Physical expansion foaming microsphere coated with diisopropyl azodicarboxylate and preparation method thereof

A technology for wrapping diisopropyl azodicarboxylate and diisopropyl azodicarboxylate, which is applied in the field of physically expanded foamed microspheres and its preparation, and can solve problems such as thermal runaway, poor compatibility, and danger , to improve the stability of the

Active Publication Date: 2021-01-22
ZHEJIANG UNIV OF TECH
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Diisopropyl azodicarboxylate has the following disadvantages as a liquid blowing agent: 1) Diisopropyl azodicarboxylate has a darker color, When it is used for foaming white or colorless products, it is easy to cause product dyeing; 2) Diisopropyl azodicarboxylate is a low-polarity foaming agent, when used in po

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Physical expansion foaming microsphere coated with diisopropyl azodicarboxylate and preparation method thereof
  • Physical expansion foaming microsphere coated with diisopropyl azodicarboxylate and preparation method thereof
  • Physical expansion foaming microsphere coated with diisopropyl azodicarboxylate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The raw material composition formula of microsphere is as follows: methyl methacrylate: 14g; Phenyl methacrylate: 4g; Diisopropyl azodicarboxylate: 7g; Azobisisoheptanonitrile: 400mg; ) peroxydicarbonate: 450 mg; 1,4-butylene glycol dimethacrylate: 0.055 g. Deionized water: 112ml; polyvinyl alcohol 1788: 0.56g; sodium chloride: 5.6g.

[0030] According to above-mentioned formula, prepare according to the following method:

[0031] (1) Get methyl methacrylate, phenyl methacrylate, diisopropyl azodicarboxylate, initiator azobisisoheptanonitrile and two (tert-butylcyclohexane) peroxydicarbonate, crosslinking agent 1,4-Butanediol Dimethacrylate, fully stirred and mixed to obtain an oil phase solution. Nitrogen gas was bubbled into the oil phase solution to remove oxygen for 10 minutes.

[0032] (2) Take deionized water, polyvinyl alcohol 1788, and sodium chloride, stir and mix well to make an aqueous phase solution. Nitrogen was blown into the aqueous phase solution to ...

Embodiment 2

[0037] The preparation method is the same as in Example 1. The raw material composition formula of the microspheres is as follows: methyl methacrylate: 14g; phenyl methacrylate: 2g; diisopropyl azodicarboxylate: 10g; azobisisoheptanonitrile: 850mg; 3-Butanediol ester: 0.014 g. Deionized water: 112mL; polyvinyl alcohol 1788: 0.56g; sodium chloride: 5.6g.

[0038] The characterization results showed that the average particle size of the microsphere product produced by the reaction was 247±30 μm. The initial expansion temperature of the microspheres is 172°C, the concentrated foaming temperature is 188°C, and the foaming rupture temperature is 220°C. The expansion ratio of the microspheres is 7.8 times. The appearance of microspheres before and after expansion under the microscope is as follows: figure 2 shown.

Embodiment 3

[0040] The preparation method is the same as in Example 1. The raw material composition formula of microspheres is as follows: methyl methacrylate: 14g; 850mg; 1,4-Butanediol dimethacrylate: 0.01g; 1,3-Butanediol dimethacrylate: 0.03g. Deionized water: 112mL; polyvinyl alcohol 1788: 0.56g; sodium chloride: 5.6g.

[0041]The characterization results showed that the average particle size of the microsphere product produced by the reaction was 510±92 μm. The initial expansion temperature of the microspheres is 170°C, the concentrated foaming temperature is 180°C, and the foaming rupture temperature is 210°C. The foaming expansion ratio of the microspheres is 10.2 times. The appearance of microspheres before and after expansion under the microscope is as follows: image 3 shown.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a physical expansion foaming microsphere coated with diisopropyl azodicarboxylate, the foaming microsphere takes polymethyl methacrylate and polyphenyl methacrylate as shell layer materials, an inner core wraps diisopropyl azodicarboxylate liquid, the foaming microsphere can be used for replacing a diisopropyl azodicarboxylate liquid foaming agent, the color is light, the compatibility with polyurethane, alkyd resin, cyanamide resin and other materials is good, and the production, transportation, use and storage safety of the microspheres is high.

Description

technical field [0001] The invention relates to physically expanded foamed microspheres wrapped with diisopropyl azodicarboxylate and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] Thermally expandable physical foamed microspheres are microsphere particles with a core-shell structure that can physically expand at a certain temperature. Generally, the core of thermally expandable microspheres is mostly low-boiling liquid, and the shell is mostly thermoplastic polymer material. When the microsphere is heated to a certain temperature and exceeds the boiling point of the core liquid, the liquid rapidly vaporizes and expands to generate internal pressure, and the shell material is heated and softened. , under the action of internal pressure, the microspheres expand, and the volume increases to several to tens of times the original volume. When the heat-expandable microspheres are used for plastic foaming, they can reduce ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08J9/32C08J9/10C08F220/14C08F220/18
CPCC08J9/32C08J9/102C08F220/14C08J2203/22C08F220/1806Y02E60/10
Inventor 唐华东朱梦泽
Owner ZHEJIANG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap