Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A liquid crystal polyester composition and a molded body formed by the same

A technology of liquid crystal polyester and composition, which is applied in the field of liquid crystal polyester composition and molded body formed from the composition, which can solve problems such as poor appearance, easy to be obvious, color spots, etc., and achieve the reduction of color change, durability High foaming property and maintenance of mechanical strength

Active Publication Date: 2013-10-23
SUMITOMO CHEM CO LTD
View PDF9 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, as a whole molded article, there is a problem that unevenness occurs and appearance defects tend to be conspicuous.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A liquid crystal polyester composition and a molded body formed by the same
  • A liquid crystal polyester composition and a molded body formed by the same
  • A liquid crystal polyester composition and a molded body formed by the same

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0116] Add 994.5 g (7.2 moles) of p-hydroxybenzoic acid, 299.1 g (1.8 moles) of terephthalic acid, and 99.7g (0.6 mol), 446.9g (2.4 mol) of 4,4'-dihydroxybiphenyl, 1347.6g (13.2 mol) of acetic anhydride and 0.2g of 1-methylimidazole, while stirring under nitrogen flow, use The temperature was raised from room temperature to 150° C. in 30 minutes, and refluxed at 150° C. for 1 hour. Next, 0.9 g of 1-methylimidazole was added, and while distilling off by-produced acetic acid and unreacted acetic anhydride, the temperature was raised from 150°C to 320°C over 2 hours and 50 minutes, and held until a rise in torque was confirmed at 320°C After that, the reaction mixture was taken out from the reactor and cooled to room temperature. The obtained solid was pulverized with a pulverizer to obtain a powdery prepolymer. The prepolymer was heated from room temperature to 250°C in nitrogen atmosphere for 1 hour, heated from 250°C to 285°C in 5 hours, kept at 285°C for 3 hours for solid-s...

Embodiment 1～8、 comparative example 1～8

[0119]The liquid crystal polyester obtained in Production Example 1 was blended with the following fillers and coloring materials at the ratios shown in Tables 1 and 2, and a twin-screw extruder PCM30 manufactured by Ikegai Iron Works Co., Ltd. was used. Granulation was carried out at 340° C. to obtain a liquid crystal polyester composition. The obtained composition was molded at 350° C. using an injection molding machine PS40E5ASE manufactured by Nissei Plastic Industry Co., Ltd. to obtain a size of 40 mm (short side)×60 mm (long and short side)×thickness (maximum thickness portion D1 = 3 mm, Minimum thickness part D2 = 1mm) figure 1 The molded body of the plate-shaped test piece with height difference shown. Tables 1 and 2 show the color tone of the minimum thickness portion D2 (thickness 1 mm) and maximum thickness portion D1 (thickness 3 mm) of the molded article.

[0120] Glass fiber: Glass fiber PF70E-001 of Nitto Bosho Co., Ltd. with a number average fiber diameter of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
particle sizeaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention provides a liquid crystal polyester composition and a molded body formed by the same. The molded body has reduced color variation caused by thickness difference of positions, maintained mechanical strength, and high foaming resistant characteristic. The liquid crystal polyester comprises, by weight, 100 parts of liquid crystal polyester, from 0.01 to 5 parts of titanium oxide and / or mixed metal oxides, and from 0.01 to 3 parts of ultramarine. The mixed metal oxides include titanium oxide used as a main component and a compound which is used as an auxiliary component and which contains one or more than two metallic elements selected from a group including antimony, nickel, chromium, iron, zinc, molybdenum, and tungsten.

Description

technical field [0001] The present invention relates to a liquid crystal polyester composition and a molded article formed from the composition. Background technique [0002] Along with the miniaturization and thinning of electronic and electrical products, the miniaturization of connectors used therein is also progressing. As the molding material of the connector, liquid crystal polyester is preferably used from the viewpoint of excellent melt fluidity, heat resistance, and mechanical properties. [0003] Due to the rigidity of the molecules of the liquid crystal polyester, the liquid crystal polyester in the molten state forms multiple domains without causing mutual entanglement between the molecules. oriented behavior. Therefore, the liquid crystal polyester is excellent in flow characteristics and heat resistance. [0004] In use in a high-temperature atmosphere in which the heat resistance of the liquid crystalline polyester is effectively utilized, it is generally p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08L67/03C08L67/04C08K13/04C08K7/14C08K3/22H01R13/46
Inventor 原节幸齐藤慎太郎
Owner SUMITOMO CHEM CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com