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Preparation method of hollow polymer microspheres

A polymer and microsphere technology, which is applied in the preparation of microspheres, microcapsule preparations, coatings, etc., can solve the problems of loose compactness, and the core is not easy to form a hollow shape.

Active Publication Date: 2014-01-22
NANYA PLASTICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its disadvantages are: the former, because the core has bridges, the core is not easy to form a hollow core / shell particle during alkali swelling, and the latter is due to the loose density of the particle core / shell interface and no particles in the middle. Buffer layer, due to the effect of osmotic pressure in the subsequent alkali swelling process, alkali molecules enter the interior of the core-shell particles and neutralize the acidic core containing carboxyl groups, and at the same time the mutual repulsion between the generated ionic charges and these carboxylate groups The hydrophilicity of ions is much greater than that of carboxylic acids, which leads to the migration of molecular chains to the outer water phase of the particles, so that the particle volume further expands, but the outer shell polymer repels the increase in particle size due to hydrophobicity and bridging treatment. Large, forming two forces, internal and external, to continuously squeeze

Method used

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  • Preparation method of hollow polymer microspheres

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Embodiment approach

[0010] The preparation and structure control of the polymer microsphere emulsion of the present invention adopts the method of three-stage latex polymer, which is beneficial to control the uniformity of particle size and improve the water resistance, color rendering and gloss during printing. The three-stage latex polymer process is implemented as follows:

[0011] (1) Preparation of the core layer: The core layer is prepared by using the so-called seed emulsion polymerization. The seed emulsion polymerization mainly uses acrylic monomers, emulsifiers and water-soluble free initiators for emulsion polymerization. The acrylic acid (ester) monomers used are monomers selected from the following groups: methyl acrylate, methyl methacrylate, ethyl acrylate, butyl acrylate, butyl methacrylate, ethylhexyl acrylate, Monomethyl maleate, Monomethyl itaconate, Monomethyl fumarate, Acrylic acid, Methacrylic acid, Acryloxypropionic acid, Methacryloxypropionic acid, Acryloxyacetic acid, Met...

Embodiment 1

[0021] Prepare a monomer pre-emulsion consisting of 60 grams of deionized water, 1.5 grams of sodium dodecylbenzenesulfonate, 20 grams of methacrylic acid, 40 grams of methyl methacrylate and 280 grams of butyl acrylate, and prepare another 60 grams Deionized water and 5 grams of ammonium persulfate starter solution are set aside; 2000 grams of deionized water and 60.4 grams of monomer pre-emulsion are added to the reactor, and after the air in the reaction vessel is driven away with nitrogen, it is maintained under a nitrogen environment Stir and heat to 78°C, add the ammonium persulfate starter solution for 0.5 hours, and at the same time add the remaining monomer pre-emulsion to the reactor for 1.5 hours, keep the reaction at 78°C for 4 hours after the addition of monomers, and then cool To room temperature, filter to remove the condensate, and prepare a seed emulsion of the core layer with pH=2.3, average particle size 170nm, and solid content 13.5%.

[0022] Prepare monom...

Embodiment 2

[0025] Prepare a monomer pre-emulsion consisting of 60 grams of deionized water, 1.5 grams of sodium dodecylbenzenesulfonate, 20 grams of methacrylic acid, 40 grams of methyl methacrylate and 280 grams of butyl acrylate, and prepare another 60 grams Deionized water and 5 grams of ammonium persulfate starter solution are set aside; 2000 grams of deionized water and 60.4 grams of monomer pre-emulsion are added to the reactor, and after the air in the reaction vessel is driven away with nitrogen, it is maintained under a nitrogen environment Stir and heat to 78°C, add the ammonium persulfate starter solution for 0.5 hours, and at the same time add the remaining monomer pre-emulsion to the reactor for 1.5 hours, keep the reaction at 78°C for 4 hours after the addition of monomers, and then cool To room temperature, filter to remove the condensate, and prepare a seed emulsion of the core layer with pH=2.3, average particle size 170nm, and solid content 13.5%.

[0026] Prepare monom...

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Abstract

The invention discloses a preparation method of hollow polymer microspheres. Hollow particles with buffer layers are prepared by a three-stage reaction process; the hollow particles are complete in structure, uniform in particle diameter, applied to a plastic or a paper coating, high in gloss, whiteness and non-transparency, and have characteristics of good printing color concentration and printing water resistance.

Description

technical field [0001] The three-stage polymerization reaction process of the present invention adopts the seed emulsion polymerization method, first prepares the core layer seed emulsion, then prepares the buffer layer, and then coats the outer layer with the shell layer polymer, and finally obtains a buffer layer with a porous structure through alkali swelling hollow microspheres. Background technique [0002] The polymer microspheres prepared by the present invention have a hollow structure. At present, the preparation method of this type of polymer has been quite described in the literature and patents. The most commonly used emulsion polymerization reaction is to obtain the hollow polymer microsphere with a two-stage core / shell emulsification reaction. Microsphere emulsion, such as U.S. Patent No. 5,494,971, No. 6,252,004, in addition to improve temperature resistance, as disclosed in the Republic of China Patent I312355, when preparing hollow particles in the second st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F222/14C08F220/06C08F220/14C08F220/18C08F2/24C08F212/36C08J9/00C08J7/02B01J13/14C09D125/14C09D7/12C09D5/02C09D5/03
Inventor 冯殿润徐森煌刘智训郑旭明
Owner NANYA PLASTICS CORP
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