Polyimides, a process for their preparation and their use, and tetracarboxylic acids and tetracarboxylic acid derivatives
US4914182A · kind A · utility
16Cited by
6References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1987 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | Jul 6, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S522/905
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyimides which essentially consist of 0.1 to 100 mol % of at least one structural element of the formula I ##STR1## and 99.9 to 0 mol % of at least one structural element of the formula II and/or III ##STR2## in which Z and Z' are a tetravalent aromatic radical, Q' is a trivalent aromatic radical, X and X' are a divalent radical of an organic amine, are autophotocrosslinkable. They are suitable for the production of protective films and photographic relief images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.