Soluble polyimide resin, process for preparing the same, and polyimide resin solution composition
US6100365A · kind A · utility
Inventors
Key dates
| Filing date | Apr 12, 1999 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | Apr 12, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L79/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a novel soluble polyimide resin which is superior in solubility in solvents and transparency, which is useful particularly in electronics and optronics fields, and which has good processability; a process for production of the resin; and a solution composition of the resin. A soluble polyimide resin containing, as part or the whole of the diamine units, a 2,5(or 6)-bis(aminomethyl)bicyclo[2.2.1]heptane and having a light transmittance of 60% or more in a range of wavelength larger than 400 nm in an ultraviolet-visible light spectrum measured for a film of 10-.mu.m thickness; a process for production of the resin; and a solution composition of the resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.