Aromatic carboxamide-sulphonamide polycondensates
US3931119A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1973 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | Sep 10, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/32
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
New aromatic polyamide-sulphonamides consisting essentially of recurring units of the formula: EQU -- CO -- Ar.sub.1 -- CONH -- Ar.sub.2 -- SO.sub.2 NH -- Ar.sub.3 -- (SO.sub.2 NH -- Ar.sub.4).sub.n -- NH -- in which each of the Ar radicals, which may be identical or different, represents a divalent aromatic radical containing one or more benzene rings, n is 0 or an integer equal to or greater than 1 and the arrow above the --SO.sub.2 NH-- groups indicates that these groups can be reversed to give --NHSO.sub.2 -- groups. These new polymers are infusible products which are resistant to high temperatures and which can be converted into yarns and films.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.