Salts of polybenzazole monomers and their use
US5276128A · kind A · utility
27Cited by
9References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1991 |
| Grant date | Jan 4, 1994 |
| Priority date | — |
| Expiry date | Oct 22, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/32
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Salts that contain AA-PBZ monomer ions and BB-PBZ monomer ions can be precipitated from an aqueous solution by contacting soluble salts of the monomers in an aqueous solution. The monomer salt can be polymerized by ordinary techniques to form polybenzazole polymers without the need for devolatilization and with very accurate stoichiometric control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.