Stable polyurea microcapsule compositions for aldehyde fragrances

A microcapsule composition comprising a plurality of microcapsules dispersed in an aqueous phase,

• wherein
• each microcapsule having a microcapsule core and a microcapsule wall encapsulating the microcapsule core,
• the microcapsule core contains a fragrance having 8% to 100% one or more aldehydes by weight of the fragrance,
• the microcapsule wall is formed of an encapsulating polymer,
• the encapsulating polymer contains a polyurea polymer that is a reaction product of a multi-functional electrophile and a multi-functional nucleophile,
• the multi-functional electrophile contains a polyisocyanate,
• the multi-functional nucleophile contains a polyamine,
• the microcapsule composition has a viscosity of 2000 centipoises or less at a shear rate of 21 hertz and a temperature of 25° C., and
• the microcapsule composition contains by weight (i) 5% to 80% of the fragrance in the microcapsule core, (ii) 0.1% to 15% of the encapsulating polymer, and (iii) at least 0.01% of a water-soluble inorganic or organic salt of an alkali or alkaline earth metal.