Patent ID: 9271905
Filing Date: 2016-03-01
CPC Classification: A61K,A61Q,B01J,C11D

Claim Text:
1. A process for the preparation of polyurea microcapsules for use in a consumer product, which process comprises: dissolving a first mixture of at least one aliphatic polyisocyanate and at least one aromatic polyisocyanate, both having at least two isocyanate functional groups, in a perfume to form a first solution with the aliphatic and aromatic polyisocyanates present in a molar ratio ranging from 80:20 to 10:90; adding to the first solution an aqueous solution that includes an emulsifier or a colloidal stabilizer to form a second mixture; and adding to the second mixture a polyamine to form with the polyisocyanate a slurry of microcapsules having a polyurea wall encapsulating the perfume therein in order to obtain microcapsules that exhibit less perfume leakage during storage in a consumer product that includes a surfactant and better odor performance during use of the consumer product that contains the microcapsules compared to a consumer product containing a surfactant and polyurea microcapsules made without the recited mixture of polyisocyanates.