Imide group-containing aromatic polyamides, process for their preparation and use thereof as molding materials
CA 1296469 C · Owner: Huls Aktiengesellschaft · Inventors: Bartmann, Martin; Schmidt, Friedrich-Georg; Finke, Jurgen
Overview
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An imide group-containing aromatic polyamide obtained, by polycondensation of, A) an aromatic diamine of the general formula H2N-Ar-O?Ar'-X-Ar'??O-Ar-NH2, wherein Ar and Ar' are a m- or p-phenylene group X is -SO2- or -, CO- and m is 0 or 1, with at least one aromatic dicarboxylic acid B) selected from the group consisting of B1) a mixture comprising 40 to 100 mole % of an acid of the structure, and 60 to 0 mole % of an acid of the structure in which n is 0-4 and R is selected from the group consisting of a) an alkyl group having 1-6 carbon atoms b) an unsubstituted phenyl or an alkyl- or aryl substituted phenyl group, c) an alkoxy group having 1-6 atoms d) a phenoxy group, in which 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 February 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 2009.
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