Polyester of 2,6-naphthalene dicarboxylic acid, 2,6-dihydroxy na

Details Polyester of 2,6-naphthalene dicarboxylic acid, 2,6-dihydroxy na Polyester of 2,6-naphthalene dicarboxylic acid, 2,6-dihydroxy na

1982-07-06

1983-03-01

Lee, Lester L.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524599, 524601, 528190, 528193, 528194, 528271, C08G 6318

Patent

active

043755305

ABSTRACT:
A novel wholly aromatic polyester is provided which contains specified concentrations of recurring 2,6-dicarboxynaphthalene moiety, 2,6-dioxynaphthalene moiety, terephthaloyl moiety, and 1,4-dioxybenzene moiety. It has been found that such polyester is capable of exhibiting an anisotropic melt phase which is readily melt processable to form quality fibers, films, molded articles, etc. The absence in the polymer chain of moieties derived from hydroxy acids has been found to yield a highly linear more extended polymer chain along the polyester which contributes to the stiffness characteristics of shaped articles comprising the same.

REFERENCES:
patent: 3935166 (1976-01-01), Kanai et al.
patent: 4067852 (1978-01-01), Calundann
patent: 4153779 (1979-05-01), Jackson, Jr. et al.
patent: 4169933 (1979-10-01), Jackson, Jr. et al.
patent: 4184996 (1980-01-01), Calundann
patent: 4256624 (1981-03-01), Calundann
patent: 4318841 (1982-03-01), East et al.
patent: 4318842 (1982-03-01), East et al.
patent: 4330457 (1982-05-01), East et al.
patent: 4337190 (1982-06-01), Calundann

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