Method of manufacture of styrene-butadiene latexes

一种丁二烯、苯乙烯的技术，应用在制备苯乙烯-丁二烯乳胶领域，能够解决墨干燥速度降低等问题

Inactive Publication Date: 2006-06-14
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the adhesion is improved, the ink drying speed is reduced as the amount of air bubbles in the coating layer is reduced
This means that adhesion and ink drying speed are slightly inversely proportional to physical properties, so it is very difficult to improve both by individually adjusting the glass transition temperature of latex etc.

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0023] The preparation method of the styrene-butadiene latex according to the present invention is described in more detail as follows:

[0024] The first step is a step for initial polymerization of the core, wherein the core includes 35 to 90 parts by weight of styrene, 10 to 55 parts by weight of 1,3-butadiene, and 1 to 18 parts by weight of ethylenically unsaturated acid monomer, 0.5-15 parts by weight of vinyl cyanide monomer, 1-25 parts by weight of copolymerizable monomer and 0.1-1.0 parts by weight of chain transfer agent.

[0025] The aforementioned styrene is a substance that imparts appropriate hardness and water resistance to the copolymer. If the monomer contains less than 35 parts by weight of styrene, sufficient hardness and water resistance cannot be obtained; and if the amount of styrene exceeds 90 parts by weight, its adhesion and film-forming ability are lowered.

[0026] The above-mentioned 1,3-butadiene imparts plasticity to the copolymer. If the amount ...

Embodiment 1～9

[0043] The styrene-butadiene latex of the present invention is prepared in the following three steps:

[0044] Step 1: Nucleus Preparation Steps

[0045] The 10L pressurized reactor equipped with stirrer, thermometer, cooler and nitrogen inlet and equipped with monomer, emulsifier and continuously added polymerization initiator was replaced with nitrogen, after that, added 33 parts by weight of butadiene, 49 parts by weight Parts of styrene, 8 parts by weight of methyl methacrylate, 5 parts by weight of acrylonitrile, 5 parts by weight of itaconic acid, 6 parts by weight of sodium dodecyl diphenylsulfonate, 0.3 parts by weight of tertiary ten dialkyl mercaptan, 0.4 parts by weight of sodium bicarbonate, and 420 parts by weight of ions, and heated to 60°C. To the mixture, 0.8 parts by weight of a polymerization initiator potassium persulfate was added and mixed for about 300 minutes to complete polymerization of the seeds.

[0046] The results of measuring the above-mentioned...

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PUM

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Abstract

The invention relates to a method for preparing styrene-butadiene latex. The styrene-butadiene latex according to the present invention is characterized by excellent adhesion due to promotion of early film formation by adjusting the gel content and molecular weight of the outermost layer, and excellent adhesion due to maintenance of paper film formation. With fast ink drying speed and high air permeability. Due to its excellent mechanical and chemical stability, latex can be used very stably for paper coatings.

Description

technical field [0001] The invention relates to a method for preparing styrene-butadiene latex. More specifically, the present invention relates to a method for preparing styrene-butadiene latex, which is characterized in that the initial film is promoted during the coating process by adjusting the gel content and molecular weight of the outermost layer of the styrene-butadiene latex. The formation of the latex thus makes the adhesion of the latex excellent, and has fast ink drying speed and high air permeability by maintaining proper film formation. Due to its excellent mechanical and chemical stability, latex can be used very stably for paper coatings. Background technique [0002] Usually, by coating such as clay, calcium carbonate, aluminum hydroxide (Al(OH) 3 ), titanium oxide (TiO 2 ) and other inorganic pigments to prepare the coating layer of paper, wherein since the above-mentioned inorganic pigments do not have adhesion, natural adhesives such as casein, starch,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/02C08F236/10C08F257/02C08F279/02C08F279/04C08L51/04C08L55/02C09D151/00C09D151/04C09D155/02C09J151/04C09J155/02D21H19/58
CPCC08F236/10C08F257/02C08F279/02C08F279/04C08L51/04C08L55/02C09D151/04C09D155/02C09J151/04C09J155/02D21H19/58C08L2666/02Y10T428/2998Y10T428/31931Y10T428/31895C09D151/00C08F2/38C08J3/02
Inventor 崔浩烈余承旭梁承勋韩章善
Owner LG CHEM LTD
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