Extruded foams made with polylactides that have high molecular weights and high intrinsic viscosities
US8722754B2 · kind B2 · utility
0Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2009 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Jun 27, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention provides an economical process for extruding a PLA resin into a low density foam with a high closed cell content. Excellent quality, low density foam is produced easily and reproducibly. The PLA resin in the foam has a weight average molecular weight of at least 500,000 and an intrinsic viscosity of at least 1.4 deciliters/gram.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.