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Reflective body and a light-emitting device equipped with the same

一种反射体、液晶聚酯的技术，应用在半导体器件、电气元件、电路等方向，能够解决画面明暗或彩度不稳定、成型品表面产生裂纹、不能形成成型品等问题，达到减少初期反射率降低现象、防止变色、发光功能提高的效果

Active Publication Date: 2013-07-17
CHONGQING WOTE HIGH PERFORMANCE POLYMER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conventional wholly aromatic liquid crystal polyester resin cannot form a molded product with a dense structure during injection molding, and cracks often occur on the surface of the molded product. Characteristics, especially the phenomenon that the reflectance drops sharply in the early stage of reliability evaluation, as the reflection of illuminants used for internal or external lighting or TV backlight units that require long-term stability to light and heat In the case of stereo, there is a problem of unstable brightness or chroma of the picture

Method used

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  • Reflective body and a light-emitting device equipped with the same
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  • Reflective body and a light-emitting device equipped with the same

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1-1

[0057] Production Example 1-1: Production of Whole Aromatic Liquid Crystal Polyester Resin (1)

[0058] In a batch reactor with a capacity of 10 liters capable of adjusting the temperature, 3.018 kg of p-hydroxybenzoic acid, 1.300 kg of 6-hydroxy-2-naphthoic acid and 0.3 g of potassium acetate (catalyst) were injected and nitrogen gas was injected to make the inside of the above-mentioned reactor After the space became inactive, 3.024 kg of acetic anhydride (acetic anhydride) was further added to the reactor. Thereafter, the temperature of the reactor was raised to 150° C. over 30 minutes, and the hydroxyl group of the above monomer was acetylated at the above temperature for 2 hours. Then, while removing the acetic acid produced in the above-mentioned acetylation reaction, the temperature of the reactor was raised to 320°C over 5 hours and 20 minutes and then maintained for 20 minutes to produce a wholly aromatic liquid crystal polyester prepolymer by polycondensation react...

manufacture example 1-2

[0060] Production Example 1-2: Production of Whole Aromatic Liquid Crystal Polyester Resin (2)

[0061] 6.214 kg of p-hydroxybenzoic acid, 1.422 kg of terephthalic acid, and 1.121 kg of isophthalic acid were charged into a batch reactor with a capacity of 10 liters and the temperature could be adjusted, and nitrogen gas was injected to make the internal space of the reactor inactive. State, then add acetic anhydride 3.190kg again to above-mentioned reactor. After that, the temperature of the reactor was raised to 150° C. over 30 minutes and the hydroxyl groups of the above monomers were acetylated at the above temperature for 3 hours. Then, while removing the acetic acid produced in the above-mentioned acetylation reaction, the temperature of the reactor was raised to 330° C. over 6 hours to produce a wholly aromatic liquid crystal polyester prepolymer (2) by polycondensation reaction of monomers. In addition, acetic acid is regenerated as a by-product during the production...

manufacture example 2-1

[0063] Production Example 2-1: Production of Whole Aromatic Liquid Crystal Polyester Resin Compound (1)

[0064] The wholly aromatic liquid crystal polyester resin produced in the above-mentioned production example 1-1, glass fibers with a length distribution of 100-300 μm, an average length of 150 μm, and a diameter of 10±1 μm (SEONGJIN FIBER, Korea, MF150W-AC), and Titanium oxide (Dupont, T-Pure R-105) coated with UV-stabilized aluminum oxide, silicon oxide, and a hydrophobic organic compound was mixed in a ratio of 5:1:4 by weight and used batchwise A mixer (product of Daiichi Industrial Machinery Co., Ltd.) was mixed for 30 minutes. After that, dry in an oven drier (ASUNG PLANT product) at 130°C for more than 4 hours to reduce the moisture content to below 200wtppm, and then use a twin-screw extruder (L / D: 40, diameter: 25mm) at 10kg per hour The wholly aromatic liquid crystal polyester resin compound (1) was produced by melt-kneading while quantitatively conveying at a...

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Abstract

Disclosed are a reflective body and a light-emitting device equipped with the same. The disclosed reflective body comprises a compound of a wholly aromatic liquid crystal polyester resin comprising a repeating unit derived from dihydroxybenzoic acid and a repeating unit derived from hydroxynaphthoic acid but not comprising any repeating units derived from an aromatic dicarboxylic acid; and the compound of a wholly aromatic liquid crystal polyester resin additionally comprises a white inorganic filler.

Description

technical field [0001] The invention discloses a reflector and a light-emitting device equipped with it. More specifically, reflections of composites having wholly aromatic liquid crystalline polyester resins comprising repeating units derived from hydroxybenzoic acid and repeating units derived from hydroxynaphthoic acid and not comprising repeating units derived from aromatic dicarboxylic acids are disclosed body and a light emitting device equipped with it. Background technique [0002] Polyamide-based resins, which are easy to injection mold, are widely used in various reflectors such as reflectors for LEDs (light emitting diodes). However, such polyamide-based resins are discolored when exposed to light and heat from light-emitting devices such as LEDs operating at high voltage for a long time, so that they cannot function as reflectors smoothly, and have the effect of reducing the light emission of the light-emitting devices. Questions of function and longevity. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/60C08L33/06C08K3/00
CPCC08G63/065C08K7/14H01L33/60C08K2003/2237C08L33/06C08K2201/004C08L67/03C08K2201/003C08K3/22C08L67/04
Inventor 李玧应李振揆吴永泽
Owner CHONGQING WOTE HIGH PERFORMANCE POLYMER CO LTD
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