Unlock instant, AI-driven research and patent intelligence for your innovation.

Fully-aromatic thermotropic liquid crystal polyester resin composition, molded object, and led reflector

A thermotropic liquid crystal and all-aromatic technology, applied in reflective reflectors, liquid crystal materials, semiconductor devices, etc., can solve the problems of reduced light reflectivity of reflectors, reduced LED brightness, and reduced output efficiency, achieving less discoloration, Excellent heat resistance, sufficient light reflectance effect

Active Publication Date: 2012-11-28
JX NIPPON OIL & ENERGY CORP
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, the LED reflector formed by the above-mentioned conventional liquid crystal polyester resin composition has the following problems: the surface of the reflector is easily discolored by the light of the LED, thereby reducing the light reflectance of the reflector and causing the brightness of the LED to decrease (light The output efficiency is reduced)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fully-aromatic thermotropic liquid crystal polyester resin composition, molded object, and led reflector
  • Fully-aromatic thermotropic liquid crystal polyester resin composition, molded object, and led reflector
  • Fully-aromatic thermotropic liquid crystal polyester resin composition, molded object, and led reflector

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0079] As the preparation method of LCP of the present invention, for example, the following method can be enumerated: p-hydroxybenzoic acid, the above-mentioned aromatic dicarboxylic acid and the above-mentioned aromatic dihydroxy compound are composed of 65 mol % to 78 mol%, 11 mol%~17.5 mol% and 11 mol%~17.5 mol% were added, and melt polycondensation was carried out.

[0080] In the production of the LCP of the present invention, in order to shorten the melt polycondensation time and reduce the influence of the heat history in the process, it is preferable to carry out the melt polycondensation after acetylating the hydroxyl groups of the above-mentioned monomers in advance. In addition, in order to simplify the process, acetylation is preferably performed by supplying acetic anhydride to the monomer in the reaction tank, and the acetylation process is preferably performed using the same reaction tank as the melt polycondensation step. That is, it is preferable to carry out...

Embodiment

[0107] Hereinafter, the present invention will be described more specifically by way of examples, but the present invention is not limited to the following examples.

[0108] [First Example and Comparative Example]

[0109]

[0110] First, a production example of a wholly aromatic thermotropic liquid crystal polyester is shown below. In addition, Table 1 shows the monomer composition (mol %) and melting point of each polyester produced.

manufacture example 1

[0111] (Manufacture Example 1: Manufacture of Whole Aromatic Thermotropic Liquid Crystal Polyester (A))

[0112] With SUS 316 as a material, there is a double-helical stirring blade and an internal volume of 1700L polymerization tank (manufactured by Kobe Steel Co., Ltd.) to add p-hydroxybenzoic acid (manufactured by Ueno Pharmaceutical Co., Ltd.) 207.2kg (1.5 kilomoles), para Phthalic acid (manufactured by Mitsui Chemicals Co., Ltd.) 31.1 kg (0.19 kilomole), isophthalic acid (manufactured by A.G. International Chemical Co., Inc.) 17.3 kg (0.1 kilomole), 4,4'-dihydroxybiphenyl ( Honshu Chemical Industry Co., Ltd.) 54.3kg (0.29 kilomoles), as a catalyst, potassium acetate (KISHIDA CHEMICAL Co., Ltd.) 0.05kg and magnesium acetate (KISHIDA CHEMICAL Co., Ltd.) 0.15kg, two The decompression of the polymerization tank-nitrogen gas injection is carried out for nitrogen replacement, and then 215.7 kg (2.11 kilomoles) of acetic anhydride is further added, the rotation speed of the stir...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Pour pointaaaaaaaaaa
Melting pointaaaaaaaaaa
Lengthaaaaaaaaaa
Login to View More

Abstract

The disclosed fully-aromatic thermotropic liquid crystal polyester resin composition includes 100 parts by mass of a fully-aromatic thermotropic liquid crystal polyester and 50-150 parts by mass of titanium oxide, and has a repeating structural unit represented by formula (1), a repeating structural unit represented by general formula (2) and a repeating structural unit represented by general formula (3), with the repeating structural unit represented by formula (1) being included at a proportion of 65-78 mol%. In formula (2) and formula (3), X and Y represent bivalent groups comprising an aromatic ring. The formula (1), formula (2) and formula (3) are shown in the description.

Description

technical field [0001] The invention relates to a wholly aromatic thermotropic liquid crystal polyester resin composition, its molded body and an LED reflector. Background technique [0002] In an LED (Light Emitting Diode) light emitting device, a reflector (white reflective frame) is provided around the LED element in order to improve the light utilization efficiency of the LED. As molding materials for LED reflectors, various liquid crystal polyester resin compositions containing liquid crystal polyester excellent in heat resistance and white pigments such as titanium oxide have been proposed (see, for example, Patent Documents 1 to 5 below). [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Publication No. 06-38520 [0006] Patent Document 2: Japanese Patent Laid-Open No. 2004-256673 [0007] Patent Document 3: Japanese Patent Laid-Open No. 2004-277539 [0008] Patent Document 4: Japanese Patent Laid-Open No. 2007-25...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L67/00C08G63/60C08G63/78C08K3/22G02B5/08
CPCG02B5/3016G02B5/12H01L33/60C08K3/22C08K2003/2237C09K2019/521C09K19/3809G02B5/30C08G63/605C09K2323/00B29B7/90B29B7/48B29B7/007B29B7/726B29B9/12B29B9/06C08L67/00
Inventor 北居彻中山敏雄室内聪士
Owner JX NIPPON OIL & ENERGY CORP