Activated arylamine-based polybenzoxazines
US6160079A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1999 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Apr 14, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G14/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Arylamines with electron donating groups such as alkyl and alkoxy groups in the meta position on the aromatic ring change the polymerization temperature of the benzoxazine prepared therefrom and offer an opportunity for an additional crosslinking site (the para position on the aromatic amine can couple to a Mannich base generated by the opening of the oxazine ring of the benzoxazine or a methylene bridge generated by a degradation reaction). Naphthenic amines with an alkyl or alkoxy substituent on the 5.sup.th through the 8.sup.th carbon atom on the naphthalene ring can function similarly. The polymers for benzoxazines prepared from at least 10% substituted aromatic or naphthenic amines are useful due to low polymerization temperatures and higher Tg (glass transition temperature).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.