Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Polysiloxane microsphere with core-shell structure and preparation method thereof

A technology of polysiloxane and core-shell structure, which is applied in the field of polysiloxane microspheres with core-shell structure and its preparation, and can solve the problems of poor diffusion effect and the like

Active Publication Date: 2014-07-02
ETERNAL SPECIALTY MATERIALS ZHUHAI CO LTD
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, most of the current siloxane polymers have a uniform structure, that is, the refractive index inside the particle is consistent, which makes the diffusion effect through the center of the particle poor.

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
  • Polysiloxane microsphere with core-shell structure and preparation method thereof
  • Polysiloxane microsphere with core-shell structure and preparation method thereof
  • Polysiloxane microsphere with core-shell structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0055] Preparation method of polysiloxane microspheres with core-shell structure

[0056] The polysiloxane microspheres with a core-shell structure of the present invention can be prepared according to conventional methods in the art, and can also be prepared according to the following method, the method comprising steps:

[0057] i) Firstly, the first-stage polymerization reaction is carried out to form the core of polysiloxane microspheres. At a certain temperature (such as 40-80°C or 50-70°C), in 100 parts by weight of alkaline aqueous solution, let 0.1-15 parts by weight (such as 0.1-10 parts by weight) of siloxane monomer (such as a silicon Oxane monomer or a mixture of multiple siloxane monomers) undergoes a polymerization reaction for a period of time (such as 0.5-5 hours or 0.5-2 hours) to obtain a core containing the polysiloxane microspheres. Therefore, the core of polysiloxane microspheres is obtained by polymerizing siloxane monomers in step (i).

[0058] ii) Nex...

Embodiment 1

[0098] Example 1 Preparation of polysiloxane microspheres with a core-shell structure with a core refractive index of 1.43 and a shell refractive index of 1.55

[0099] Take 300g of water, heat it to 65°C, add 14g of methyltrimethoxysilane, add 0.5mol / L NaOH solution under stirring, adjust the pH value to 9.6, and react for 1h to obtain a reaction mixture containing 1.4μm microspheres.

[0100] Under stirring, slowly add a mixed solution of 18.9g of phenyltrimethoxysilane and 8.1g of methyltrimethoxysilane dropwise to the above reaction mixture, react for 2h, filter under reduced pressure, wash with deionized water, and store at 300°C Dry in an oven for 2 hours to obtain polysiloxane microspheres with an average particle size of 2 μm and a core-shell structure. The particle size distribution is shown in figure 2 shown.

[0101] According to the identification of the refractive index, the core refractive index of the polysiloxane microsphere with the core-shell structure is ...

Embodiment 2

[0102] Example 2 Preparation of Polysiloxane Microspheres with Core-Shell Structure with Core Refractive Index of 1.49 and Shell Refractive Index of 1.52

[0103] Take 300g of water, heat it to 80°C, add a mixed solution of 2.7g of phenyltrimethoxysilane and 5.3g of methyltrimethoxysilane, add 0.5mol / L NaOH solution under stirring, adjust the pH value to 10.9, and react 0.5 h, A reaction mixture containing 0.25 μm microspheres was obtained.

[0104] Under stirring, slowly add a mixed solution of 28.5g of phenyltrimethoxysilane and 28.5g of methyltrimethoxysilane to the above reaction mixture dropwise, react for 2h, filter under reduced pressure, wash with deionized water, and directly in 300 °C in an oven for 2 hours to obtain polysiloxane microspheres with a core-shell structure and an average particle size of 0.5 μm.

[0105] It has been identified that the polysiloxane microspheres having a core-shell structure have a core refractive index of 1.49 and a shell refractive in...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a polysiloxane microsphere with a core-shell structure and a preparation method thereof. The polysiloxane microsphere comprises a core, and a shell which wraps the core; the absolute value of the refractive index difference value between the core and the shell is 0.01 to 0.012; and the particle size of the microsphere is 0.1 to 50 microns and accounts for 20 to 70% of the particle size of the polysiloxane microsphere. The polysiloxane microsphere disclosed by the invention can be used as a light diffusant to be applied to LED lighting and LCD backlight and other diffusion materials; and the polysiloxane microsphere is high in light transmittance and also remains good diffusion effect.

Description

technical field [0001] The invention belongs to the field of organic polymer compounds, and relates to a polysiloxane microsphere with a core-shell structure and a preparation method thereof. Background technique [0002] Polysilsesquioxane is composed of silicon atoms and oxygen atoms alternately, and includes various organic groups (such as methyl, ethyl, phenyl, etc.) connected to silicon atoms, so it is a polymer with a stable skeleton. Polysilsesquioxane microspheres have the characteristics of high hardness, high melting point, wear resistance, smoothness, water repellency, flame retardant, non-toxic, odorless, transparent, glossy, physiologically inert, etc., and are stable in structure and friendly to the environment. Therefore, polysilsesquioxane can be used as an additive for plastics. After being added to plastics, it can have the effects of light diffusion, wear resistance and slip enhancement. In addition, polysilsesquioxane can also be used as a blocking agent...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/04C08G77/06G02B5/02
Inventor 任慧卿马霆朱元清卓胜池
Owner ETERNAL SPECIALTY MATERIALS ZHUHAI CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com