US 11,937,599 B2
Microencapsulated herbicides
John W. Hemminghaus, Chesterfield, MO (US); Neha Rana, Chesterfield, MO (US); Steven T. Voss, Edwardsville, IL (US); and Junhua Zhang, Chesterfield, MO (US)
Assigned to Monsanto Technology LLC, Saint Louis, MO (US)
Filed by Monsanto Technology LLC, St. Louis, MO (US)
Filed on Aug. 27, 2021, as Appl. No. 17/459,030.
Application 17/459,030 is a continuation of application No. 16/620,833, granted, now 11,129,381, previously published as PCT/US2018/037226, filed on Jun. 13, 2018.
Claims priority of provisional application 62/518,965, filed on Jun. 13, 2017.
Prior Publication US 2022/0079148 A1, Mar. 17, 2022
Int. Cl. A01N 25/28 (2006.01); A01N 25/04 (2006.01); A01N 37/10 (2006.01); A01N 37/22 (2006.01); A01N 43/707 (2006.01)
CPC A01N 25/28 (2013.01) [A01N 25/04 (2013.01); A01N 37/10 (2013.01); A01N 37/22 (2013.01); A01N 43/707 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A herbicidal microcapsule comprising:
a core material comprising an acetamide herbicide and a second herbicide comprising diflufenican, wherein at least 20 wt % of the second herbicide is dissolved in the acetamide herbicide and wherein the weight ratio of the acetamide herbicide to the second herbicide in the core material is at least about 2:1; and
a shell wall encapsulating the core material, wherein the shell wall comprises a polyurea formed by polymerization of a polyisocyanate component comprising a polyisocyanate or mixture of polyisocyanates and a polyamine component comprising a polyamine or mixture of polyamines to form the polyurea, wherein the polyisocyanate comprises an aliphatic polyisocyanate.