Biodegradable multiphase compositions based on starch
US8101253B2 · kind B2 · utility
2Cited by
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41Claims
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Key dates
| Filing date | Sep 26, 2007 |
| Grant date | Jan 24, 2012 |
| Priority date | — |
| Expiry date | Dec 29, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/681
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to biodegradable multiphase compositions characterized in that they comprise three phases: (a) a continuous phase composed of a matrix of at least one tough hydrophobic polymer incompatible with the starch; (b) a nanoparticulate dispersed starch phase with mean dimensions of less than 0.3 μm, (c) a further dispersed phase of at least one rigid and fragile polymer with modulus greater than 1000 MPa. Such compositions having a Modulus greater than 300 MPa and a substantial isotropy in the two longitudinal and transverse directions in relation to tear propagation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.