High purity aromatic polyesters
US4967306A · kind A · utility
13Cited by
11References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 5, 1989 |
| Grant date | Oct 30, 1990 |
| Priority date | — |
| Expiry date | May 5, 2009 |
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.