High purity aromatic polyesters
US5295040A · kind A · utility
0Cited by
17References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1992 |
| Grant date | Mar 15, 1994 |
| Priority date | — |
| Expiry date | Feb 13, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
This invention provides oligomer-free polyesters that consist essentially of repeating, interpolymerized units derived from isophthalic acid and/or terephthalic acid, and 9,9-bis-(4-hydroxyphenyl)-fluorene, a process for making such polyesters and articles comprising said polyesters such as electrical capacitors, optical films and fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.