US 12,084,541 B2
Polylactic acid solid composition and method for producing the same
Tsutaki Katayama, Yokohama (JP); Seishi Yoshikawa, Yokohama (JP); and Koki Shibata, Yokohama (JP)
Assigned to TOYO SEIKAN GROUP HOLDINGS, LTD., Tokyo (JP)
Appl. No. 17/598,355
Filed by TOYO SEIKAN GROUP HOLDINGS, LTD., Tokyo (JP)
PCT Filed Mar. 30, 2020, PCT No. PCT/JP2020/014453
§ 371(c)(1), (2) Date Sep. 27, 2021,
PCT Pub. No. WO2020/203946, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-067688 (JP), filed on Mar. 29, 2019.
Prior Publication US 2022/0185952 A1, Jun. 16, 2022
Int. Cl. C08G 63/08 (2006.01); C08K 3/105 (2018.01); C08K 3/26 (2006.01)
CPC C08G 63/08 (2013.01) [C08K 3/105 (2018.01); C08K 3/26 (2013.01)] 2 Claims
 
1. A polylactic acid solid composition comprising:
a polylactic acid having a weight average molecular weight in a range of 12,000 to 40,000, which is measured in terms of polystyrene standard by GPC; and sodium carbonate, as a molecular weight reduction accelerator, wherein the sodium carbonate is contained in an amount in a range of 7.4 to 20 mass %,
wherein the polylactic acid solid composition has a granular form with an average particle diameter (D50) of not more than 6.492 μm, which is measured by a laser diffraction scattering method.