Aromatic polyimide compositions of high solubility and their uses
US4736015A · kind A · utility
16Cited by
5References
51Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1982 |
| Grant date | Apr 5, 1988 |
| Priority date | — |
| Expiry date | Oct 19, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Aromatic polyimide compositions, useful in particular for manufacturing adhesive materials, varnishes and films withstanding high temperatures, having a high solubility in organic solvents, particularly polar solvents and which are manufactured by reacting, in such a solvent, a tetraester or diacid-diester of benzhydrol 3,3', 4, 4' tetracarboxylic acid with an aromatic diamine for a sufficient time to obtain a polycondensation reaction product having an inherent viscosity at 30.degree. C., at a concentration of 5 g/liter in N-methyl pyrrolidone, ranging from 0.1 to 2 dl/g.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.