摘要 |
PURPOSE: A manufacturing method of colored polylactic acid is provided to effectively manufacture a polylactic acid resin with various colors in short time by using a selective initiator which determines the color. CONSTITUTION: A manufacturing method of colored polylactic acid comprises: a step of synthesizing an aluminum catalyst ligand in a solvent; and a step of adding a lactide monomer and a selective initiator determining the color into the solvent with the aluminum catalyst ligand, and conducting a polylactic acid polymerization. The solvent is selected from toluene, benzene, pentane, cyclopentane, hexane, cyclohexane, chloroform, diethyl ether, or 1,4-dioxane. The aluminum catalyst ligand is obtained by mixing trimethylaluminum and a C5H4N(CO)NHC6H4(NO2)2 solution. [Reference numerals] (AA) Catalyst; (BB) Initiator; (CC,EE) Dye; (DD) Lactide; (FF) Colored polylactic acid resin
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