Polylactic acid and manufacturing process thereof
US8304490B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 20, 2005 |
| Grant date | Nov 6, 2012 |
| Priority date | — |
| Expiry date | Feb 22, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
It is an object of the present invention to provide polylactic acid containing a stereocomplex crystal and having excellent moldability, a high molecular weight, high crystallinity and a high melting point and a process for manufacturing the same. It is another object of the present invention to provide a composition comprising the polylactic acid and a molded product of the polylactic acid. The present invention is characterized from polylactic acid having a weight average molecular weight of 80,000 to 500,000 and a melting peak at 195° C. or higher which accounts for 80% or more of the total of melting peaks in the temperature elevation step when measured by a differential scanning calorimeter (DSC) and a process for manufacturing the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.