Heat resistant composition bismaleimide-modified polyurethane
US5602213A · kind A · utility
9Cited by
7References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1993 |
| Grant date | Feb 11, 1997 |
| Priority date | — |
| Expiry date | Jul 9, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/929
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A heat resistant composition comprising a mixture of (a) a polyurethane or a modified polyurethane and (b) a bismaleimide oligomer, in which the bismaleimide oligomer is in an amount of about 1 to 35 percent by weight based on overall solid contents. The polyurethane is formed by reacting a diisocyanate-containing compound with a dihydroxy diol-compound. Then the polyurethane is reacted with a trimellitic anhydride, a diacid or a mixture thereof to form the modified polyurethane. The bismaleimide oligomer is formed by reacting a bismaleimide resin with a barbituric acid or a derivative thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.