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Cationic styrene acrylate emulsion as well as preparation method and application thereof

A styrene-acrylic emulsion and cationic technology, applied in the direction of adding water repellents, can solve the problems of harsh papermaking environment and troublesome operation, and achieve the effects of improving water solubility, enhancing surface strength, and improving fiber adsorption and retention.

Active Publication Date: 2012-05-02
JINING MING SHENG NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the gradual increase of the proportion of secondary fibers in the raw materials for pulping and papermaking, and the increasing sealing degree of the white water cycle of the paper machine, the papermaking environment in the wet end is becoming increasingly harsh, and cationic surface sizing agents are increasingly favored by people. Currently, factories use weak Anionic styrene-acrylic surface sizing agent is a surface sizing agent specially designed to improve water resistance. During use, aluminum sulfate needs to be added to increase the retention rate of the surface sizing agent, and the operation is troublesome.

Method used

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  • Cationic styrene acrylate emulsion as well as preparation method and application thereof
  • Cationic styrene acrylate emulsion as well as preparation method and application thereof
  • Cationic styrene acrylate emulsion as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Synthesis of cationic styrene-acrylic emulsion:

[0031] a) Mix 25g of n-butyl acrylate, 70g of styrene and 5g of acrylic acid to make a mixed monomer. spare.

[0032] b) Dissolve 0.07 g of ethylene glycol fatty acid ester, 0.05 g of polyethylene oxide (20) sorbitan monooleate (Tween 80), and 0.1 g of potassium persulfate in 10 g of deionized water. spare.

[0033] c) Dissolve 0.6 g of p-vinylbenzyltrimethylammonium chloride in 20 deionized water and set aside.

[0034] d) Add 0.4g ethylene glycol fatty acid ester, 0.1g polyethylene oxide (20) sorbitan monooleate (Tween 80), 0.2g potassium persulfate and 50g Dissolve in deionized water to form an aqueous solution and stir for 30 minutes. spare.

[0035] e) Add 0.05g ethylene glycol fatty acid ester, 0.05g polyoxyethylene (20) sorbitan monooleate (Tween 80), 0.1g potassium persulfate and 23.6 In the aqueous solution of g deionized water, react at 70 for 40 minutes, then drop the mixed solution in d) step for 3 hour...

Embodiment 2

[0038] Synthesis of cationic styrene-acrylic emulsion:

[0039] a) Mix 50g of n-butyl acrylate, 45g of styrene and 5g of acrylic acid to make a mixed monomer. spare.

[0040] b) 0.25 g of sorbitan trioleate, 0.2 g of polyoxyethylene (20) sorbitan monooleate (Tween 80), and 0.4 g of potassium persulfate were dissolved in 45 g of deionized water. spare.

[0041] c) Dissolve 0.5 g of p-methylbenzyltrimethylammonium chloride in 20 deionized water. spare.

[0042] d) Add 0.4g sorbitan trioleate, 0.1g polyoxyethylene (20) sorbitan monooleate (Tween 80), 0.2g potassium persulfate to the mixed monomer in step 80ga) and 50g of deionized water were dissolved into an aqueous solution and stirred for 30 minutes. spare.

[0043] e) Add 0.05g sorbitan trioleate, 0.05g polyoxyethylene (20) sorbitan monooleate (Tween 80), 0.1g potassium persulfate to the mixed monomers in the 20ga) step And in the aqueous solution of 23.6g deionized water, react 40 minutes under 70 pieces, then dropwis...

Embodiment 3

[0046] Synthesis of cationic styrene-acrylic emulsion:

[0047] a) Mix 25g of methyl acrylate, 70g of styrene and 5g of methacrylic acid to make a mixed monomer. spare.

[0048] b) 0.07g of polyoxypropylene stearate, 0.05g of polyoxyethylene (20) sorbitan monostearate (Tween 60), and 0.1g of potassium persulfate were dissolved in 10g of deionized water. spare.

[0049] c) Dissolve 0.7 g of p-methylbenzyltrimethylammonium chloride in 20°C deionized water. spare.

[0050] d) Add 0.4g polyoxypropylene stearate, 0.1g polyoxyethylene (20) sorbitan monostearate (Tween 60), 0.2g sodium persulfate to the mixed monomer in step 80ga) and 50g of deionized water were dissolved into an aqueous solution and stirred for 30 minutes. spare.

[0051]e) Add 0.05g polyoxypropylene stearate, 0.05g polyoxyethylene (20) sorbitan monostearate (Tween 60), 0.1g sodium persulfate to the mixed monomer in the 20ga) step And in the aqueous solution of 23.6g deionized water, react 40 minutes under 70...

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Abstract

The invention discloses a cationic styrene acrylate emulsion as well as a preparation method and application thereof. The preparation method comprises the following steps: (a) mixing (methallyl) acrylate, (methallyl) styrene and (methallyl) acrylic acid to obtain a mixed monomer a; (b) mixing emulsifier, initiator and water to obtain an aqueous solution b; (c) mixing a cationic monomer and water to obtain an aqueous solution c; (d) adding the mixed monomer a into the emulsifier, the initiator and the water to mix to obtain a mixed monomer solution d; and (e) adding the mixed monomer a into the emulsifier, the initiator and the water to react, dropwise adding the solution d, the emulsifier, the aqueous solution b and the aqueous solution c to react, and neutralizing by using an alkaline solution to obtain a product; the cationic monomer is selected from p-vinyl-benzyl-trimethyl ammonium chloride or p-methyl-benzyl-trimethyl ammonium chloride. The adsorption and the retention of emulsion on the surface fiber of paper are improved, the surface strength of the paper is remarkably enhanced, and the Cobb value of an ash bottom whiteboard is remarkably reduced.

Description

technical field [0001] The invention relates to a cationic styrene-acrylic emulsion applied to the surface sizing of gray-bottomed white board paper. Background technique [0002] Emulsions are widely used for paper surface sizing, and the performance requirements of emulsions are getting higher and higher during the application process. With the improvement and development of emulsion application technology, the emulsion is required to have good process applicability, among which the most important thing is the cohesiveness of styrene-acrylic emulsion. The application of emulsion in paper coating can significantly improve the surface strength of paper and significantly reduce the Cobb value of gray-bottomed white board paper. [0003] With the gradual increase of the proportion of secondary fibers in the raw materials for pulping and papermaking, and the increasing sealing degree of the white water cycle of the paper machine, the papermaking environment in the wet end is b...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F220/18C08F220/14C08F220/06C08F212/14C08F2/24D21H21/16
Inventor 施晓旦李威尹东华王养臣
Owner JINING MING SHENG NEW MATERIALS CO LTD
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