The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 1992
Filed:
Jan. 04, 1991
Dinesh N Khanna, West Warwick, RI (US);
William R Lee, East Providence, RI (US);
Hoechst Celanese Corporation, Somerville, NJ (US);
Abstract
Nitro dinitro and diamino compounds having the formula: ##STR1## wherein A is selected from the group consisting of SO.sub.2 ; O, S, CO, C.sub.1 to C.sub.6 alkylene, perfluoroalkylene or perfluoroarylalkylene having from 1 to 10 carbon atoms, and a carbon-carbon bond directly linking the two aromatic groups, R is selected from the group consisting of hydrogen, hydroxy and C.sub.1 to C.sub.4 alkoxy, and R' is selected from the group consisting of NO.sub.2 and NH.sub.2. In the most preferred embodiment, the A linking group is selected from hexafluoroisopropylidene or 1-phenyl-2,- 2,2-trifluoroethane, and R is hydroxy. The compounds of the present invention, where R' is NH.sub.2, may be used as crosslinking agents for epoxy resins and for unsaturated elastomers, or as a reactant monomer with an organic diacid or dianhydride co-reactant monomer in the preparation of polyamide, polyimide, polyamide-imide and polybenzoxazole polymers having superior thermal and mechanical properties.