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Thermal expansion resin powder with high dispersity and preparation method thereof

A thermal expansion and resin technology, applied in the field of resin micropowder, can solve the problems that resin micropowder is not easy to disperse, limit the industrial application of thermal expansion resin micropowder, etc.

Active Publication Date: 2012-10-24
CHANGSHA YICHUAN ELECTROMECHANICAL EQUIP TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some industrial applications require heat-expandable resin powder to be highly dispersed in water, but resin powder produced by traditional methods is not easy to achieve high dispersion in water, which limits the industrial application of heat-expandable resin powder

Method used

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  • Thermal expansion resin powder with high dispersity and preparation method thereof
  • Thermal expansion resin powder with high dispersity and preparation method thereof
  • Thermal expansion resin powder with high dispersity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The configuration of water-based material is to add 0.08 grams of sodium styrene sulfonate on the basis of the configuration of Comparative Example 1. The oil-based material of the configuration is the same as in Comparative Example 1, and other conditions such as dispersion, reaction temperature, reaction time, and material handling from the kettle are different. Change. The average particle diameter measured by the same method is 28 microns, and the maximum expansion ratio is 38 times, scanned by electron microscope at Figure 4 , the detailed comparison is in the table below.

[0035] Preparation of water system Formulated Oil Scatter, React, Handle Situations Dispersion in water Microscope observation Comparative example 1 See Comparative Example 1 see comparative example 1 see comparative example 1 turbid Partially aggregated particles suspended in water Example 1 Add 0.08 grams of sodium styrene sulfonate on the basis of ...

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PUM

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Abstract

A casing of a thermal expansion resin microsphere is formed by thermal expansion, a foaming agent is coated inside the resin microsphere which can expand when heated, and the expansion ratio of the maximum expansion is more than 5 times. Aggregation of the microspheres is the thermal expansion resin powder provided in the invention. The preparation method includes the steps that an oily material composed of at least one monomer and the foaming agent is dispersed in a water system so as to form stable oil droplets, and when the oil droplets are heated, the monomer is subjected to a polymerization reaction to form the resin microsphere coated with the foaming agent. The synthetic thermal expansion resin powder after addition of polar-end-containing monomer into the water system has a quite good dispersity in water.

Description

technical field [0001] The invention relates to a resin micropowder coated with a foaming agent by a polymer, and the resin micropowder expands when heated to a certain temperature. The resin micropowder of the invention is widely used in the fields of explosive sensitization, material filling, foaming agent and the like. Background technique [0002] Heat-expandable resin powder can also be called heat-expandable microspheres, heat-expandable capsules, heat-expandable hollow microspheres, heat-expandable resin particles, etc. In the 1970s, foreign countries did a lot of technical development of this type of product and realized industrial applications. The main uses include foaming agent, lightweight filler, explosive sensitizer, etc. [0003] Thermally expandable resin powder is a structure in which a polymer shell wraps a foaming agent. When heated to a certain temperature, the shell softens, and the internal foaming agent vaporizes. The gas acts on the shell to continuo...

Claims

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Application Information

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IPC IPC(8): C08F220/44C08F220/14C08F222/20C08F212/14C08F2/20C08F6/24C08J9/20
Inventor 唐世灵肖国夏文龙刘厚平何正彭忠厚郑光丕肖钢军张曹林文珊郭昶周三举
Owner CHANGSHA YICHUAN ELECTROMECHANICAL EQUIP TECH
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