C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/314, 400/800
C08G 63/06 (2006.01) C08L 67/04 (2006.01)
Patent
CA 1174796
POLYESTER OF 6-HYDROXY-2-NAPHTHOIC ACID AND META-HYDROXY BENZOIC ACID CAPABLE OF READILY UNDERGOING MELT PROCESSING Abstract of the Disclosure A novel polyester is provided which has been found to exhibit an optically anisotropic melt phase at a temperature which enables it readily to undergo melt processing to form quality molded articles, etc. The polyester of the present invention is formed primarily of recurring 6-oxy-2-naphthoyl and m-oxybenzoyl moieties in the proportions indicated. The hydrogen atoms present upon the aromatic rings of these moieties optionally may be at least partially substituted (as described). Also, minor amounts of other ester-forming moieties may be included in the polyester so long as the optically aniso- tropic character in the melt and ease of melt processability are retained. In a preferred embodiment the wholly aromatic polyester is capable of undergoing melt processing at a temperature below approximately 370°C., and in a particularly preferred embodiment at a temperature of approximately 280 to 320°C. -1-
381711
Celanese Corporation
Smart & Biggar
LandOfFree
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