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A kind of polystyrene resin material for light diffusion plate and preparation method thereof

A polystyrene resin, light diffusing plate technology, applied in the direction of diffusing elements, etc., can solve the problems of poor heat resistance, yellowing and toughness, harmful light transmittance and yellowing, low light transmittance, etc. Improve light transmittance, overcome oxidative brittleness and high light transmittance

Active Publication Date: 2021-02-09
HUIZHOU RENXIN NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the extensive application of LED light sources in LCD TVs, the diffusion of LED light sources generally uses polymethyl methacrylate as the base material to produce light diffusion plates. Although the price of polystyrene raw materials is low and the processing performance is superior, the existing products The heat resistance, yellowing and toughness of polystyrene are worse than that of polymethyl methacrylate. In addition, polystyrene products are usually added with additives that are harmful to light transmittance and yellowing in order to adapt to various processing and application customers. , so that the light transmittance of polystyrene products is lower and it is easy to yellow, which leads to the limitation of the application of polystyrene in LED light diffusion plate

Method used

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  • A kind of polystyrene resin material for light diffusion plate and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] Step S1, material preparation: directly add the measured styrene monomer and mineral oil into the prepolymerization reactor, wherein the addition amount of styrene monomer is 99.6wt%, and the addition amount of mineral oil is 0.1wt%;

[0030] Step S2, preliminary pre-polymerization of materials: the addition of lubricant zinc stearate is 0.05wt%, the release agent ethylene bisstearamide is 0.1wt%, the antioxidant tris(2,4-di-tert-butyl) The addition amount of phenyl phosphite is 0.05wt% and the addition amount of antioxidant auxiliary agent 3-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate is 0.1wt%. After the mixture is filtered through a filter, it is injected into the pre-polymerization tank preheater to preheat to 88°C, and then the pre-polymerization reactor, styrene monomer and mineral oil are added for pre-polymerization reaction. The pre-polymerization reactor controls the temperature at 126°C and the liquid level at 58%. , Vacuum pressure is controll...

Embodiment 2

[0035] Step S1, material preparation: directly add the measured styrene monomer and mineral oil into the prepolymerization reactor, wherein the addition amount of styrene monomer is 99.25wt%, and the addition amount of mineral oil is 0.5wt%;

[0036] Step S2, preliminary pre-polymerization of materials: the addition of lubricant zinc stearate is 0.1wt%, the addition of antioxidant tris(2,4-di-tert-butyl)phenyl phosphite is 0.1wt%, and antioxidant auxiliary agent 3 -(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate is 0.05wt%, and the above additives are mixed and filtered through a filter, and then injected into the pre-polymerization kettle preheater to preheat to 89°C. Then add pre-polymerization reactor, styrene monomer and mineral oil to carry out pre-polymerization reaction. The temperature of pre-polymerization reactor is controlled at 125°C, the liquid level is 56%, and the vacuum pressure is controlled at 54kPa to obtain the preliminary pre-polymer. The convers...

Embodiment 3

[0041] Step S1, material preparation: directly add the measured styrene monomer and mineral oil into the prepolymerization reactor, wherein the addition amount of styrene monomer is 99.2wt%, and the addition amount of mineral oil is 0.25wt%;

[0042] Step S2, preliminary pre-polymerization of materials: the addition of mold release agent ethylene bis stearamide is 0.05wt%, the addition of antioxidant tris(2,4-di-tert-butyl)phenyl phosphite is 0.3wt% and antioxidant The auxiliary agent 3-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate is 0.2wt%. 93°C, then add the prepolymerization reactor, styrene monomer and mineral oil for prepolymerization reaction, the temperature of the prepolymerization reactor is controlled at 128.5°C, the liquid level is 60%, and the vacuum pressure is controlled at 58kPa, and the preliminary prepolymer is obtained. The polymerization conversion rate is 34%;

[0043] Step S3, multi-step polymerization of materials: the preliminary pre-polym...

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Abstract

Disclosed are a polystyrene material for a light diffusion plate and a preparation method therefor, wherein the polystyrene material for a light diffusion plate is composed of a styrene monomer, a mineral oil, a lubricant, a mold release agent, an antioxidant and an antioxidant adjuvant, and each component in weight percent is as follows: 98 wt％ - 99.8 wt％ of the styrene monomer, 0 - 0.5 wt％ of the mineral oil, 0 - 0.1 wt％ of the lubricant, 0 - 0.1 wt％ of the mold release agent, 0.05 wt％ - 0.3 wt％ of the antioxidant, and 0.05 wt％ - 0.2 wt％ of the antioxidant adjuvant. The polystyrene material for a light diffusion plate is prepared by means of step S1, the formulation of materials; step S2, the initial prepolymerization of materials; step S3, the multi-step polymerization of materials; step S4, the vacuum devolatilization of materials; and step S5, finished product granulating. Disclosed are a polystyrene material for a light diffusion plate and a preparation method therefor. The polystyrene material has the properties of high light transmission, oxidation resistance and yellowing resistance, and the preparation method is simple. By means of a polymerization reaction, styrene monomers are polymerized to form cross-linked styrene, thereby improving the toughness of the material and resulting in a high material conversion rate.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a polystyrene resin material used for a light diffusion plate and a preparation method thereof. Background technique [0002] With the extensive application of LED light sources in LCD TVs, the diffusion of LED light sources generally uses polymethyl methacrylate as the base material to produce light diffusion plates. Although the price of polystyrene raw materials is low and the processing performance is superior, the existing products The heat resistance, yellowing and toughness of polystyrene are worse than that of polymethyl methacrylate. In addition, polystyrene products are usually added with additives that are harmful to light transmittance and yellowing in order to adapt to various processing and application customers. , so that the light transmittance of polystyrene products is lower and easy to yellow, resulting in the limitation of the application of polystyrene in LED...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F112/08C08F2/44C08K5/098C08K5/20C08K5/526C08K5/134C08K5/00C08L25/06C08L91/00G02B5/02
CPCC08F2/44C08F112/08C08L25/06C08L2201/08C08L2201/10G02B5/02C08L91/00C08K5/098C08K5/20C08K5/526C08K5/1345C08K5/00
Inventor 陈章华苏杰关杰华
Owner HUIZHOU RENXIN NEW MATERIAL CO LTD
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