Chemically modified plasticized starch compositions by extrusion processing
US7153354B2 · kind B2 · utility
18Cited by
3References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2004 |
| Grant date | Dec 26, 2006 |
| Priority date | — |
| Expiry date | Nov 19, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/346
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A chemically modified plasticized starch (CMPS) is prepared by reacting starch with an organic dibasic acid or an anhydride of the acid in the presence of a plasticizer using optional free radical initiators, and optionally with the incorporation of nano clays in the reactive extrusion process. The starch is thermoplastic and has a lower viscosity than the traditional thermoplastic starch. The CMPS is useful in preparing starch polymer compositions which are at least partially biodegradable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.