Polylactic Acid Resin Composition and Resin Molded Article Thereof

Abstract

Provided are a polylactic acid resin composition excellent in transparency, heat resistance, and migration resistance, and excellent in productivity at the time of the mold forming thereof, and a resin molded article thereof. The polylactic acid resin composition includes a polylactic acid; a reaction product of glycerin, an alkylene oxide mainly formed of ethylene oxide, and a fatty acid having 12 to 24 carbon atoms; and a fatty acid amide having a hydroxyl group.

What is claimed is: 
     
         1 . A polylactic acid resin composition comprising:
 a first component comprising a polylactic acid;   a second component comprising a reaction product of glycerin, an alkylene oxide mainly formed of ethylene oxide, and a fatty acid having 12 to 24 carbon atoms; and   a third component comprising a fatty acid amide comprising a hydroxyl group.   
     
     
         2 . The polylactic acid resin composition according to  claim 1 , wherein the reaction product as the second component contains 30 to 95 wt % of an oxyethylene group. 
     
     
         3 . The polylactic acid resin composition according to  claim 1 , wherein the reaction product as the second component comprises a hydroxyl group derived from the alkylene oxide. 
     
     
         4 . The polylactic acid resin composition according to  claim 2 , wherein the reaction product as the second component comprises a hydroxyl group derived from the alkylene oxide. 
     
     
         5 . The polylactic acid resin composition according to  claim 1 , wherein the reaction product as the second component comprises 0.5 or more and less than 2.5 ester groups on average in a molecule thereof. 
     
     
         6 . The polylactic acid resin composition according to  claim 2 , wherein the reaction product as the second component comprises 0.5 or more and less than 2.5 ester groups on average in a molecule thereof. 
     
     
         7 . The polylactic acid resin composition according to  claim 1 , wherein the fatty acid amide as the third component comprises a bisamide compound obtained by causing a fatty acid comprising 8 to 24 carbon atoms and comprising a hydroxyl group, and a compound comprising two amino groups to react with each other. 
     
     
         8 . The polylactic acid resin composition according to  claim 2 , wherein the fatty acid amide as the third component comprises a bisamide compound obtained by causing a fatty acid comprising 8 to 24 carbon atoms and having a hydroxyl group, and a compound comprising two amino groups to react with each other. 
     
     
         9 . The polylactic acid resin composition according to  claim 1 , wherein a content of the second component falls within a range of 2 to 10 parts by weight with respect to 100 parts by weight of the first component. 
     
     
         10 . The polylactic acid resin composition according to  claim 2 , wherein a content of the second component falls within a range of 2 to 10 parts by weight with respect to 100 parts by weight of the first component. 
     
     
         11 . The polylactic acid resin composition according to  claim 1 , wherein a content of the third component falls within a range of 0.1 to 0.7 part by weight with respect to 100 parts by weight of the first component. 
     
     
         12 . The polylactic acid resin composition according to  claim 2 , wherein a content of the third component falls within a range of 0.1 to 0.7 part by weight with respect to 100 parts by weight of the first component. 
     
     
         13 . A resin molded article comprising a polylactic acid resin composition comprising:
 a first component comprising a polylactic acid;   a second component comprising a reaction product of glycerin, an alkylene oxide mainly formed of ethylene oxide, and a fatty acid having 12 to 24 carbon atoms; and   a third component comprising a fatty acid amide comprising a hydroxyl group.   
     
     
         14 . The resin molded article according to  claim 13 , wherein the reaction product as the second component contains 30 to 95 wt % of an oxyethylene group.