Method for preparing extruded polyamide foams
US11332592B2 · kind B2 · utility
0Cited by
0References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2018 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Jun 11, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2451/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A continuous method of producing polyamide foams by an extrusion foaming process is disclosed. The polyamide foam includes a polyamide resin compounded with a composite chain extender including an epoxy chain extender and a maleic anhydride grafted polypropylene (MAPP) wax. The produced polyamide foams have improved properties, including a smooth surface, low density, and small cell size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.