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High light-transmittance and high light-shielding polystyrene composition and preparation method of composition

A polystyrene, high light-shielding technology, applied in the field of high light-transmitting, high light-shielding polystyrene composition and its preparation, can solve the problems of reducing the mechanical properties of luminescent materials, product quality, impact toughness, etc., and achieve production costs Effect of low, maintaining impact strength, and good impact strength

Active Publication Date: 2014-03-12
GUANGDONG SILVER AGE SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of polystyrene are its brittleness, low impact strength, prone to stress cracking, poor heat resistance, etc.
When polystyrene is used as the outer cover or thin wall of LED lighting fixtures, the light diffusing agent is added to polystyrene to enhance its dispersion effect, which will make the resulting product appear white mist, with low light transmittance, which cannot meet the lighting requirements. In addition, it will also reduce the mechanical properties of luminescent materials, especially the impact toughness, and the products made are easy to break, especially thin-walled LED lighting products are more likely to break, and the product quality is reduced, so how to ensure no loss Achieving a balance between haze and light transmittance while maintaining the toughness of the material is a key problem to be solved in the development of polystyrene

Method used

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  • High light-transmittance and high light-shielding polystyrene composition and preparation method of composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] First, 0.1% of silicone resin light diffusing agent, 0.1% of vinyl bis stearamide, 0.1% of n-octadecyl alcohol of β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate Put ester and 0.1% tris(2,4-di-tert-butylphenyl) phosphite into a high-speed mixer and stir evenly. The stirring speed of the high-speed mixer is 100r / min, and the stirring time is 5min; Styrene is stirred in three stages to make a uniform material. The stirring speed of the first stage is 20r / min, and the stirring time is 4min. The stirring speed of the second stage is 100r / min, and the stirring time is 4min. The stirring speed of the section stirring is 50r / min, and the stirring time is 4min; finally, the uniformly mixed material is put into a twin-screw extruder for extrusion and granulation. The exit temperature is 160°C, the extrusion temperature in the melt conveying section is 170°C, the head temperature is 170°C, and the vacuum degree during extrusion granulation is 0.6MPa.

Embodiment 2

[0059] First, add 0.2% silicone resin light diffusing agent, 0.1% vinyl bis stearamide, 0.1% n-octadecyl alcohol of β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate Put ester and 0.1% tris(2,4-di-tert-butylphenyl) phosphite into a high-speed mixer and stir evenly. The stirring speed of the high-speed mixer is 110r / min, and the stirring time is 4min; Styrene is stirred in three stages to make a uniform material. The stirring speed of the first stage is 30r / min, and the stirring time is 3min. The stirring speed of the second stage is 120r / min, and the stirring time is 4min. The stirring speed of the section stirring is 20r / min, and the stirring time is 3min; finally, the uniformly mixed material is put into a twin-screw extruder for extrusion and granulation. The exit temperature is 170°C, the extrusion temperature in the melt conveying section is 180°C, the head temperature is 185°C, and the vacuum degree during extrusion granulation is 0.7MPa.

Embodiment 3

[0061] First, 0.3% of silicone resin light diffusing agent, 0.1% of vinyl bis stearamide, 0.1% of magnesium stearate, 0.1% of β-(3,5-di-tert-butyl-4-hydroxyphenyl ) n-octadecanyl propionate and 0.1% tris(2,4-di-tert-butylphenyl) phosphite were placed in a high-speed mixer and stirred evenly. The stirring speed of the high-speed mixer was 120r / min, and the stirring time was 4min; then add 99.3% polystyrene for three-stage stirring to make a uniform material. The stirring speed of the first stage of stirring is 35r / min, the stirring time is 3min, and the stirring speed of the second stage of stirring is 120r / min , the stirring time is 3min, the stirring speed of the third stage stirring is 30r / min, and the stirring time is 2min; finally, the uniformly mixed material is put into a twin-screw extruder for extrusion granulation, and the extrusion temperature of the pellet feeding section is 170°C, the extrusion temperature of the plasticizing section is 180°C, the extrusion tempera...

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Abstract

The invention relates to the technical field of polystyrene composition, particularly to high light-transmittance and high light-shielding polystyrene composition. The high light-transmittance and high light-shielding polystyrene composition is prepared from the following materials by weight: 98.2%-99.6% of polystyrene, 0-1% of silicon light diffusing agent, 0.1-0.2% of a lubricating agent, 0.1-0.2% of a dispersing agent, 0.1-0.3% of antioxidant A and 0.1-0.2% of antioxidant B. The preparation method comprises the steps of uniformly agitating the constituents except for polystyrene by a high-speed mixer; putting the polystyrene and the uniformly mixed materials into the high-speed mixer to carry out three-segment agitation, and extruding and pelletizing the uniformly mixed materials by a double-screw extruder. The polystyrene composition disclosed by the invention is high in light transmittance, high in light shielding property, good in impact strength, good in balance of haze and light transmittance, high in structure strength of the prepared product, simple in process, low in production cost and beneficial for generalization and application.

Description

technical field [0001] The invention relates to the technical field of polystyrene compositions, in particular to a polystyrene composition with high light transmission and high shading and a preparation method thereof. Background technique [0002] Light-emitting diodes (Light Emitting Diode, LED) are increasingly widely used in the fields of display, transportation, electrical appliances and lighting due to their small size, long life, rich color rendering and outstanding energy-saving and environmental protection characteristics. , one of the key technologies for cleaner production and sustainable development. [0003] Due to its light-emitting characteristics of point light sources and high brightness, LEDs have disadvantages compared with conventional light sources such as strong light, glare, people can't look directly, or can't get soft visual effects in the field of lighting. In order to make up for the lack of application of LED light sources in the field of lighti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/06C08L83/00C08K5/20C08K5/098C08K5/134C08K5/526B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/875B29C48/92B29C2948/9259B29C2948/92704B29C2948/92895B29C2948/92904
Inventor 邓虎傅轶招启强谭颂斌
Owner GUANGDONG SILVER AGE SCI & TECH CO LTD
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