Thermoplastic aromatic polyetherketones
US4320224A · kind A · utility
128Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1978 |
| Grant date | Mar 16, 1982 |
| Priority date | — |
| Expiry date | Oct 31, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A30/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Tough crystalline thermoplastic aromatic polyetherketones containing the repeat units ##STR1## alone or in conjunction with other repeat units especially ##STR2## and having an inherent viscosity IV of at least 0.7, preferably at least 0.8. The polymers may be made by condensation of hydroquinone, 4,4'-difluorobenzophenone and an alkali metal carbonate or bicarbonate in the presence of an aromatic sulphone solvent, e.g. diphenylsulphone, at 150.degree.-400.degree. C. The polymers are very useful for wire coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.