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Preparation method of light scattering mould plastic based on SiO2/PMMA

A light scattering and molding compound technology, applied in the field of optical functional materials, can solve problems such as low cost, uneven products, dispersion, etc.

Inactive Publication Date: 2007-12-05
NOTTINGHAM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Chinese Patent No. 97108817.9 proposes to dissolve polystyrene (PS) in methyl methacrylate monomer (MMA), and realize light scattering by phase separation of PMMA and PS after polymerization. This method is low in cost and simple to implement. But it is easy to form light dispersion
This method is simple to operate, but it is difficult to combine nano-SiO 2 The completely uniform distribution, and in the polymerization reaction, nano-SiO 2 Prone to agglomeration and settling, resulting in product inhomogeneity
During the use of materials, it is also easy to produce nano-SiO 2 Migration and agglomeration, resulting in a decrease in light scattering performance

Method used

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  • Preparation method of light scattering mould plastic based on SiO2/PMMA
  • Preparation method of light scattering mould plastic based on SiO2/PMMA
  • Preparation method of light scattering mould plastic based on SiO2/PMMA

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Step 1: Synthesis of Light Scattering Composite Material:

[0051] Add 200 grams of tetraethoxysilane (TEOS), 200 grams of MSMA, 200 grams of PMMA, and 400 grams of MMA into a 1500-ml round-bottomed flask, add 0.8 grams of AIBN as an initiator, and add 0.8 grams of n-butyl mercaptan as Chain transfer agent, obtain transparent reaction solution after fully stirring and dissolving, and this reaction solution is injected in the separating funnel of 1500 milliliters.

[0052] Add 3000 milliliters of distilled water in the three-necked flask of 5 liters, adopt oil bath to heat the temperature of distilled water to 80 degrees Celsius, slowly add reaction solution in distilled water, and keep stirring to the whole system, stirring speed is kept on 500 revolutions per minute, keeps The temperature of the whole system is 80 degrees Celsius. After adding the reaction solution, keep the system temperature and stirring speed constant. After 6 hours, stop heating and keep stirring u...

Embodiment 2

[0058] Step 1: Synthesis of Light Scattering Composite Material:

[0059] Add 20 grams of tetramethoxysilane (TMOS), 100 grams of MSMA, 100 grams of PMMA, and 400 MMA into a 1000 ml round bottom flask, add 0.5 grams of BPO as an initiator, and add 0.2 grams of dodecyl mercaptan as a chain Transfer agent, obtain transparent reaction solution after fully stirring and dissolving, and inject this reaction solution in the separating funnel of 800 milliliters.

[0060] Add 3000 milliliters of distilled water in the three-necked flask of 5 liters, adopt oil bath to heat the temperature of distilled water to 75 degrees centigrade, slowly add reaction solution in distilled water, and keep stirring to whole system, stirring speed is kept on 650 revolutions per minute, keeps The temperature of the whole system is 75 degrees centigrade. After the addition of the reaction solution, keep the system temperature and stirring speed constant, stop heating after 3 hours, and keep stirring until ...

Embodiment 3

[0066] Step 1: Synthesis of Light Scattering Composite Material:

[0067] Add 150 grams of ethoxytrimethoxysilane, 10 grams of MSMA, 100 grams of PMMA, and 550 grams of MMA into a 1000-ml round-bottomed flask, add 0.6 grams of BPO as an initiator, and add 0.8 grams of dodecyl mercaptan as a The chain transfer agent was fully stirred and dissolved to obtain a transparent reaction solution, and this reaction solution was injected into a 1000 ml separatory funnel.

[0068] Add 3000 milliliters of distilled water in the three-necked flask of 5 liters, adopt oil bath to heat the temperature of distilled water to 65 degrees Celsius, slowly add reaction solution in distilled water, and keep stirring to the whole system, stirring speed is kept on 750 revolutions per minute, keeps The temperature of the whole system is 65 degrees Celsius. After adding the reaction solution, keep the system temperature and stirring speed constant. After 4 hours, stop heating and keep stirring until the ...

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Abstract

The present invention belongs to the field of optical functional material technology, and is especially preparation process of SiO2 / PMMA-based light scattering molded material. SiO2 precursor is dissolved into PMMA base to be polymerized; the PMMA base containing SiO2 precursor is then swelled in some solution, so that water molecule is diffused into the PMMA base to hydrolyze the SiO2 precursor, to in-situ produce SiO2 microcrystal with SiO2 chemically combined with the PMMA base and to form the optical scattering composite material. The optical scattering composite material is further pelletized to produce the light scattering molded material. Both the optical scattering composite material and the light scattering molded material have light conducting and diffusing functions, homogeneous scattering and high stability, and may be applied widely in display and lighting fields.

Description

technical field [0001] The invention belongs to the technical field of optical functional materials, in particular to a SiO-based 2 A light-scattering composite material of PMMA and a preparation method for making a light-scattering molding compound from the light-scattering composite material. Background technique [0002] Polymer materials are widely used as various optical functional materials due to their light weight, good flexibility, impact resistance and good processing properties. Their applications include communication, display, CD, decoration, lighting, instrumentation, optical components, etc. field. Light-scattering polymer materials are new materials in the field of polymer optical functional materials, and are widely used in flat panel displays and new-generation semiconductor LED lighting. [0003] Light scattering materials can conduct and diffuse light at the same time, so they can be widely used in display (such as liquid crystal display light guide pla...

Claims

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Application Information

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IPC IPC(8): C08L33/12C08K3/36C08F2/44C08F2/38C08F4/04C08F4/32B29C47/40B29C47/92B29C48/92
CPCB29C47/92
Inventor 顾陈斌刘遥牧新明
Owner NOTTINGHAM TECH
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