Transparent aromatic polyimide
US4696994A · kind A · utility
83Cited by
2References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1985 |
| Grant date | Sep 29, 1987 |
| Priority date | — |
| Expiry date | Dec 16, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/1064
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A transparent aromatic polyimide produced by polymerization and imidation of an aromatic tetracarboxylic acid containing as a principal component biphenyltetracarboxylic acid and an aromatic diamine containing as a principal component bis(aminophenoxy-phenyl)sulfone of the formula (I) or bis(aminophenoxy-phenyl)propane of the formula (II): ##STR1##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.