Liquid crystal polyester composition and resin molded article using liquid crystal polyester composition

A technology of resin molded body and liquid crystal polyester, which is applied in the field of liquid crystal polyester composition and resin molded body to achieve the effect of excellent crack resistance and excellent warpage resistance

Active Publication Date: 2022-05-10
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Warping after reflow soldering heating due to residual stress (internal stress) in the enlarged CPU socket may become a problem
In addition, warping of large CPU sockets may also become a problem when molding using the above-mentioned resins

Method used

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  • Liquid crystal polyester composition and resin molded article using liquid crystal polyester composition
  • Liquid crystal polyester composition and resin molded article using liquid crystal polyester composition
  • Liquid crystal polyester composition and resin molded article using liquid crystal polyester composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0190] Hereinafter, an example of the present invention will be described, but the present invention is not limited to this example. The physical properties of the liquid crystal polyester were measured by the following methods.

[0191]

[0192] Using a flow tester (manufactured by Shimadzu Corporation, CFT-500 type), about 2 g of liquid crystal polyester is filled into the drum of a mold having a nozzle with an inner diameter of 1 mm and a length of 10 mm. 2 ) under a load at a rate of 4° C. / min to melt the liquid crystalline polyester and extrude it from a nozzle, and measure the temperature at which a viscosity of 4800 Pa·s (48000 poise) is exhibited.

[0193]

[0194] Liquid crystal polyester was produced by the following method.

[0195] At first, drop into and give the structural unit (A 1 ) of p-hydroxybenzoic acid 994.5g (7.2 moles), giving the structural unit (C 1 ) of 4,4'-dihydroxybiphenyl 446.9g (2.4 moles), giving the structural unit (B 1 ) of terephthali...

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Abstract

A liquid crystal polyester composition comprising liquid crystal polyester, a hollow filler, and a fibrous filler with a number average fiber length of 20 μm or more and less than 190 μm.

Description

technical field [0001] The present invention relates to a liquid crystal polyester composition and a resin molded article using the liquid crystal polyester composition. [0002] This application claims priority based on Japanese Patent Application No. 2016-164026 for which it applied in Japan on August 24, 2016, and uses the content here. Background technique [0003] As a connector for electronic components, for example, a CPU socket is known. The CPU socket is a connector for detachably attaching a CPU (Central Processing Unit) to an electronic circuit board. The CPU socket can be formed of resin excellent in fluidity, heat resistance, and the like, for example. As such a resin, it is known that a liquid crystal polyester can be used. However, when these resins are used for molding, cracks are likely to occur, and the occurrence of such cracks may be a problem. [0004] The CPU socket has a plurality of pin insertion holes corresponding to the connection pins of the C...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C08L67/04C08K7/02C08K7/22
CPCC08K7/02C08K7/22C08L67/04
Inventor藤田泰之
OwnerSUMITOMO CHEM CO LTD