Liquid-crystalline polyester and solution composition...

Details Liquid-crystalline polyester and solution composition... Liquid-crystalline polyester and solution composition...

2007-01-12

2009-06-23

Visconti, Geraldina (Department: 1795)

Compositions

Liquid crystal compositions

C430S020000, C430S270100, C428S001100, C349S117000, C252S299600

Reexamination Certificate

active

07550093

ABSTRACT:
A liquid-crystalline polyester for film having small linear expansibility and high flexibility is provided. The polyester may have structural units —O—Ar1-CO—, —NH—Ar2-X—, —CO—Ar3-CO— and —CO—Ar4-Z-Ar5-CO— wherein Ar1 represents 1,4-phenylene, 2,6-naphthylene or 4,4′-biphenylene, Ar2 represents 1,4-phenylene or 1,3-phenylene, X represents —O— or —NH—, Ar3 represents 1,4-phenylene, 1,3-phenylene or 2,6-naphthylene, Ar4 and Ar5 independently represent 1,4-phenylene, 2,6-naphthylene or 4,4′-biphenylene, and Z represents —O—, —SO2— or —CO—, in which the amount of monomer (1) is 30-80% by mol, the amount of monomer (2) is 10-35% by mol, the total amount of monomers (3) and (4) is 10-35% by mol and the amount of monomer (4) is 1% by mol or larger.

REFERENCES:
patent: 5418281 (1995-05-01), Yung et al.
patent: 7022807 (2006-04-01), Okamoto et al.
patent: 2007/0092709 (2007-04-01), Okamoto et al.

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