Aromatic polyesters of 9,9-bis-(4-hydroxyphenyl)-fluorene, phthalic acids and phosphorus halides
US4247681A · kind A · utility
2Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1979 |
| Grant date | Jan 27, 1981 |
| Priority date | — |
| Expiry date | Jul 17, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/6926
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the preparation of aromatic polyesters which are characterized particularly by high-temperature stability and difficult inflammability and which show, in addition, a low development of heat and a high char yield in combustion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.