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Polymer microspheres, preparation method and application thereof, composition, light diffusion plate or light diffusion film, lamp and backlight module

A technology of light diffusion plate and light diffusion film, which is applied in optics, optical components, nonlinear optics, etc., can solve the problems of inability to obtain light diffusion effect, poor compatibility between hydroxyl and resin matrix, etc., and achieve low refractive index and good transparency. Optical, good compatibility effect

Active Publication Date: 2016-02-03
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] Although the microspheres disclosed in CN102115089A, CN101993086A and CN101220158A can be used as light diffusing agents, when the microspheres disclosed in CN102115089A, CN101993086A and CN101220158A are used as light diffusing agents, the defects of existence are: the hydrophilicity of the microspheres is too strong, and the microspheres There are a lot of hydroxyl groups on the surface of the ball, but the compatibility between the hydroxyl groups and the resin matrix is ​​very poor, which makes the light diffusing agent easy to separate from the transparent resin matrix, or even delaminated, so that the ideal light diffusion effect cannot be obtained.

Method used

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  • Polymer microspheres, preparation method and application thereof, composition, light diffusion plate or light diffusion film, lamp and backlight module
  • Polymer microspheres, preparation method and application thereof, composition, light diffusion plate or light diffusion film, lamp and backlight module
  • Polymer microspheres, preparation method and application thereof, composition, light diffusion plate or light diffusion film, lamp and backlight module

Examples

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preparation example Construction

[0055] The present invention also provides a method for preparing polymer microspheres according to the present invention, the method comprising: under olefin polymerization conditions, contacting acrylate-based monomers with silicone resin microspheres having vinyl groups on the surface and an initiator , to form the polymer microspheres.

[0056] According to the method of the present invention, the ratio between the acrylate monomer and the silicone resin microspheres can be properly selected according to the specific application of the final prepared polymer microspheres. When the final prepared polymer microspheres are used as a light diffusing agent to prepare a light diffusion plate or a light diffusion film, the weight ratio of the acrylate monomer to the silicone resin microspheres can be such that the final prepared polymer microspheres In the spheres, the weight ratio of silicone resin microspheres (ie, inner core) to polymer microspheres is 0.5-0.98:1, preferably 0...

Embodiment 1

[0114] (1) Mix 30 g of vinyltrimethoxysilane and 200 g of ethanol evenly, then adjust the pH value of the mixture to 5 with hydrochloric acid, and stir and react at a temperature of 20° C. for 3 hours. Then, ammonia water with a concentration of 37% by weight was added to the above mixture, the pH of the mixture was adjusted to 9, and the mixture was reacted at a temperature of 10° C. for 3 hours. The reaction mixture is subjected to centrifugation to obtain silicone resin microspheres with vinyl groups on the surface. The amount of vinyl groups on the surface of the silicone resin microspheres was 0.1 mol / g. The silicone resin microspheres had an average particle diameter of 1.0 μm.

[0115] (2) Under the protection of nitrogen, 5 grams of silicone resin microspheres obtained in step (1) were dispersed in 90 grams of deionized water, and 1 gram of methyl methacrylate was added, and allowed to stand for 2 hours. Then, 0.05 g of an azobisisoheptanonitrile initiator was added ...

Embodiment 2

[0117] Adopt the same method as Example 1 to prepare polymer microspheres, the difference is that step (2) is:

[0118] 5 grams of silicone resin microspheres obtained in step (1) were dispersed in 90 grams of deionized water, and 0.5 grams of methyl methacrylate and 0.5 grams of trimethylolpropane trimethacrylate (commercially purchased from Hangzhou Zhejiang University) were added. Fanke Chemical Co., Ltd.), and let stand for 2 hours. Then, 0.05 g of an azobisisoheptanonitrile initiator was added to the above mixture, and the temperature of the mixture was raised to 70° C. with stirring, and maintained at this temperature for 6 hours. The obtained mixture was subjected to centrifugal separation, and the obtained solid microspheres were washed 3 times with deionized water, and dried in a vacuum oven at 60° C. for 2 hours, thereby obtaining 5.85 g of polymer microspheres according to the present invention. The average particle diameter of the polymer microspheres was 1.1 μm. ...

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Abstract

The invention provides a polymer microsphere and a preparation method and application of the polymer microsphere. The polymer microsphere comprises a kernel and a polymer covering layer which is adhered onto the surface of the kernel, wherein the kernel is an organic silicon resin microsphere with vinyl on the surface, and the polymer covering layer contains polymers formed by polymerizing acrylate monomers on the surface of the kernel. The preparation method of the polymer microsphere comprises the step of enabling the acrylate monomers to be in contact with the organic silicon resin microsphere with vinyl on the surface and initiator to form the polymer microsphere under olefin polymerization conditions. The invention additionally provides a composition containing the polymer microsphere and transparent resin, a light diffusion plate or a light diffusion film which is made of the composition, and a lamp and a backlight module which uses the light diffusion plate or the light diffusion film. The polymer microsphere provided by the invention not only has a lower refractive index, but also has good compatibility with transparent resin matrixes for the light diffusion plate and the light diffusion film.

Description

technical field [0001] The present invention relates to a polymer microsphere, its preparation method and application, and a composition containing the polymer microsphere; the present invention also relates to a light diffusion plate formed from the composition or a light diffusion plate formed from the composition Light diffusion film; the present invention further relates to a lamp using the light diffusion plate or light diffusion film and a backlight module for liquid crystal display using the light diffusion plate or light diffusion film. Background technique [0002] Light-diffusing plates and light-diffusing films are products with a certain haze formed by adding organic / inorganic compound particles as light diffusing agents to a transparent resin matrix. They are used in light-emitting diode (LED) lamps and liquid crystal display (LCD) backlight modules has a wide range of applications. [0003] During use, it is found that the light transmittance of light diffusio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F290/06C08F290/14C08G77/20G02B5/02G02B1/04G02F1/13357F21V5/08
Inventor 苗伟峰
Owner BYD CO LTD
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