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Particle mixture and injection molded body

一种混合物、颗粒的技术，应用在化学仪器和方法、液晶材料等方向，能够解决成型体尺寸、外观影响、计量时间有偏差等问题，达到色调优异、计量稳定性优异的效果

Active Publication Date: 2020-06-09
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is a deviation in the measurement time during molding, there is a problem that the size and appearance of the molded product will be affected

Method used

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  • Particle mixture and injection molded body
  • Particle mixture and injection molded body
  • Particle mixture and injection molded body

Examples

Experimental program
Comparison scheme
Effect test

manufacture example

[0359]

[0360] 994.5g (7.2 moles) of 4-hydroxybenzoic acid and 446.9g (2.4 moles) of 4,4'-dihydroxybiphenyl were put into the reactor with stirring device, torque meter, nitrogen gas introduction pipe, thermometer and reflux cooler , 299.0 g (1.8 moles) of terephthalic acid, 99.7 g (0.6 moles) of isophthalic acid and 1347.6 g (13.2 moles) of acetic anhydride, 0.2 g of 1-methylimidazole was added as a catalyst, and the reaction was fully replaced with nitrogen inside the device.

[0361] Next, while stirring under a nitrogen stream, the temperature was raised from room temperature to 150° C. over 30 minutes, and the same temperature was maintained and refluxed for 30 minutes.

[0362] Then, 2.4 g of 1-methylimidazole was added, while the by-product acetic acid and unreacted acetic anhydride were distilled off, the temperature was raised from 150°C to 320°C over 2 hours and 50 minutes, and the contents were kept at 320°C for 30 minutes. , let it cool to room temperature.

...

Embodiment 1～7、 comparative example 1～4

[0372]First, using a twin-screw extruder (manufactured by Ikegai Iron Works Co., Ltd. (Ikegai Iron Works Co., Ltd., "PCM-30")), the liquid crystal polyester resin and the inorganic filler were mixed in the cylinder at the ratios shown in Table 1 and Table 2. The melt-kneaded product was obtained by melting and kneading under the conditions of a temperature of 340° C. and a screw rotation speed of 150 rpm. Then, the obtained melt-kneaded product was discharged into strands through a circular discharge port, cooled, and then pelletized to obtain rough pellets of the liquid crystal polyester resin composition.

[0373] In addition, pellets of the liquid crystal polyester resin composition were produced while using a water-sealed vacuum pump (manufactured by Shinko Seiki Co., Ltd., "SW-25") to degas the vacuum outlet of the twin-screw extruder. .

[0374] Then, using a rotary particle separator with a sieve size of 2 mm (rotary particle separator "M2 type / ST" manufactured by Kubo...

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Abstract

The invention relates to a particle mixture. The particle mixture comprises particles of a liquid crystal polyester resin composition and fine powder taking an organic material as a forming material,wherein the liquid crystal polyester resin composition contains a liquid crystal polyester resin and an inorganic filler, the volume average particle diameter of the fine powder is 10-200 [mu]m, and the content of the fine powder is 10-2000 ppm with respect to the total mass of the particle mixture.

Description

technical field [0001] The invention relates to particle mixtures and injection moldings. [0002] This application claims priority based on Japanese Patent Application No. 2019-93682 filed in Japan on May 17, 2019, and the content thereof is incorporated herein. Background technique [0003] Generally, liquid crystal polyesters are called melt liquid crystal type (thermotropic liquid crystal) polymers, and due to their specific behavior, they are extremely excellent in melt fluidity, and have heat deformation resistance of 300° C. or higher depending on the structure. Liquid crystal polyester exhibits high fluidity and high heat resistance, and is used in moldings for automotive parts, OA parts, and heat-resistant tableware, mainly electronic parts. In recent years, the miniaturization and thinning of electronic equipment are moving towards, among which, in electronic components such as connectors, the trend of miniaturization and thinning is particularly significant, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08K7/14C08K3/34C08K5/098C08K13/04B29C45/00
CPCC08K7/14C08K3/34C08K5/098C08K13/04B29C45/00C08L2201/08C08L67/00C08K3/013C08K3/346B29B9/14B29B13/10B29B2009/125B29B9/06B29B9/16B29B13/02B29B7/007B29B7/90B29B7/38B29B9/12B29B7/726C08L67/03B29B11/16B29K2667/00B29K2105/16B29C45/0001B29C2791/002B29K2067/00B29K2105/0079B29K2105/251C09K19/3809
Inventor 原节幸杉山贵之
Owner SUMITOMO CHEM CO LTD
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