US 12,104,041 B2
Biodegradable resin particles and external preparation including the same
Kengo Nishiumi, Osaka (JP); and Shinya Matsuno, Osaka (JP)
Assigned to SEKISUI KASEI CO., LTD., Osaka (JP)
Appl. No. 17/622,392
Filed by SEKISUI KASEI CO., LTD., Osaka (JP)
PCT Filed Jun. 25, 2020, PCT No. PCT/JP2020/024938
§ 371(c)(1), (2) Date Dec. 23, 2021,
PCT Pub. No. WO2020/262509, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 2019-121383 (JP), filed on Jun. 28, 2019.
Prior Publication US 2022/0356326 A1, Nov. 10, 2022
Int. Cl. C08J 9/28 (2006.01); A61K 8/19 (2006.01); A61K 8/85 (2006.01); A61Q 1/12 (2006.01); A61Q 17/04 (2006.01); A61Q 19/10 (2006.01); C08J 3/14 (2006.01); C08K 3/26 (2006.01); C08K 5/06 (2006.01)
CPC C08K 5/06 (2013.01) [A61K 8/19 (2013.01); A61K 8/85 (2013.01); A61Q 1/12 (2013.01); A61Q 17/04 (2013.01); A61Q 19/10 (2013.01); C08K 3/26 (2013.01); A61K 2800/412 (2013.01)] 8 Claims
OG exemplary drawing
 
1. Biodegradable resin particles comprising a polyhydroxy alkanoate, wherein
an amount of a Ca component present in the particles is 10 to 10,000 ppm,
the biodegradable resin particles have a volume average particle diameter of 2 to 50 μm,
the biodegradable resin particles have a BET specific surface area of 0.8 to 10 m2/g, and
the biodegradable resin particles have a linseed oil absorption of 50 to 300 ml/100 g.