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Liquid-crystal polymer particles, thermally curable resin composition, and molded object

A technology of liquid crystal polymers and resin compositions, applied in the direction of liquid crystal materials, chemical instruments and methods, coatings, etc., can solve the problems of low melt tension, poor film forming productivity, expensive films, etc., and reduce the dielectric loss tangent , the effect of suppressing surface roughness

Pending Publication Date: 2022-02-08
JXTJ NIPPON OIL & ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since liquid crystal polymers generally have low melt tension, film molding productivity is poor, so there is a problem that films made of liquid crystal polymers are expensive.

Method used

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  • Liquid-crystal polymer particles, thermally curable resin composition, and molded object
  • Liquid-crystal polymer particles, thermally curable resin composition, and molded object
  • Liquid-crystal polymer particles, thermally curable resin composition, and molded object

Examples

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Effect test

Embodiment

[0119] Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to an Example.

[0120]

Synthetic example 1

[0122] 60 mol% of 6-hydroxy-2-naphthoic acid (HNA), 20 mol% of 4,4-dihydroxybiphenyl (BP), 15.5 mol% of terephthalic acid (TPA), 4.5 mol% of 2,6-naphthalene dicarboxylic acid (NADA), charged with potassium acetate and magnesium acetate as a catalyst, depressurized the polymerization vessel-nitrogen injection three times to replace nitrogen, and then added acetic anhydride (relative to the hydroxyl group) 1.08 molar equivalent), the temperature was raised to 150° C., and the acetylation reaction was carried out under reflux for 2 hours.

[0123] After the acetylation was completed, the temperature of the polymerization vessel in which acetic acid was distilled was raised at 0.5°C / min, and when the melt temperature in the tank reached 310°C, the polymer was drawn out and cooled to solidify. The obtained polymer was pulverized to a size passing through a sieve with a mesh size of 2.0 mm to obtain a prepolymer.

[0124] Next, the temperature of the prepolymer obtained above was r...

Synthetic example 2

[0126] Change the monomers added to 60 mol% of p-hydroxybenzoic acid (HBA), 20 mol% of BP, 15 mol% of TPA and 5 mol% of IPA, so that the final temperature of solid-phase polymerization is 265 ° C, and the holding time Except that it was 1 hour, it carried out similarly to the synthesis example 1, and obtained the liquid crystal polymer B. Next, it was confirmed that the obtained liquid crystal polymer B exhibited liquid crystallinity in the same manner as above.

[0127]

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Abstract

To provide liquid-crystal polymer particles which, when added to a resin film, can reduce the dielectric dissipation factor while inhibiting the surface roughness of the resin film from increasing. Liquid-crystal polymer particles according to the present invention have a melting point of 270 DEG C or higher and have a particle diameter distribution in which the 50%-cumulative diameter D50 is 20 [mu]m or smaller and the 90%-cumulative diameter D90 is up to 2.5 times the D50.

Description

technical field [0001] The present invention relates to liquid crystal polymer particles. Furthermore, the present invention relates to a thermosetting resin composition containing the liquid crystal polymer particles and a molded article using the thermosetting resin composition. Background technique [0002] In recent years, with the increase in the amount of information communication in the communication field, the use of signals with frequencies in the high frequency band has increased in electronic equipment, communication equipment, etc., and in particular, signals with a frequency of 10 9 A signal of a frequency in the gigahertz (GHz) band above Hz. 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. The transmission loss includes the conductor loss caused by the conductor and the dielectric loss caused by the resin compositio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/12C08J5/18C08L67/00C08L79/04H05K1/03
CPCC08J3/12C08J5/18H05K1/0353C08J2379/04C08J2467/00C08L79/08C08G73/1071C09D179/08C08G63/605C08L61/04H05K1/0373H05K1/0393H05K2201/0141H05K2201/0212H05K3/0014H05K2201/09118C08J2300/12C08J2367/03C08J2467/03C08J2379/08C08J3/212C09K19/3809C09K2219/03C08L67/03C08G63/60C08L67/00C08L101/00C08L63/00C08J3/20C09K19/544C09K2019/546
Inventor 江头俊昭
Owner JXTJ NIPPON OIL & ENERGY CORP