C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 67/04 (2006.01) B05D 7/24 (2006.01) C08J 3/03 (2006.01) C08J 5/18 (2006.01) C09D 167/04 (2006.01) C08L 101/16 (2006.01)
Patent
CA 2598470
It is intended to provide a process for producing a polylactic acid, or film thereof, excelling in heat resistance and strength without the use of any harmful solvent. It is also intended to provide an aqueous emulsion of polylactic acid, or coating agent containing the same, suitable for production of polylactic acid in which any harmful solvent is not contained. There is provided a process for producing polylactic acid, comprising: the step (1) of preparing both of an aqueous emulsion of poly-L-lactic acid and an aqueous emulsion of poly-D-lactic acid; the step (2) of mixing the aqueous emulsions together to thereby obtain a mixed emulsion; and the step (3) of drying the mixed emulsion.
La présente invention concerne un procédé de production d~acide polylactique, ou d~un film de celui-ci, qui présente d~excellentes propriétés de résistance thermique et de force sans utiliser un quelconque solvant nocif. L'invention concerne également une émulsion aqueuse d'acide polylactique, ou un agent de revêtement qui la comprend, appropriée pour la production d'acide polylactique et qui ne comprend aucun solvant nocif. L~invention concerne un procédé pour la production d~acide polylactique, qui comprend : l~étape (1) de préparation à la fois d~une émulsion aqueuse d~acide poly-L-lactique et d~une émulsion aqueuse d~acide poly-D-lactique ; l~étape (2) de mélange des émulsions aqueuses ensemble pour ainsi obtenir une émulsion mixte ; et l~étape (3) de séchage de l~émulsion mixte.
Borden Ladner Gervais Llp
Kimura Yoshiharu
Musashino Chemical Laboratory Ltd.
Mutual Corporation
Teijin Limited
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