Biodegradable materials from starch-grafted polymers
US7608649B2 · kind B2 · utility
27Cited by
11References
18Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 26, 2003 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | May 30, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2666/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Granular starch is added to a polymer in order to decrease the cost of the polymer derivative. Use of granular starch also makes the derivative more biodegradable. The polymer blend has very similar mechanical properties to pure polymer. Furthermore, unlike other starch/polyethylene mixtures, glycerol is not added to the mixture. This reduces the water absorbency of the final product. The polymer and starch are blended together in the presence of an interfacial compatibilizer that binds the two components together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.