Optically anisotropic melt forming aromatic copolyesters based on t-butyl-4-hydroxybenzoic acid
CA 1307073 C · Owner: Connolly, Mark Stephen · Inventors: Connolly, Mark Stephen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel copolyesters derived from (a) aromatic diols, (b) dicarboxylic acids and (c) aromatic hydroxycarboyxlic acids, in which the aromatic hydroxycarboyxlic acid component (c) comprises 15 to 60 mole % of the copolyester and in which t-butyl- 4-hydroxybenzoic acid constitutes 25 to 100 mole % of the aromatic hydroxycarboxylic acid component (c) are, disclosed. These copolyesters are anisotropic And fabricable in the melt. They generally can be processed using conventional thermoplastic shaping techniques at temperatures below 350 degrees C. into moldings, fibers and films which have outstanding mechanical properties. AD-5594 35
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted September 1, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 1, 2009.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.