Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1978-02-15
1980-01-22
Lee, Lester L.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 40P, 528190, 528193, 528206, 528271, C08G 6318, C08G 6360
Patent
active
041849965
ABSTRACT:
A wholly aromatic polyester is provided which unlike the aromatic polyesters normally encountered in the prior art is not intractable or difficultly tractable and readily undergoes melt processing with ease. The aromatic polyester of the present invention consists essentially of the recurring units (a) p-oxybenzoyl moiety, (b) 2,6-dioxynaphthalene moiety, and (c) terephthaloyl moiety, and is free of units which possess ring substitution. The resulting polyester exhibits a melting point below approximately 325.degree. C., preferably below 300.degree. C., and most preferably below approximately 290.degree. C. The ability of the wholly aromatic polyester to readily undergo melt processing can be attributed to its atypical inherent propensity to form a thermotropic melt phase at relatively low temperatures. The wholly aromatic polyester may be formed by a variety of procedures including a slurry polymerization technique (as defined) or a melt polymerization technique.
REFERENCES:
patent: 2600376 (1952-07-01), Caldwell
patent: 3039994 (1962-07-01), Gleim
patent: 3778410 (1973-12-01), Kuhfuss
patent: 3884876 (1975-05-01), Cottis et al.
patent: 3890256 (1975-06-01), McFarlane et al.
Celanese Corporation
Lee Lester L.
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