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Aromatic liquid crystal polyester liquid composite

A technology of liquid crystal polyester and composition, which is applied in the field of producing the film, and can solve problems such as poor mechanical properties and strong corrosion

Inactive Publication Date: 2002-02-20
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventionally known aromatic liquid crystalline polyester films obtained by extrusion have the problem of having inferior mechanical properties in their transverse direction (TD) compared to the longitudinal direction (MD) (flow direction), i.e., having Very large anisotropy due to the clear orientation of the liquid crystalline polyester in the direction of extrusion
However, these solvents have problems such as strong corrosion and are not necessarily easy to handle

Method used

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  • Aromatic liquid crystal polyester liquid composite
  • Aromatic liquid crystal polyester liquid composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] To 9.5 g of 4-chlorophenol was added 0.5 g of the powdery aromatic liquid crystal polyester obtained in Synthesis Example 1. The mixture was heated to 120°C and the solution was observed to be clear and complete dissolution. The solution was cast on a glass plate and the solvent was evaporated in a ventilated oven at 70°C for 1 hour. Thus, a transparent film having a thickness of 30 µm was obtained. The pattern of orientation was measured with a simple molecular orientation analyzer (MOA-5012, manufactured by Oji Scientific Instruments), and it was found that the anisotropy ratio of longitudinal (molecular flow direction) MD and transverse TD was 1, which indicated that the film had no anisotropy. opposite sex.

Embodiment 2

[0097] To a mixed solvent of 6 g / 4 g 4-chlorophenol / 1,1,2,2-tetrachloroethane was added 0.1 g of the powdery aromatic liquid crystal polyester obtained in Synthesis Example 1. The mixture was heated to 100°C and the solution was observed to be clear and complete dissolution. The solution was cast on a glass plate and the solvent was evaporated in a ventilated oven at 70°C for 1 hour. Thus, a transparent and flexible film having a thickness of 30 µm was obtained. The pattern of orientation was measured with a simple molecular orientation analyzer (MOA-5012, manufactured by Oji Scientific Instruments), and it was found that the anisotropy ratio of longitudinal (molecular flow direction) MD and transverse TD was 1, which indicated that the film had no anisotropy. opposite sex.

Embodiment 3

[0099] To 9 g of 4-chlorophenol was added 1 g of the powdery aromatic liquid crystal polyester obtained in Synthesis Example 1. The mixture was heated to 120°C and the solution was observed to be clear and complete dissolution. To this solution was added 1 g of silica filler (1-FX, commercially available from Tatsumori) and the solution was stirred and defoamed, thereby forming an insulating resin solution composition.

[0100] The insulating resin solution composition was cast on a glass plate. The solvent was evaporated in a ventilated oven at 100°C for 1 hour, followed by heat treatment at 190°C for 1 hour. Thus, a film having a thickness of 30 µm was obtained. The orientation pattern was measured with a simple molecular orientation analyzer (MOA-5012, manufactured by Oji Scientific Instruments), and the ratio of longitudinal (molecular flow direction) MD and transverse TD was calculated. The results are shown in Table 1.

[0101] In addition, the coefficient of linear ...

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Abstract

The invention relates to an aromatic liquid-crystalline polyester solution composition comprising 100 parts by weight of a solvent (A) and 0.01 to 100 parts by weight of an aromatic liquid-crystalline polyester (B), wherein the solvent (A) is a solvent containing 30% by weight or more of a chlorine-substituted phenol compound represented by the following general formula (I): wherein A represents a hydrogen atom, a halogen atom or a tri-halogenated methyl group, and i represents an integer of 1 or more and 4 or less, a film obtained from the aromatic liquid-crystalline polyester, and a process for producing the film.

Description

technical field [0001] The present invention relates to an aromatic liquid crystal polyester solution composition, a film with small anisotropy obtained by casting the composition, and a method for producing the film. Background technique [0002] Since aromatic liquid crystalline polyesters have excellent high-frequency performance and low hygroscopicity, they are expected to be used as substrates in the electronic field. However, conventionally known aromatic liquid crystalline polyester films obtained by extrusion have the problem of having inferior mechanical properties in their transverse direction (TD) compared to the longitudinal direction (MD) (flow direction), i.e., having The large anisotropy is due to the obvious orientation of the liquid crystalline polyester in the direction of extrusion. [0003] Many methods for producing aromatic liquid crystal polyester films are known, in which a solution composition is prepared by dissolving aromatic liquid crystal polyes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/08B32B27/36C08J3/09C08J5/18C09D167/00C09K17/52H05K1/00H05K3/46
CPCB32B15/08H05K3/4676B32B27/36C08J3/095H05K2201/0209H05K3/4661C09D167/00H05K2201/0141C08J2367/03C08J5/18Y10T428/31786C09K17/52Y10T428/24917C08J2367/00
Inventor 冈本敏平川学
Owner SUMITOMO CHEM CO LTD