Cholesteric liquid crystal polyester containing optically active

Details Cholesteric liquid crystal polyester containing optically active Cholesteric liquid crystal polyester containing optically active

1990-03-23

1992-03-03

Stoll, Robert L.

Compositions

Liquid crystal compositions

528176, 528193, 528194, 528272, 528274, 528286, 25229962, 25229966, C09K 1952, C09K 1912, C08G 6300, C08G 6302

Patent

active

050930257

ABSTRACT:
A cholesteric liquid crystal polyester high molecular weight polymer has, as structural units, (1) --O--Ar--CO--, (2) camphoric acid, (3) --O--R.sub.1 --O-- and (4) --CO--R.sub.2 --CO--, wherein Ar is a bivalent aromatic ring having 6-12 carbon atoms, and R.sub.1 and R.sub.2 are bivalent aromatic rings having 6-18 carbon atoms, a bivalent aliphatic chain having 2-16 carbon atoms, or a bivalent alicyclic ring having 6-18 carbon atoms. The liquid crystal polyester exhibits high physical properties, including strength and elasticity modulus, with reduced mechanical anisotropy, while exhibiting selective visible light reflection under certain conditions.

REFERENCES:
patent: 4390681 (1983-06-01), Deex
patent: 4493532 (1985-01-01), Kaneko et al.
patent: 4528113 (1985-07-01), Imazeki et al.
patent: 4588517 (1986-05-01), Kaneko et al.
patent: 4652626 (1987-03-01), Orii et al.
patent: 4737310 (1988-04-01), Imazeki et al.
"3rd Bilateral Macromolecular Symposium" Mar. 26-31, 1988, pp. 8 and 9, 20 and 21.

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