	US 11,806,414 B2
	Silica-including microcapsule resin particles, method for producing same, and application thereof
Akiyoshi Kusaka, Nara (JP); Yoshinao Yamaji, Nara (JP); and Ryosuke Harada, Shiga (JP)
Assigned to SEKISUI PLASTICS CO., LTD., Osaka (JP)
Filed by SEKISUI PLASTICS CO., LTD., Osaka (JP)
Filed on Feb. 11, 2021, as Appl. No. 17/173,334.
Application 17/173,334 is a continuation of application No. 16/070,675, granted, now 10,952,938, previously published as PCT/JP2017/007390, filed on Feb. 27, 2017.
Claims priority of application No. 2016-037351 (JP), filed on Feb. 29, 2016.
Prior Publication US 2021/0161776 A1, Jun. 3, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61K 9/50 (2006.01); A61K 8/11 (2006.01); A61K 8/25 (2006.01); A61Q 19/00 (2006.01); A61K 8/02 (2006.01); C01B 33/159 (2006.01); G02B 1/04 (2006.01); B32B 27/18 (2006.01); C09D 7/40 (2018.01); A61Q 1/00 (2006.01); G02B 5/02 (2006.01); B01J 13/06 (2006.01); C09D 7/65 (2018.01); C09D 7/61 (2018.01); A61Q 1/12 (2006.01); B01J 13/18 (2006.01)

CPC A61K 8/11 (2013.01) [A61K 8/02 (2013.01); A61K 8/0279 (2013.01); A61K 8/25 (2013.01); A61Q 1/00 (2013.01); A61Q 1/12 (2013.01); A61Q 19/00 (2013.01); B01J 13/06 (2013.01); B01J 13/185 (2013.01); B32B 27/18 (2013.01); C01B 33/159 (2013.01); C09D 7/40 (2018.01); C09D 7/61 (2018.01); C09D 7/65 (2018.01); C09D 7/68 (2018.01); C09D 7/69 (2018.01); G02B 1/04 (2013.01); G02B 5/02 (2013.01); G02B 5/0226 (2013.01); A61K 2800/10 (2013.01); A61K 2800/412 (2013.01); A61K 2800/614 (2013.01); A61K 2800/651 (2013.01); A61K 2800/654 (2013.01)]

14 Claims

1. Silica-including microcapsule resin particles, each silica- including microcapsule resin particle consisting essentially of:

an outer shell constituted of a crosslinked polymer, the crosslinked polymer being a copolymer of a monofunctional monomer having one vinyl group and a crosslinking monomer having two or more vinyl groups;

a cavity partitioned with said outer shell; and

silica particles mutually connected to form a porous structure inside said cavity;

wherein the silica-including microcapsule resin particles have a volume average particle diameter of 0.5 to 100 μm.