POLYLACTIC ACID COMPOSITION

• Main Authors: KATAGIRI YOSHIHIDE, NAKANO MITSURU, USUKI ARIMITSU, OKAMOTO HIROTAKA
• Format: Patent
• Language: English
• Published: 05.10.2006
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

PROBLEM TO BE SOLVED: To provide a polylactic acid composition which can provide great extensibility and flexibility so that a high degree of deformation, which is even greater than the state where the deformation is deviated from a linear behavior, can be conducted when stress is applied, and still has excellent delayed elasticity recovery characteristics that enables the recovery to almost the original shape after the elapse of a long time without rapid restoration of the shape when the stress is released after the deformation which is even greater than the state where the deformation is deviated from the linear behavior. SOLUTION: The polylactic acid composition comprises polylactic acid and an ester-based plasticizer wherein the content of the ester-based plasticizer is 16-33 wt.% and a residual deforming quantity measured at the time 0.2 minute after stress release is ≥66.7% and the residual deforming quantity measured at the time 240 hours after the stress release is ≤33.3%, provided that the stress is released after the stress is applied to produce the great deformation which is even greater than the state where the deformation is deviated from the linear behavior. COPYRIGHT: (C)2007,JPO&INPIT