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Wholly aromatic liquid crystal polyester resin, molded article, and electrical/electronic component

一种液晶聚酯、全芳香族的技术，应用在全芳香族液晶聚酯树脂领域，能够解决输出信号品质降低、传输损耗增大等问题，达到提高耐热性、提高膜制造性、耐热性以及加工性的平衡优异的效果

Active Publication Date: 2019-11-22
JXTJ NIPPON OIL & ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, as the frequency of the signal used increases, the quality of the output signal that may cause erroneous recognition of information decreases, that is, the transmission loss increases.

Method used

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  • Wholly aromatic liquid crystal polyester resin, molded article, and electrical/electronic component
  • Wholly aromatic liquid crystal polyester resin, molded article, and electrical/electronic component
  • Wholly aromatic liquid crystal polyester resin, molded article, and electrical/electronic component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0132] Add 5 mol% of p-hydroxybenzoic acid (HBA), 48 mol% of 6-hydroxy-2-naphthoic acid (HNA), 23.5 mol% of 4,4-dihydroxybiphenyl (BP), 23.5 mol% of terephthalic acid (TPA), charged with potassium acetate and magnesium acetate as a catalyst, decompression-nitrogen injection of the polymerization vessel was performed 3 times, and after nitrogen replacement, acetic anhydride (1.08% relative to the hydroxyl group) was added. molar equivalent), the temperature was raised to 150° C., and the acetylation reaction was carried out under reflux for 2 hours.

[0133] After the acetylation, the polymerization container in the state where the acetic acid was distilled was heated up at 0.5°C / min. When the melt temperature in the tank reached 300°C, the polymer was taken out and cooled to solidify. The obtained polymer was pulverized to a size capable of passing through a sieve with a mesh size of 2.0 mm to obtain a prepolymer.

[0134] Next, in an oven manufactured by Yamato Scientific Co...

Embodiment 2

[0136] A liquid crystal polyester resin was obtained in the same manner as in Example 1 except that the charged amount of the monomers was changed to 3 mol % of HBA, 54 mol % of HNA, 21.5 mol % of BP, and 21.5 mol % of TPA, and it was confirmed in the same manner as above liquid crystallinity.

Embodiment 3

[0138] A liquid crystal polyester resin was obtained in the same manner as in Example 1 except that the charged amount of the monomer was changed to 6 mol % of HBA, 54 mol % of HNA, 20 mol % of BP, and 20 mol % of TPA, and it was confirmed in the same manner as above liquid crystallinity.

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Abstract

The invention provides a wholly aromatic liquid crystal polyester resin which achieves an excellent balance between heat resistance and processability and has a particularly low dielectric loss tangent. The wholly aromatic liquid crystal polyester resin according to the present invention is characterized by containing a constituent unit (I) derived from p-hydroxybenzoic acid, a constituent unit (II) derived from 6-hydroxy-2-naphthoic acid, a constituent unit (III) derived from an aromatic diol compound and a constituent unit (IV) derived from an aromatic dicarboxylic acid, and is also characterized in that the composition ratios (mol%) of the constituent units (I)-(IV) satisfy the following conditions: 2 mol% <= constituent unit (I) <= 9 mol%; 40 mol% <= constituent unit (II) <= 75 mol%; 9mol% <= constituent unit (III) <= 24 mol%; and 9 mol% <= constituent unit (IV) <= 24 mol%.

Description

technical field [0001] The present invention relates to a wholly aromatic liquid crystal polyester resin, and more specifically, to a wholly aromatic liquid crystal polyester resin having a particularly low dielectric loss tangent, a molded article comprising the wholly aromatic liquid crystal polyester resin, and a molded article comprising the wholly aromatic liquid crystal polyester resin. Electrical and electronic components of products. Background technique [0002] In recent years, with the increase in the amount of information traffic in the communication field, the use of signals with high-band frequencies in electronic equipment and communication equipment has increased, and in particular, the use of signals with a frequency of 10 9 Signals with frequencies in the gigahertz (GHz) band above Hz. For example, a high frequency band of the GHz band is used in the automotive field. Specifically, millimeter-wave radars and quasi-millimeter-wave radars mounted for the pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/60C08J5/18
CPCC08G63/065C08G63/183C08G63/189C08G63/191C08G63/193C08G63/605C08J5/18C08J2300/12C08J2367/03C08L67/03B29C45/0001B29K2067/04B29K2995/0006
Inventor 鹫野豪介
Owner JXTJ NIPPON OIL & ENERGY CORP
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