Articles of manufacture with polyurea capsules cross-linked with chitosan

An article of manufacture made by a process comprising combining an adjunct material and microcapsules, the microcapsules comprising a core and a shell surrounding the core, the microcapsules formed by a process comprising:

• forming a water phase by hydrolyzing chitosan in an aqueous acidic medium at a pH of from 5.5 to 6.5 and a temperature of at least 40° C. for at least one hour;
• forming an oil phase comprising dissolving together at least one benefit agent and at least one polyisocyanate, optionally with an added oil;
• forming an emulsion by mixing under high shear agitation the water phase and the oil phase into an excess of the water phase, thereby forming droplets of the oil phase and benefit agent dispersed in the water phase;
• curing the emulsion by heating to at least 40° C., for a time sufficient to form a shell at an interface of the droplets with the water phase, the shell comprising the reaction product of the polyisocyanate and hydrolyzed chitosan, and the shell surrounding the core comprising the droplets of the oil phase and benefit agent,
• wherein the weight percent of chitosan in the shell is from 25 wt. % to 90 wt. %
• and wherein the core is from 0.01 to 99 weight percent of the microcapsule.