Ultrasonic thermal expansion microcapsule and preparation method thereof

A technology of thermal expansion microcapsules and ultrasound, which is applied in the direction of microcapsule preparation, microsphere preparation, chemical instruments and methods, etc., can solve the problems of poor foaming uniformity, wide particle size distribution, high polymerization temperature, etc., and achieve high foaming ratio and molecular weight The effect of uniform distribution and excellent mechanical properties

Inactive Publication Date: 2020-05-08
三明市锦浪新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the known patents and products currently have shortcomings such as wide particle size distribution, high polymerization temperature, and long time. Wide particle size distribution will lead to poor foaming uniformity.

Method used

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  • Ultrasonic thermal expansion microcapsule and preparation method thereof
  • Ultrasonic thermal expansion microcapsule and preparation method thereof

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preparation example Construction

[0021] The first aspect of the present invention provides a kind of preparation method of ultrasonic thermal expansion microcapsule, at least comprises the following steps:

[0022] a) After mixing inorganic salt, suspending agent, auxiliary dispersant, polymerization inhibitor and deionized water, an aqueous phase composition is obtained;

[0023] b) After mixing low-boiling alkanes, polymerized monomers, initiators and crosslinking agents, an oil phase composition is obtained;

[0024] c) mixing the water phase composition and the oil phase composition, and preparing ultrasonic thermally expandable microcapsules through ultrasonic irradiation suspension polymerization.

[0025] In a preferred embodiment, the preparation method of the ultrasonically thermally expandable microcapsules at least includes the following steps:

[0026] a) After mixing the inorganic salt, suspending agent, auxiliary dispersant, polymerization inhibitor, and deionized water, adjust the pH to 2-3 wi...

Embodiment 1

[0103] Embodiment 1 of the present invention provides a kind of preparation method of ultrasonic thermal expansion microcapsule, comprises the following steps:

[0104] a) After mixing the inorganic salt, suspending agent, auxiliary dispersant, polymerization inhibitor, and deionized water, adjust the pH to 3 with phosphoric acid to obtain an aqueous phase composition;

[0105] b) After mixing low-boiling alkanes, polymerized monomers, initiators and crosslinking agents, an oil phase composition is obtained;

[0106] c) mixing the water phase composition and the oil phase composition, and preparing ultrasonic thermally expandable microcapsules through ultrasonic irradiation suspension polymerization.

[0107] In parts by weight, 200 parts of inorganic salts, 40 parts of suspending agents, 3 parts of auxiliary dispersants, 0.5 parts of polymerization inhibitors, 600 parts of deionized water, 40 parts of low boiling point alkanes, 200 parts of polymerization monomers, 2 parts of...

Embodiment 2

[0124] Embodiment 2 of the present invention provides a kind of preparation method of ultrasonic thermal expansion microcapsule, comprises the following steps:

[0125] a) After mixing the inorganic salt, suspending agent, auxiliary dispersant, polymerization inhibitor, and deionized water, adjust the pH to 3 with phosphoric acid to obtain an aqueous phase composition;

[0126] b) After mixing low-boiling alkanes, polymerized monomers, initiators and crosslinking agents, an oil phase composition is obtained;

[0127] c) mixing the water phase composition and the oil phase composition, and preparing ultrasonic thermally expandable microcapsules through ultrasonic irradiation suspension polymerization.

[0128] In parts by weight, 100 parts of inorganic salt, 10 parts of suspending agent, 0.05 part of auxiliary dispersant, 0.1 part of polymerization inhibitor, 200 parts of deionized water, 20 parts of low boiling point alkane, 100 parts of polymerized monomer, 0.1 part of initia...

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Abstract

The invention relates to a thermal expansion microcapsule and a preparation method thereof, specifically to an ultrasonic thermal expansion microcapsule and a preparation method thereof. The preparation method of the ultrasonic thermal expansion microcapsule at least comprises the following steps: a) mixing an inorganic salt, a suspending agent, an auxiliary dispersing agent, a polymerization inhibitor and deionized water to obtain a water-phase composition; b) mixing low-boiling-point alkane, a polymerization monomer, an initiator and a cross-linking agent to obtain an oil-phase composition;and c) mixing the water-phase composition and the oil-phase composition, and preparing the ultrasonic thermal expansion microcapsule by using an ultrasonic irradiation suspension polymerization method. A thermal expansion microcapsule shell prepared by the invention is uniform in molecular weight distribution, excellent in thermal and mechanical properties, and excellent in particle size distribution uniformity, cell uniformity, surface uniformity and temperature resistance. The ultrasonic thermal expansion microcapsule can be applied to the fields of textiles, papermaking, ink, engineering plastics and the like.

Description

technical field [0001] The invention relates to a heat-expandable microcapsule and a preparation method thereof, more specifically, the invention relates to an ultrasonic heat-expandable microcapsule and a preparation method thereof. Background technique [0002] Thermally expandable microcapsules are microcapsules formed by wrapping a low-boiling point physical blowing agent with a thermoplastic polymer shell with good gas barrier properties, and are generally formed by suspension polymerization of polymerizable monomers and blowing agents in a water-soluble dispersion system . [0003] Traditional chemical foaming methods are basically used in resin foaming to achieve lightweight and control of cell structure. However, the surface quality problem of the foamed material cannot be solved by using the chemical foaming method. Whether it is a chemical foaming system or a supercritical physical foaming system, the formation of cells depends on the diffusion of gas, and the re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14C08F220/44C08F220/14C08F222/14C09K3/00
CPCB01J13/14C08F220/44C09K3/00
Inventor 陈敬清丁友家李德福林杏江林志辉郑建南胡志宏
Owner 三明市锦浪新材料科技有限公司
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