	US 12,303,856 B2
	Hydroxyethyl cellulose microcapsules
Yi Zhang, Union Beach, NJ (US); Yabin Lei, Union Beach, NJ (US); Li Xu, Union Beach, NJ (US); Ronald Gabbard, Union Beach, NJ (US); Lewis Michael Popplewell, Union Beach, NJ (US); Julie Ann Wieland, Union Beach, NJ (US); and Takashi Sasaki, Union Beach, NJ (US)
Assigned to INTERNATIONAL FLAVORS & FRAGRANCES INC., New York, NY (US)
Appl. No. 17/416,090
Filed by International Flavors & Fragrances Inc., New York, NY (US)
PCT Filed Dec. 17, 2019, PCT No. PCT/US2019/066975 § 371(c)(1), (2) Date Jun. 18, 2021, PCT Pub. No. WO2020/131956, PCT Pub. Date Jun. 25, 2020.
Claims priority of provisional application 62/803,024, filed on Feb. 8, 2019.
Prior Publication US 2022/0071864 A1, Mar. 10, 2022
Int. Cl. B01J 13/16 (2006.01); A61K 8/11 (2006.01); A61K 8/34 (2006.01); A61K 8/37 (2006.01); A61K 8/44 (2006.01); A61K 8/73 (2006.01); A61K 8/92 (2006.01); A61K 9/50 (2006.01); A61Q 5/02 (2006.01); A61Q 5/12 (2006.01); A61Q 13/00 (2006.01); A61Q 15/00 (2006.01); A61Q 19/00 (2006.01); A61Q 19/10 (2006.01); B01J 13/20 (2006.01); C08G 18/64 (2006.01); C08G 18/70 (2006.01); C08K 5/07 (2006.01); C11D 3/00 (2006.01); C11D 3/50 (2006.01)

CPC B01J 13/16 (2013.01) [A61K 8/345 (2013.01); A61K 8/375 (2013.01); A61K 8/44 (2013.01); A61K 8/73 (2013.01); A61K 8/731 (2013.01); A61K 8/736 (2013.01); A61K 8/922 (2013.01); A61K 9/5047 (2013.01); A61K 9/5089 (2013.01); A61Q 5/02 (2013.01); A61Q 5/12 (2013.01); A61Q 15/00 (2013.01); A61Q 19/007 (2013.01); A61Q 19/10 (2013.01); B01J 13/206 (2013.01); C08G 18/6484 (2013.01); C08G 18/705 (2013.01); C08K 5/07 (2013.01); C11D 3/001 (2013.01); C11D 3/0015 (2013.01); A61K 8/11 (2013.01); A61Q 13/00 (2013.01); C11D 3/505 (2013.01); C11D 2111/12 (2024.01)]

16 Claims

1. A microcapsule composition comprising microcapsules that contain a microcapsule core and a microcapsule wall encapsulating the microcapsule core, wherein the microcapsule core contains an active material and the microcapsule wall contains by weight 35% to 90% of a hydroxyethyl cellulose, 2% to 30% of a polyisocyanate, 1% to 50% of a polyphenol, and 0.5% to 20% of a multi-functional aldehyde, provided that the total amount of the hydroxyethyl cellulose, polyisocyanate, polyphenol, and multi-functional aldehyde is equal to or less than 100%, and wherein the hydroxyethyl cellulose and the polyisocyanate reacts to form polyurethane bond, the hydroxyethyl cellulose reacts with the multi-functional aldehyde to form an acetal or hemi-acetal product, and the polyphenol reacts with the polyisocyanate to form a polyurethane polymer.