Maro Publications

Polyester Liquid Crystal Materials

Notes

*8/7/2012

Maro Topics

Comments

Patents with Abstracts

Polyester Liquid Crystal Polymers

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Notes

“Among the engineering plastics, thermotropic liquid-crystalline polyester resin (hereinafter called liquid-crystalline polyester resin or LCP) has the following excellent properties and is especially expected to be suitable for manufacturing devices which use high-frequency signals:

(1) excellent dielectric properties: the relative permittivity (.di-elect cons.r) is constant in the frequency regions employed and dielectric loss tangent (tan .delta.) is small,

(2) good physicality: mechanical properties including low-expansion property (dimensional stability), heat-resistance, flame-retardancy and rigidity are good, and

(3) good molding flowability: which allows processing of molded articles having down-sizing and thinner parts.

Among the liquid-crystalline polyester resins, liquid-crystalline polyesters comprising a large amount of a repeating unit derived from 6-hydroxy-2-naphthoic acid which is one of aromatic hydroxy carboxylic acid have been recently proposed in terms of their good heat-resistance and dielectric properties.”

[Yonezawa and Asahara, US Patent 8,231,807 (7/31/2012)]

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Interested!!
Bookmark this page to follow future developments!.
(RDC 6/5/2012)

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
Tel: 610 363 9920
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E-Mail: cornelrd@bee.net  

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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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* Date of latest addition; date of first entry is 8/7/2012.