	US 12,441,850 B2
	Amphiphilic alginic acid particle group and method for producing same
Toshifumi Hashiba, Chiba (JP); Kazutoshi Hayakawa, Chiba (JP); and Erina Matsuzaka, Chiba (JP)
Assigned to NISSHINBO HOLDINGS INC., Tokyo (JP)
Appl. No. 18/009,451
Filed by NISSHINBO HOLDINGS INC., Tokyo (JP)
PCT Filed May 7, 2021, PCT No. PCT/JP2021/017444 § 371(c)(1), (2) Date Dec. 9, 2022, PCT Pub. No. WO2021/251034, PCT Pub. Date Dec. 16, 2021.
Claims priority of application No. 2020-101625 (JP), filed on Jun. 11, 2020.
Prior Publication US 2023/0331939 A1, Oct. 19, 2023
Int. Cl. A61K 8/73 (2006.01); A61Q 1/02 (2006.01); A61Q 19/10 (2006.01); C08J 3/12 (2006.01); C09D 105/04 (2006.01); C09K 3/18 (2006.01)

CPC C08J 3/12 (2013.01) [A61K 8/733 (2013.01); A61Q 1/02 (2013.01); A61Q 19/10 (2013.01); C09D 105/04 (2013.01); C09K 3/18 (2013.01); A61K 2800/41 (2013.01); C08J 2305/04 (2013.01)]

18 Claims

1. Amphiphilic alginic acid particles obtained by subjecting a polyvalent metal salt of alginic acid to hydrophobizing treatment using a hydrophobizing agent,

wherein the particles are hydrophobized by way of chemical bonding between some metal ions in the polyvalent metal salt of alginic acid and the hydrophobizing agent, have a contact angle 30 seconds after a water droplet is placed on the particles of at least 30° and not more than 150°, and have a water absorption per 100 g of particles and an oil absorption per 100 g of particles such that the water absorption is equal to or greater than the oil absorption.