, as a reactive medium-alkaline sizing agent, it has the characteristics of high sizing efficiency and low dosage, and has been widely used in papermaking. Traditional sizing agent emulsion uses cationic starch as emulsifier and stabilizer, but the retention rate of this emulsion on fiber is low, the reaction with fiber is slow, and the sizing curing time is long. In recent years, with the use of coated broken paper, deinked waste paper, and high-yield pulp, the improvement of the degree of closure of the white water cycle of the paper machine, and the use of other papermaking additives, the accumulation of disturbing anionic impurities in the wet end of the paper machine Concentrations are getting higher and higher, and they are more and more harmful to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/16D21H17/59
Inventor 施晓旦尹东华王养臣
Owner SHANGHAI DONGSHENG NEW MATERIALS
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