Process for preparing polyamide-imide foam
US4960549A · kind A · utility
16Cited by
20References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 1988 |
| Grant date | Oct 2, 1990 |
| Priority date | — |
| Expiry date | May 23, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C44/50
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to preparation of polyamide-imide foam by extruding foamable composition comprising polyamide-imide and volatiles into a confined expansion zone, expanding the composition therein and cooling the result. The resulting foams are essentially open-celled and exhibit good strength, insulating properties and other desirable features.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.