Polyamide, polyimide, and polyamide-imide polymers of diamino-t-butyltoluene
US4963648A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1990 |
| Grant date | Oct 16, 1990 |
| Priority date | — |
| Expiry date | Apr 9, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Resinous condensation polymers of polycarboxylic acid compounds and aromatic diprimary amines comprising diamino-t-butyltoluene are described. In particular, film-forming polyamides, polyimides and polyamide-imides and their copolymers made using diamino-t-butyltoluene which have amino groups meta or para to each other on a benzene ring are described. These polymers have some solubility in organic solvents such as N-methylpyrrolidone, a high glass transition temperature, excellent thermal stability, and are useful in films, fibers and composites, and in the electronics industry as electrical component substrates, protective coatings, interlevel dielectrics and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.