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A kind of hollow polymer microparticle and its preparation method and application

A technology of polymers and microparticles, applied in textiles and papermaking, pigmented coatings, coatings, etc., can solve the problems of low acid value, low porosity, and cumbersome preparation process of seed particles, and achieve good opacity and high whiteness , good white gloss effect

Active Publication Date: 2016-03-09
南京毕汉特威高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of this method is cumbersome, and the acid value of the core polymer seed particles is low. During the alkali neutralization and swelling process, the hollow part will remain insoluble polymer, resulting in low porosity, which in turn affects the optical properties of the hollow microspheres.

Method used

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  • A kind of hollow polymer microparticle and its preparation method and application
  • A kind of hollow polymer microparticle and its preparation method and application
  • A kind of hollow polymer microparticle and its preparation method and application

Examples

Experimental program
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Embodiment 1

[0059] (1) Add 503.0g deionized water and 20g isopropanol to a 1000ml round-bottom four-neck flask equipped with a stirring paddle, a thermometer, a nitrogen inlet valve and a reflux condenser, raise the temperature to 85°C, and add 2.5% persulfuric acid in turn Ammonium aqueous solution 20g, monomer aqueous dispersion A (by mixing 35g deionized water, 2.0g polyoxyethylene alkyl ether sulfate (trade name: LATEMULE-118B, EO number is 18, 26%), 18.5g of formazan methyl acrylate, 1.0g of butyl acrylate and 10.5g of methacrylic acid), added dropwise for 30min, after the dropwise addition, rinse the emulsification tank A and the pipeline with 5.0g of deionized water, and return the emulsification tank A to the reactor after the insulation Add dropwise monomer aqueous dispersion B (by mixing 35.0g deionized water, 0.5g polyoxyethylene alkyl ether sulfate (trade name: LATEMULE-118B, EO number is 18, 26%), add while stirring 24.0g of methyl methacrylate, 5.1g of butyl acrylate, and 0....

Embodiment 2

[0062] (1) Add 503.0g deionized water and 20g isopropanol to a 1000ml round-bottomed four-neck flask equipped with a stirring paddle, a thermometer, an air inlet valve and a reflux condenser, raise the temperature to 85°C, and add 2.5% persulfuric acid in turn Ammonium aqueous solution 20g, monomer aqueous dispersion A (by mixing 35g deionized water, 2.9g polyoxyethylene alkyl ether sulfate (trade name: LATEMULE-118B, EO number is 18, 26%), 14.2g of formazan methyl acrylate, 0.8g of butyl acrylate and 15.0g of methacrylic acid), added dropwise for 30min, after the dropwise addition, rinse the emulsification tank A and the pipeline with 5.0g of deionized water, and then add Add 20g of 2.5% ammonium persulfate aqueous solution, and dropwise add monomer aqueous dispersion B (by mixing 30.0g deionized water, add 26.0g of methyl methacrylate, 1.6g of butyl acrylate and 2.4g of methacrylic acid), after 30 minutes of dripping, the temperature was raised to 85°C and kept for 1 hour to...

Embodiment 3

[0065](1) Add 517.7g of deionized water and 5.3g of isopropanol to a 1000ml round-bottom four-necked flask equipped with a stirring paddle, a thermometer, a nitrogen inlet valve and a reflux condenser, raise the temperature to 85°C, and add 6.0% of Potassium sulfate aqueous solution 20g, monomer aqueous dispersion A (by mixing 20g deionized water, 0.8g polyoxyethylene alkyl ether sulfate (trade name: LATEMULE-118B, EO number is 18, 26%), 12.3g Methyl methacrylate, 0.7g of butyl acrylate and 7.0g of methacrylic acid), dropwise for 30min, after the dropwise addition, rinse the emulsification tank A and the pipeline with 5.0g of deionized water, keep warm for 40min, and then Add 6.0% ammonium persulfate aqueous solution 20g in the reactor, and dropwise add monomer aqueous dispersion B (by mixing 40.0g deionized water, 2.2g polyoxyethylene alkyl ether sulfate (trade name: LATEMULE-118B, The number of EO is 18, 26%), which is prepared by adding 32.0g of methyl methacrylate, 6.8g of...

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Abstract

The invention discloses hollow polymer microparticles, and a preparation method and application thereof. The method comprises the following steps: in a mixed dispersion medium of deionized water and micromolecule organic alcohol, adding unsaturated monomer containing acid functional groups and other polymerizable unsaturated monomer mixed emulsified dispersion solutions into a polymerization system in the presence of an initiator, and adding a mixed monomer emulsified dispersion solution for the first time to perform semicontinuous emulsion polymerization, thereby preparing a first-stage polymer microparticle emulsion; and by using the first-stage polymer microparticle emulsion as a seed and aromatic vinyl monomer as the main monomer, carrying out copolymerization on the seed particle surface to form a coated shell polymer, and adding volatile alkali until the pH value of the polymerization system is higher than 7, thereby obtaining the hollow polymer microparticles. When being applied to coated paper, the obtained hollow polymer microparticles can provide excellent whiteness, high glossiness and light weight of paper; and when being added into paper pulp, the hollow polymer microparticles can provide excellent opacity.

Description

technical field [0001] The invention relates to a hollow polymer microparticle with large particle diameter and high porosity and a method for efficiently preparing the hollow polymer microparticle. Specifically, the present invention provides a technical process for preparing hollow polymer microparticles with large particle diameter and high porosity. Background technique [0002] Organic hollow microparticles have the characteristics of low density, special optical properties and the ability to accommodate guest molecules due to their internal cavity structure. Therefore, they are widely used in many fields such as coatings, papermaking, thermal insulation materials, optical film materials, biomedicine, and aerospace industries. Wide range of applications. [0003] In recent years, in order to realize the lightweight of coated paper, improve the whiteness and gloss of paper, and improve the opacity of newsprint and dictionaries that need to be printed on both sides, it i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F220/14C08F220/18C08F220/06C08F212/10C08F220/46C08F2/30C08F2/26D21H19/58D21H19/54D21H19/40D21H19/38
Inventor 刘祥
Owner 南京毕汉特威高分子材料有限公司