US 5110894
COPOLYMERS CONTAINING POLYBENZAZOLE MER UNITS AND POLY(AROMATIC KETONE) OR POLY(AROMATIC SULFONE) MER UNITS
Assignee
DOW CHEMICAL COMPANY, THE A CORPORATION OF DE
Filed
Jul 7, 1989
Granted
May 5, 1992
Location
MIDLAND MI US
Abstract
Difunctional monomers containing functional moieties suitable for forming azole rings and for forming aromatic ketone or sulfone moieties can be reacted in strong, non-oxidizing, dehydrating acids to form copolymers containing benzazole moieties and aromatic ketone or sulfone moieties. Those copolymers can be extruded to form fibers and films which are thermoplastic.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Jun 25, 1990
Rescinded
Dec 12, 1990
Duration
5 months
Inventor
- 1WILLIAM J. HARRIS
Record Details
- Patent number
- US 5110894
- Application
- 00737836
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records
Browse by Assignee
DOW CHEMICAL COMPANY, THE A CORPORATION OF DEBack to patent indexSource: USPTO 35 USC §181 secrecy order records