Terminally modified imide oligomer, varnish, cured products thereof, film, and imide prepreg and fiber-reinforced composite material using these
US10526450B2 · kind B2 · utility
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Key dates
| Filing date | Nov 8, 2018 |
| Grant date | Jan 7, 2020 |
| Priority date | — |
| Expiry date | Nov 8, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D7/65
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A terminally modified imide oligomer is represented by a specific formula including a 2-phenyl-4,4′-diaminodiphenylether residue or a 4-phenoxy-1,3-diaminobenzene residue. A varnish is obtained by dissolving the terminally modified imide oligomer. A cured product is obtained by heat-curing the terminally modified imide oligomer, and a film including the cured product has a tensile elongation at break of 10% or more. An imide prepreg is obtained by impregnating fibers with the varnish and then drying the impregnated fibers. A fiber-reinforced composite material is obtained by layering and then heat-curing the imide prepreg.
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