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Cationic styrene-acrylic emulsion, preparation method and application thereof

A styrene-acrylic emulsion and cationic technology, which is applied in textiles and papermaking, water-repellent addition, coating, etc., can solve the problems of harsh papermaking environment and troublesome operation, and achieve the goals of improving water solubility, enhancing surface strength, and reducing Cobb value Effect

Inactive Publication Date: 2012-07-11
SHANGHAI DONGSHENG NEW MATERIALS
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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-acrylic emulsion, preparation method and application thereof
  • Cationic styrene-acrylic emulsion, preparation method and application thereof
  • Cationic styrene-acrylic emulsion, 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 (2,3) epoxypropyltrimethylammonium chloride (ETA) in 20 g of deionized water. spare.

[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 to 20g of the mixed monomer in step a), 0.05g polyoxyethylene (20) sorbitan monooleate (Tween 80), 0.1g potassium persulfate and In the aqueous solution of 23.6g deionized water, react at 70 for 40 minutes, the...

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 (2,3) epoxypropyltrimethylammonium chloride (ETA) in 50 g of deionized water. spare.

[0042] d) Add 1.2g of sorbitan trioleate, 0.8g of polyoxyethylene (20) sorbitan monooleate (Tween 80), 1.8g of potassium persulfate to the mixed monomer in the step of 80ga) and 100g of deionized water were dissolved into an aqueous solution and stirred for 30 minutes. spare.

[0043] e) Add 20 g of the mixed monomer in step a) to 1 g of sorbitan trioleate, 0.8 g of polyoxyethylene (20) sorbitan monooleate (Tween 80), 1.8 g of potassium persulfate And in the aqueous solution of 200g deionized water, react 40...

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 (2,3) epoxypropyltrimethylammonium chloride (ETA) in 20 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 20g of the mixed monomer in step a) to 0.05g polyoxypropylene stearate, 0.05g polyoxyethylene (20) sorbitan monostearate (Tween 60), 0.1g persulfuric acid In the aqueous solution of sodium and 23.6g deionized water, react at 70 ...

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Abstract

The invention discloses a cationic styrene-acrylic emulsion, and a preparation method and application of the cationic styrene-acrylic emulsion, wherein the preparation method comprises the steps of a) mixing methacrylate, methyl styrene and methacrylic acid to obtain a mixed monomer a; b) mixing an emulsifier, an initiator and water to obtain an emulsifier and initiator aqueous solution b; c) mixing a cationic monomer and water to obtain a cationic monomer aqueous solution c; d) adding the mixed monomer a to the emulsifier, the initiator and water and mixing to obtain a mixed monomer solution d; e) adding the mixed monomer a to the emulsifier, the initiator and water, allowing reaction, and then dropwise adding the mixed monomer solution d, the emulsifier and initiator aqueous solution b and the cationic monomer aqueous solution c, performing reaction; then using alkaline solution to neutralize the mixture till that pH is 7-10, and finally obtaining the product. The invention improves adsorption and retention of the emulsion on the fibers of paper surface, remarkably strengthens surface strength of the paper and notably reduces Cobb value of the coated duplex board with grey back.

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 C0bb 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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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/18C08F220/14C08F220/06C08F2/24C08F8/44D21H21/16D21H19/20
Inventor 施晓旦李威尹东华王养臣
Owner SHANGHAI DONGSHENG NEW MATERIALS
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