Reactive polyimides for addition to thermosetting resins, and process for preparation of same
US5104970A · kind A · utility
1Cited by
5References
9Claims
0Family size
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Key dates
| Filing date | Dec 20, 1990 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Dec 20, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L63/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Thermoplastics containing imide groups in the polymer backbone, soluble in an unmodified state, are rendered reactive with thermosetting resins by partial conversion of the polymer backbone to provide reactive groups. The modified polymer may be added as microspheres to a thermosetting resin, subsequently crosslinking therewith supressing solvent sensitivity in a fiber reinforced matrix composite comprising the toughened resin as the matrix therefore. The modified polymer microspheres retain their physical identity in the cured composite structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.