Polyamide foams, process to make them and applications thereof
US7994231B2 · kind B2 · utility
14Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2006 |
| Grant date | Aug 9, 2011 |
| Priority date | — |
| Expiry date | Apr 28, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2423/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Closed cell polyamide foams are prepared by subjecting a polyamide resin to inert gases at an elevated pressure and at a temperature above the softening point of the resin and reducing the pressure while the temperature is maintained above the softening point of the resin, resulting in expansion of the resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.