Polyester of 6-hydroxy-2-naphthoic acid and meta-hydroxy benzoic

Details Polyester of 6-hydroxy-2-naphthoic acid and meta-hydroxy benzoic Polyester of 6-hydroxy-2-naphthoic acid and meta-hydroxy benzoic

1980-07-15

1982-06-29

Cockeram, H. S.

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...

528190, 528193, 528271, C08K 513, C08G 6318

Patent

active

043371906

ABSTRACT:
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 anisotropic 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.degree. C., and in a particularly preferred embodiment at a temperature of approximately 280.degree. to 320.degree. C.

REFERENCES:
patent: 3767621 (1973-10-01), Suzuki et al.
patent: 3890256 (1975-06-01), McFarlane et al.
patent: 4130545 (1978-12-01), Calundann
patent: 4161470 (1979-07-01), Calundann
Gilkey et al., J. Appl. Polym. Sci., vol. II, No. 5, pp. 198-202.
Bier, Polymer, vol. 15, pp. 527-535.
Cottis, Modern Plastics, Jul. 1975, pp. 62-63.
Storm et al., Coating Plast. Preprint, vol. 34, No. 1, pp. 194-197.
Jackson et al., 30th Ann. Tech. Conf. 1975, Soc. Plastics Ind., Sec. 17-D, pp. 1-4.

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