Impregnating solutions based on at least one reactive thermoplastic poly (imide-amide) oligomer and a coreactant, which can be used especially for the production of preimpregnated intermediate articles
US5470920A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1993 |
| Grant date | Nov 28, 1995 |
| Priority date | — |
| Expiry date | Oct 1, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L79/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to impregnating solutions consisting: PA1 of an active principle A+B in which: A denotes at least one thermoplastic poly(imide-amide) oligomer functionalized at the chain ends with an alkenyloxy, maleimido or nadimido group, B denotes a coreactant chosen from: B1=an imide ingredient, B2=an acrylate ingredient, B3=an alkenylphenol ingredient, B4=a novolac resin, B5=a vinyl ingredient, B6=an epoxy resin, B7=an amino ingredient and B8=a mixture of a number of ingredients B1 to B7; PA1 and of one or a number of aprotic polar solvent(s), the concentration of the active principle in the solution being between 2 and 80% by weight. These solutions are employed especially for the production of preimpregnated intermediate articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.