Bis(maleimido) phenoxy phenylphosphine oxide
US5101037A · kind A · utility
12Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1991 |
| Grant date | Mar 31, 1992 |
| Priority date | — |
| Expiry date | Aug 27, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/5537
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Bis(maleimido) phenoxy phenylphosphine oxide monomers are formed by reacting a bis(aminophenoxyphenyl) phosphine oxide, e.g., bis(3-aminophenoxy) triphenylphosphine oxide, with maleic anhydride forming the intermediate bismaleamic acid species which is cyclodehydrated to the desired bismaleimido compound. The improved properties include: (1) a low melting point (T.sub.m =90.degree. C.); (2) a wide processing temperature range (T.sub.cure =210.degree. C.); and (3) a high T.sub.g value of 400.degree. C.; and (4) a high char yield which suggests flame resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.