Liquid crystalline copolymer

Details Liquid crystalline copolymer Liquid crystalline copolymer

1987-09-01

1990-07-24

Lipman, Bernard

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5253305, 525375, 525376, 525380, 526258, 526266, 526280, 526284, C08F 832

Patent

active

049436171

ABSTRACT:
A liquid crystalline copolymer contains a comonomer to which a radical ##STR1## is bonded, where X is a chemical bond, O or NR.sup.1, Y is a chemical bond or --CO--, R.sup.1 is hydrogen or C.sub.1 -C.sub.4 -alkyl and A is a linear or branched C.sub.2 -C.sub.20 -alkylene group which may be interrupted by --O-- or ##STR2## The liquid crystalline copolymers have very good lightfastness, high dichroism and a high absorption.

REFERENCES:
patent: 4358391 (1982-11-01), Finkelmann et al.
patent: 4410570 (1983-10-01), Kreuzer et al.
patent: 4631328 (1986-12-01), Ringsdorf et al.
patent: 4657842 (1987-04-01), Finter et al.
Hans Kelker/Rolf Hatz, Handbook of Liquid Crystals, Verlag Chemie 1980; pp. 87-113.

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