Poly(lactic acid) stereocomplex
US7795358B2 · kind B2 · utility
0Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2008 |
| Grant date | Sep 14, 2010 |
| Priority date | — |
| Expiry date | Feb 22, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L67/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Poly(lactic acid) blends having a relatively high heat distortion temperature can be prepared by simple blending of PLA polymers of opposite stereoforms, followed by processing, e.g. by injection molding, under specific conditions of temperature and pressure, so as to produce a blend which, on differential scanning calorimetry, exhibits two peaks within the melting range of the stereocomplex. Moreover, by careful selection of these conditions of temperature and pressure, it is possible to use PLA polymers of significantly higher molecular weights than previously thought possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.