	US 12,290,585 B2
	Porous composite powder for adsorption of fine dust and method for manufacturing the same
Hyunsuk Lee, Yongin-si (KR); Jaewon You, Yongin-si (KR); Hye Won Na, Yongin-si (KR); Bokyung Jung, Yongin-si (KR); Chang Jo Jung, Yongin-si (KR); Nari Cha, Yongin-si (KR); Sangkyun Chae, Yongin-si (KR); and Sohyun Hong, Yongin-si (KR)
Assigned to AMOREPACIFIC CORPORATION, Seoul (KR)
Filed by AMOREPACIFIC CORPORATION, Seoul (KR)
Filed on Jun. 8, 2021, as Appl. No. 17/342,278.
Claims priority of application No. 10-2020-0070512 (KR), filed on Jun. 10, 2020; and application No. 10-2021-0067802 (KR), filed on May 26, 2021.
Prior Publication US 2021/0386634 A1, Dec. 16, 2021
Int. Cl. A61K 8/29 (2006.01); A61K 8/02 (2006.01); A61K 8/04 (2006.01); A61K 8/19 (2006.01); A61K 8/20 (2006.01); A61K 8/25 (2006.01); A61K 8/26 (2006.01); A61K 8/27 (2006.01); A61K 8/49 (2006.01); A61K 8/73 (2006.01); A61K 8/85 (2006.01); A61K 8/88 (2006.01); A61Q 19/00 (2006.01); A61Q 19/10 (2006.01)

CPC A61K 8/29 (2013.01) [A61K 8/025 (2013.01); A61K 8/0279 (2013.01); A61K 8/046 (2013.01); A61K 8/19 (2013.01); A61K 8/20 (2013.01); A61K 8/25 (2013.01); A61K 8/26 (2013.01); A61K 8/27 (2013.01); A61K 8/498 (2013.01); A61K 8/731 (2013.01); A61K 8/736 (2013.01); A61K 8/737 (2013.01); A61K 8/85 (2013.01); A61K 8/88 (2013.01); A61Q 19/008 (2013.01); A61Q 19/10 (2013.01); A61K 2800/412 (2013.01); A61K 2800/80 (2013.01); A61K 2800/805 (2013.01)]

7 Claims

1. Porous composite powder for adsorption of fine dust, comprising:

a biodegradable polymer;

a cationic polymer; and

inorganic particles,

wherein the biodegradable polymer and the cationic polymer form a composite on the surface and inside of the porous composite powder, wherein the inorganic particles are homogeneously dispersed on the surface and/or inside of the porous composite powder,

wherein the inorganic particle is at least one selected from the group consisting of TiO₂, ZnO, mica, sericite, and, silica,

wherein the porous composite powder comprises the cationic polymer in an amount of 0.1-10 wt. % based on the total weight of the porous composite powder and wherein:

i. the porous composite powder is positively charged;

ii. the porous composite powder has a zeta potential of 1 mV or more;

iii. the porous composite powder has a size of 50 μm or less;

iv. the porous composite powder has a pore size of 10 nm to 1 μm;

v. the porous composite powder has a porosity of 30-80%; and

wherein the biodegradable polymer is at least one selected from the group consisting of polylactic acid (PLA), polyglycolic acid (PGA), polylactic-co-glycolic acid (PLGA), polycaprolactone (PCL), cellulose and derivatives thereof, and

wherein the cationic polymer is at least one selected from the group consisting of cationic guar gum derivatives, chitosan and polylysine.