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Hollow polymer emulsion particle and preparation method

A technology of polymer latex and polymer emulsion, applied in the field of hollow polymer latex particles and their preparation, can solve problems such as easy rupture and collapse, achieve excellent shading performance and deformability, ensure stability and good stability Effect

Inactive Publication Date: 2014-09-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Another object of the present invention is to solve the problem of the cladding effect of the shell monomer of strong hydrophobicity and weak hydrophilicity on the core, and the solid or porous structure of the prepared polymer latex particles resulting therefrom, Problems with even hollow structures but prone to cracking and collapsing

Method used

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  • Hollow polymer emulsion particle and preparation method
  • Hollow polymer emulsion particle and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Seed emulsion preparation: Mix and stir 50g deionized water and 0.0126g anionic emulsifier SDBS, gradually heat up the deionized water and emulsifier system to 85°C, then add 0.2g initiator sodium persulfate and 0.225g methacrylic acid Add the mixture composed of 2.2g of styrene at one time, stir and mix evenly, and make a seed emulsion for use after a reaction time of 1h.

[0034]Add 120g of deionized water, 20.5g of isooctane, and 9.25g of methanol into a 1000ml round-bottom four-neck flask equipped with a stirring paddle, a thermometer, a reflux condenser, and a nitrogen inlet valve, and then add the monomer mixture in sequence (by mixing 60g of benzene ethylene, 1.2g methacrylic acid), add another 3g dodecyl mercaptan, and then under the condition of stirring, heat up until the temperature rises to 85°C, then slowly add the seed emulsion prepared above, dropwise for 1h , forming a pre-emulsion. The aqueous solution containing the initiator (made by mixing 120g of d...

Embodiment 2

[0039] Seed emulsion preparation: Mix and stir 50g deionized water and 0.0126g anionic emulsifier SDBS, gradually heat up the deionized water and emulsifier system to 85°C, then add 0.2g initiator sodium persulfate and 0.225g methacrylic acid Add the mixture composed of 2.2g of styrene at one time, stir and mix evenly, and make a seed emulsion for use after a reaction time of 1h.

[0040] Add 120g of deionized water, 29.75g of isooctane, and 9.25g of methanol into a 1000ml round-bottom four-neck flask equipped with a stirring paddle, a thermometer, a reflux condenser, and a nitrogen inlet valve, and then add the monomer mixture in sequence (by mixing 60g of benzene ethylene, 1.2g methacrylic acid), add another 3g dodecyl mercaptan, and then under the condition of stirring, heat up until the temperature rises to 85°C, then slowly add the seed emulsion prepared above, dropwise for 1h , forming a pre-emulsion. Add 50% of the total amount of the mixed solution containing the init...

Embodiment 3

[0043] Seed emulsion preparation: Mix and stir 50g deionized water and 0.0126g anionic emulsifier SDBS, gradually heat up the deionized water and emulsifier system to 80°C, then add 0.2g initiator sodium persulfate and 0.225g methacrylic acid Add the mixture composed of 2.2g of styrene at one time, stir and mix evenly, and make a seed emulsion for use after a reaction time of 1h.

[0044] Add 100g of deionized water, 29.75g of isooctane, and 12g of methanol into a 1000ml round-bottom four-neck flask equipped with a stirring paddle, a thermometer, a reflux condenser, and a nitrogen inlet valve, and then add the monomer mixture in sequence (by mixing 58g of styrene , 2.5g of methacrylic acid), add 2.5g of dodecyl mercaptan, and then heat up under stirring until the temperature rises to 85°C, then slowly add the above-prepared seed emulsion for 1h , forming a pre-emulsion. Add 50% of the total amount of the mixed solution containing the initiator (made by mixing 120g deionized w...

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Abstract

The invention discloses a hollow polymer emulsion particle and a preparation method. The method comprises the following steps: taking an acrylic acid hydrophilic unsaturated monomer and a hydrophobic unsaturated monomer as raw materials, uniformly dispersing the seed emulsion particle and a monomer in a composite system of water, inertia hydrocarbon and water-soluble alcohol, under effect of an emulsifier, a chain transferring agent and an initiator, controlling the temperature at 75-85 DEG C, performing emulsion polymerisation to obtain a polymer phase with low relative molecular mass for sealing hydrocarbon, then under effect of the emulsifier and the initiator, adding a shell monomer and crosslinking with a cross-linking agent on surface of the polymer to obtain stable shell, finally insulating, under the temperature of 80-90 DEG C, removing non-solvent hydrocarbon by vacuum pumping or gas pumping filtration, and finally acquiring the polymer emulsion particle with a core-shell hollow structure. According to the invention, due to high refractive index difference between polymer interface and air as well as particularity of the hollow structure, the hollow polymer emulsion particle has excellent shading performance and deformability.

Description

technical field [0001] The invention relates to a hollow polymer latex particle and a preparation method thereof, belonging to the field of polymer latex particle preparation. Background technique [0002] Due to the low density, high specific surface area, high refractive index difference and hollow structure of the polymer interface / air of hollow polymer latex particles, it can be applied to paper coatings, water-based coatings, leather finishes, etc. In the field of coating, it can improve the covering property, whiteness, and gloss of the coating film. At the same time, according to the difference in its hollowness, it also has potential application value in other aspects. For example, it can be used in cosmetics and biomedicine as microcapsules for encapsulation Sex additive materials, made of polymer functional materials with sustained release function. The research on hollow polymers has been one of the hot spots in the field of polymer microspheres in the past 30 ye...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F212/36C08F220/06C08F2/26C08J3/03C08L25/08
Inventor 涂伟萍邵庆辉胡剑青王锋李辉
Owner SOUTH CHINA UNIV OF TECH
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