Aromatic polyamides and their production
CA 1051594 A · Owner: Toyobo Co. · Inventors: Yamaguchi, Masayasu; Konomi, Tuyoshi; Katsuo, Kenichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, The specification discloses an aromatic polyamide comprising (1) a unit of the formula;, and (2) a unit of the formula: and being excellent in strength, rigidity and heat resistance and improved in light resistance, flexibility and wear resistance, which can be produced by polycondensation of a diamine component comprising N,N'-bis(p-aminobenzoyl)-ethylenediamine and p-phenylenediamine, the content of the N,N'-bis(paminobenzoyl)ethylenediamine being from about 0.6 to 50 mol % with a dicarboxylic acid component comprising terephthalic acid or its reactive derivative in a substantially equimolar amount to the diamine component in an amide polar solvent. The …
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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 March 27, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 27, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.