Cholesteric liquid crystal copolyesters

Details Cholesteric liquid crystal copolyesters Cholesteric liquid crystal copolyesters

1986-08-28

1987-10-06

Phynes, Lucille M.

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

Synthetic resins

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

528176, 528194, C08G 6376

Patent

active

046983970

ABSTRACT:
A process for preparing a cholesteric liquid crystal copolyester consisting essentially of structural units represented by the following formula (A), (B), (C) and (D): ##STR1## which is optically active characterized in that a polyethylene terephthalate oligomer having a (B)/(A) mole ratio in the range of 1.1 to 1.8, p-acetoxybenzoic acid and 3-methyladipic acid are reacted to prepare the final cholesteric liquid crystal copolyester having an inherent viscosity of at least 0.4 dl/g.

REFERENCES:
patent: 4146702 (1979-03-01), Morris et al.
patent: 4242496 (1980-12-01), Jackson et al.
patent: 4621129 (1986-04-01), Yoshimura et al.
patent: 4652626 (1987-03-01), Orii et al.

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