Aromatic liquid-crystalline polyester

Details Aromatic liquid-crystalline polyester Aromatic liquid-crystalline polyester

2006-03-21

2006-03-21

Acquah, Samuel A. (Department: 1711)

Stock material or miscellaneous articles

Composite

Of polyester

C528S176000, C528S190000, C528S193000, C528S194000, C528S206000, C524S401000, C428S458000

Reexamination Certificate

active

07014921

ABSTRACT:
An aromatic liquid-crystalline polyester with good moldability into a film is provided. The resulting film has small dielectric loss. The polyester comprises repeating units represented by formulae (I), (II), (III) and (IV), and the molar amounts of repeating units (I)–(IV) are 40–74.8%, 12.5–30%, 12.5–30% and 0.2–15%, respectively, wherein the molecular amounts of repeating units (III) and (IV) satisfy the relation of (III)/[(III)+(IV)]≧0.5.

REFERENCES:
patent: 5962122 (1999-10-01), Walpita et al.
patent: 6815526 (2004-11-01), Yokota et al.
patent: 2004/0152865 (2004-08-01), Okamoto et al.
patent: 0 672 721 (1995-09-01), None
patent: 08-143654 (1996-06-01), None

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