Melt-processable polyester capable of forming an anisotropic mel

Details Melt-processable polyester capable of forming an anisotropic mel Melt-processable polyester capable of forming an anisotropic mel

1990-04-04

1991-05-14

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528176, 528193, 528271, 528272, C08G 6302, C08G 6318, C08G 6300

Patent

active

050157221

ABSTRACT:
The novel polyester of the present invention is melt processable and is capable of forming an anisotropic melt phase. The polyester includes a relatively low concentration of 6-oxy-2-naphthoyl moiety. Other key moieties are 4-oxybenzoyl moiety, terephthaloyl moiety, 1,4-dioxyphenylene moiety, and 4,4'-dioxybiphenyl moiety. The presence of the 1,4-dioxyphenylene moiety in the specified concentration in combination with the other moieties surprisingly has been found to be capable of advantageously lowering the melting temperature of the resulting polyester while making possible the substantial maintenance of a highly attractive heat deflection temperature in molded articles formed from the same. Fibers which exhibit a relatively high modulus also may be formed.

REFERENCES:
patent: 3637595 (1972-01-01), Cottis et al.
patent: 4219461 (1980-08-01), Calundann
patent: 4299756 (1981-11-01), Calundann
patent: 4318841 (1982-03-01), East et al.
patent: 4370466 (1983-01-01), Siemionko
patent: 4473682 (1984-09-01), Calundann et al.
patent: 4614789 (1986-09-01), Dicke et al.
patent: 4684712 (1987-08-01), Ueno et al.
patent: 4746694 (1988-05-01), Charbonneau et al.

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