Liquid crystal polyester resin compsns. and its moulded products

A resin composition, liquid crystal polyester technology, applied in liquid crystal materials, chemical instruments and methods, etc., can solve the problems of unsuitable industrial production, unable to fully realize reproducibility, unstable performance of hollow spheres, etc.

Inactive Publication Date: 2005-04-27
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the conventional manufacture of resin compositions containing hollow spheres and their molded articles cannot achieve full reproducibility, including unstable properties due to the fracture degree of hollow spheres, and therefore, they are not suitable for industrial production

Method used

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  • Liquid crystal polyester resin compsns. and its moulded products
  • Liquid crystal polyester resin compsns. and its moulded products
  • Liquid crystal polyester resin compsns. and its moulded products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4 and comparative Embodiment 1-5

[0052] According to the composition shown in Table 1, the following components were pelletized with a twin-screw extruder (PMT 47 manufactured by IKG Corporation) having a cylinder temperature of 400° C. to obtain pellets of a liquid crystal polyester resin composition.

[0053] Liquid crystal polyester resin: Liquid crystal polyester resin (specific gravity 1.38) consists of the above structural units (A 1 ), (B 1 ), (B 2 ) and (C 1 ) in molar ratio (A 1 ): (B 1 ): (B 2 ): (C 1 )=50:23.75:1.25:25 composition, and its flow temperature is 380°C.

[0054] Glass sphere 1: glass sphere with an average particle diameter of 30 µm and a volume hollowness of 76% [trade name: Scoch Light S 60, manufactured by Sumitomo 3M Limited, true specific gravity 0.60, material specific gravity 2.50]

[0055] Glass sphere 2: a glass sphere having an average particle diameter of 40 µm and a volume hollowness of 70% [trade name: CEL-STAR PZ-6000, manufactured by Tokai Kogyo Co. Ltd., true spe...

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Abstract

Provided is a liquid crystal polyester resin composition comprising 100 parts by weight of a liquid crystal polyester resin, 2 to 50 parts by weight of hollow sphere having an average particle diameter of 5 to 500 mu m and a volume hollowness of 60 to 80%, and 0 to 40 parts by weight of inorganic fiber, wherein said liquid crystal polyester resin composition has the specific range of fracture rate of the hollow sphere. The liquid crystal polyester resin composition gives a molded product having necessary mechanical physical properties, light-weighted and excellently low thermal conductivity, with good reproducibility.

Description

technical field [0001] The present invention relates to a liquid crystal polyester resin composition and its molded articles. In particular, it relates to a liquid crystalline polyester resin composition containing hollow spheres and its molded articles. Background technique [0002] Because the liquid crystal polyester resin has good heat resistance, mechanical properties and excellent flowability in the molten state—that is, it has good processability, and the molten liquid crystal polyester resin that exhibits liquid crystallinity in the molten state (below Resins in this article refer specifically to liquid crystal polyester resins) are used in various fields, including electrical and electronic fields, as molding materials that can be precisely shaped. In recent years, in the field of electrical and electronics, there has been an increasing demand for materials that are small in size, light in weight and high in performance. Thus, for liquid crys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/04C08K7/04C08K7/14C08K7/22C08K7/26C08K7/28C08L67/00
CPCC08K7/26C08L67/00
Inventor 前田光男
Owner SUMITOMO CHEM CO LTD
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