Thermoplastic and polymer foams and method of preparation thereof
US7638560B2 · kind B2 · utility
2Cited by
43References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 2005 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Dec 25, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L51/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A foamed starch-polyester graft copolymer and chemically modified starch-polyester graft copolymer composition comprising a chemically modified starch or chemically modified starch-nanoclay product is described. The composition can be produced continuously in a twin-screw co-rotating extruder in the presence of a blowing agent. The foams are biodegradable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.