The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 16, 2023
Filed:
Feb. 12, 2021
Applicant:
Encapsys, Llc, Appleton, WI (US);
Inventor:
Linsheng Feng, Menasha, WI (US);
Assignee:
Encapsys, LLC, Appleton, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C11D 3/00 (2006.01); C11D 3/50 (2006.01); C11D 11/00 (2006.01); C11D 11/02 (2006.01); B01J 13/14 (2006.01); B01J 13/16 (2006.01); C11B 9/00 (2006.01);
U.S. Cl.
CPC ...
B01J 13/16 (2013.01); C11B 9/00 (2013.01); C11D 3/0015 (2013.01); C11D 3/505 (2013.01);
Abstract
An improved process of forming polyurea and chitosan microcapsules encapsulating a benefit agent is described. The process comprises forming a water phase comprising hydrolyzing chitosan in an acidic medium at a pH of 6.5 or less for an extended period and combining with a polyisocyanate. The reaction product of the hydrolyzed chitosan and polyisocyanate yields a microcapsule having improved release characteristics, with enhanced degradation characteristics in OECD test method 301B.