C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/191, 402/205
C08G 63/60 (2006.01) C08G 63/66 (2006.01) C08G 63/68 (2006.01) C08G 63/682 (2006.01)
Patent
CA 1133188
ABSTRACT OF THE DISCLOSURE A novel polyester is provided which has been found to exhibit an anisotropic melt phase at a temperature which enables it readily to undergo melt processing to form quality fibers, molded articles, etc. The polyester of the present invention is different in character than polyesters of the prior art and includes as essential ingredients moieties derived from para-hydroxy benzoic acid, 1,2-bis(para-carboxy phenoxy)ethane, terephthalic acid, and substituted hydroqui- none in the proportions indicated. The polyester of the present invention generally can be more enconomically produced than polyesters of the latter three moiesties (two of which are relatively expensive) while surprisingly yielding an aniso- tropic melt of relatively low viscosity at a desirable tem- perature for melt processing in spite of the substantial concentration of relatively stiff para-oxbenzoyl moieties which contribute to the overall nature of the resulting polyester. In a preferred embodiment the polyester is capable of under- going melt processing at a temperature below approximately 300°C., and in a particularly preferred embodiment at a temperature below approximately 290°C. (e.g., with standard equipment commonly used to melt process polyethylene terephthalate).
344927
Langley Jeffrey T.
Mininni Robert M.
Fiber Industries Inc.
Smart & Biggar
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