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

A liquid crystal polyester and all aromatic technology, which is applied in the field of all aromatic liquid crystal polyester resins and molded products, can solve the problems of increased transmission loss and reduced output signal quality, and achieves low dielectric loss tangent and high film manufacturing Excellent balance of stability, heat resistance and processability

Active Publication Date: 2019-04-02
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 1－1

[0182] (Example 1-1: Synthesis of Whole Aromatic Liquid Crystal Polyester Resin A)

[0183] Add 203.24g (60 mol%) of 6-hydroxy-2-naphthoic acid (HNA), 67.03g (20 mol%) of 4,4-dihydroxybiphenyl (BP), and 53.83 g (18 mol%) of formic acid (TPA) and 5.98 g (2 mol %) of isophthalic acid (IPA) were loaded with potassium acetate and magnesium acetate as catalysts, and the decompression-nitrogen injection of the polymerization vessel was carried out for 3 Next, after nitrogen substitution, 198.46 g of acetic anhydride (1.08 molar equivalent relative to the hydroxyl group) was added, the temperature was raised to 150° C., and the acetylation reaction was carried out under reflux for 2 hours.

[0184] After the acetylation was completed, the temperature of the polymerization vessel in which acetic acid was distilled was raised at 0.5°C / min. When the temperature of the melt in the tank reached 310°C, the polymer was taken out and cooled to solidify. The obtained polymer was pulverized t...

Embodiment 1－2

[0186] (Example 1-2: Synthesis of Whole Aromatic Liquid Crystal Polyester Resin B)

[0187] The same procedure as in Example 1-1 was performed except that the loading amount of the monomers was changed to 60 mol% of HNA, 20 mol% of BP, 19.5 mol% of TPA, and 0.5 mol% of IPA, and the final temperature of the solid-state polymerization was set to 300°C. Liquid crystal polyester resin B was obtained by the same operation as above, and the liquid crystallinity was confirmed by the same operation as above.

Embodiment 1－3

[0188] (Example 1-3: Synthesis of Whole Aromatic Liquid Crystal Polyester Resin C)

[0189] The same procedure as in Example 1-1 was performed except that the loading amount of the monomers was changed to 60 mol% of HNA, 20 mol% of BP, 15.5 mol% of TPA, and 4.5 mol% of IPA, and the final temperature of the solid-state polymerization was set to 300°C. Liquid crystal polyester resin C was obtained by the same operation as above, and the liquid crystallinity was confirmed by the same operation as above.

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PUM

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Abstract

To provide a wholly aromatic liquid crystal polyester resin that exhibits excellent heat resistance while having an extremely low dielectric loss tangent. This wholly aromatic liquid crystal polyesterresin is characterized by containing constituent units (I) derived from 6-hydroxy-2-naphthoic acid, constituent units (II) derived from an aromatic diol compound, and constituent units (III) derivedfrom an aromatic dicarboxylic acid compound, with the constituent units (III) containing constituent units (IIIA) derived from terephthalic acid and further containing at least one type selected fromamong constituent units (IIIB) derived from 2,6-naphthalenedicarboxylic acid and constituent units (IIIC) derived from isophthalic acid, and with the compositional ratios of the constituent units satisfying the following conditions: 40 mol.% <=constituent unit (I) <= 80 mol.% 10 mol.% <= constituent unit (II) <= 30 mol.% 3 mol.% <= constituent unit (IIIA) <= 28 mol.% 0 mol.% <= constituent unit (IIIB) <= 9 mol.% 0 mol.% <= constituent unit (IIIC) < 5 mol.% (However, it is not possible for the quantity of both constituent units (IIIB) and constituent units (IIIC) to be 0 mol.%).

Description

technical field [0001] The present invention relates to a wholly aromatic liquid crystal polyester resin and a molded article, and more specifically, to a wholly aromatic liquid crystal polyester resin having a particularly low dielectric loss tangent, and a molded article comprising the wholly aromatic liquid crystal polyester resin, and Electrical and electronic components. 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 above the gigahertz (GHz) band frequency. 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 purpose of preventing car collisions use high frequencies of 76 to 79 GHz and 24 G...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/60H01B3/42H01B17/56
CPCH01B17/56H01B3/42H01B3/421C08G63/605C08J5/18C08L67/03C08J2367/03C08L2203/20C08G63/60B29C45/0001B29K2067/00C08G2250/00
Inventor 鹫野豪介
Owner JXTJ NIPPON OIL & ENERGY CORP
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