Thermoplastic polyimides
US9902809B2 · kind B2 · utility
0Cited by
13References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2012 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | Jun 9, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to thermoplastic polyimides and to the synthesis thereof. The invention relates in particular to a method for manufacturing semi-aromatic thermoplastic polyimides by means of the solid-state polymerization of a solid ammonium carboxylate salt formed from an aliphatic diamine and an aromatic tetracarboxylic acid, thereby enabling powders having controlled particle sizes to be produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.