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Core-shell emulsion with controllable mattness, preparation method and application thereof

A core-shell emulsion and core-shell technology, applied in the coating and other directions, can solve the problems of affecting the leveling and viscosity stability of matte varnishes, easy to produce streaks in printed products, and short storage time, etc., to achieve operability. Stable, strong printing adaptability and long storage time

Active Publication Date: 2016-01-20
广东天龙油墨有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above two methods have great disadvantages: the former has great difficulty in material selection, and if the material is not well selected, the prepared emulsion will be layered quickly, and printed products are prone to streaks; the latter is due to the addition of Matting powder, the storage time is short, it can not meet the requirements of long-distance transportation and storage, and it is easy to produce matting powder during printing and glazing, which will be deposited due to gravity and block the printing plate
In order to adjust the degree of matteness, it is mainly by adjusting the proportion of matting powder added. In order to obtain a product with better matte effect, generally a higher proportion of matting powder is added, and an excessively high proportion of matting powder will also affect the matte varnish. Excellent leveling and viscosity stability

Method used

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  • Core-shell emulsion with controllable mattness, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 1458 grams of deionized water and 6 grams of water-soluble initiator ammonium persulfate into a four-neck flask equipped with a thermometer, a reflux condenser, a dropping device, and stirring, and raise the temperature to 83°C. Add 500 grams of deionized water, 6 grams of reactive emulsifier sodium acrylamido isopropyl sulfonate, 150 grams of acrylamide, 170 grams of N-methylol acrylamide, 40 grams of methacrylic acid, methacrylic acid 50 grams of methyl ester, 50 grams of styrene, and 20 grams of molecular weight regulator 3-mercaptopropanol were pre-emulsified. Add the pre-emulsified mixed monomers dropwise into the flask by "starvation method" within the temperature range of 80°C to 85°C, and the dropwise addition time is 90 minutes. After the dropwise addition, 38 grams of ammonia water was added to adjust the pH value of the emulsion to 8.5, and the emulsion was kept for 30 minutes to prepare the shell emulsion.

[0038] Dissolve 12 grams of ammonium persulfa...

Embodiment 2

[0040] Add 1146 grams of deionized water and 8 grams of water-soluble initiator ammonium persulfate into a four-neck flask equipped with a thermometer, a reflux condenser, a dropping device, and stirring, and raise the temperature to 83°C. Add 500 grams of deionized water, 10 grams of reactive emulsifier containing allyl-containing special alcohol ether sulfate, 248 grams of acrylamide, and 72 grams of N-methylol acrylamide in the head tank (the effective content accounts for 1% of the total amount of monomers). 7.5%), 40 grams of methacrylic acid, 50 grams of methyl methacrylate, 50 grams of styrene, and 20 grams of molecular weight modifier tertiary dodecyl mercaptan are pre-emulsified. Add the pre-emulsified mixed monomers dropwise into the flask by "starvation method" within the temperature range of 80°C to 85°C, and the dropwise addition time is 90 minutes. After the dropwise addition, 50 g of monoethanolamine was added to adjust the pH of the emulsion to 8.5, and the emu...

Embodiment 3

[0043] Add 1171 grams of deionized water and 8 grams of water-soluble initiator ammonium persulfate into a four-neck flask equipped with a thermometer, a reflux condenser, a dropping device, and stirring, and raise the temperature to 83°C. Add 500 grams of deionized water, 10 grams of alcohol ether sulfosuccinate sodium salt containing double bonds, 176 grams of acrylamide, and 144 grams of N-methylol acrylamide (effective content accounts for 15% of the total amount), 40 grams of methacrylic acid, 50 grams of methyl methacrylate, 50 grams of styrene, and 20 grams of molecular weight modifier n-dodecyl mercaptan acetate are pre-emulsified. Add the pre-emulsified mixed monomers dropwise into the flask by "starvation method" within the temperature range of 80°C to 85°C, and the dropwise addition time is 90 minutes. After the dropwise addition, 25 grams of diethanolamine was added to adjust the pH of the emulsion to 8.5, and the emulsion was kept for 30 minutes to prepare the she...

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Abstract

The invention relates to the technical field of water-base varnish and discloses matte degree controllable core-shell emulsion as well as a preparation method and application thereof to water-base matte varnish. The matte degree controllable core-shell emulsion comprises a vinyl monomer, an initiator, a molecular weight modifier, a reactive emulsifier, a pH modifier and deionized water. The matte emulsion with different matte degrees can be obtained by changing the amount of N-hydroxymethyl acrylamide in the shell vinyl monomer, has long storage time and good weather resistance and water resistance and dispenses with matting agents. The water-base matte varnish prepared from the matte degree controllable core-shell emulsion has the advantages of long storage time, good stability, good printing adaptability and the like.

Description

technical field [0001] The invention relates to the technical field of water-based varnish, in particular to a core-shell emulsion with controllable matt degree, a preparation method thereof and an application in water-based matte varnish. Background technique [0002] With the rapid and steady development of the market economy and the commodity economy, people pay more and more attention to the printing and decoration of food packaging, books, magazine covers, calendars, pictures, medicine boxes, cigarette packs, etc., not only require the printing of exquisite color pictures, And hope to have a magnificent surface gloss. This glossiness is the special effect produced by coating varnish on the printed matter. [0003] The coating and glazing market is a diversified market. Food printing plants, book printing plants, commercial printing plants, trademark printing plants and folding carton printing plants all have varying degrees of glazing requirements for various packaging...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F220/18C08F220/58C08F220/56C08F220/06C08F220/14C08F222/40C09D125/14C09D7/12
Inventor 黄光海王大田余中华艾平科
Owner 广东天龙油墨有限公司
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