Methods of making capsules

A method of making capsules comprising a substantially inorganic shell surrounding an aqueous core, comprising:

• admixing an oil phase comprising a precursor with an aqueous phase comprising water and a benefit agent, wherein at least one of the oil phase or aqueous phase comprises inorganic nanoparticles, wherein the precursor comprises at least one compound of Formula (II),
• (MvOzYnR1p)w (Formula II)
• where M is at least one of silicon, titanium or aluminum,
• v is the valence number of M and is 3 or 4,
• z is from 0.5 to 1.6
• each Y is independently selected from —OH, —OR2, halo,
• —NH2, —NHR2, —N(R2)2, and
• wherein R2 is a C1 to C20 alkyl, C1 to C20 alkylene, C6 to C22 aryl, or a 5-12 membered heteroaryl comprising from 1 to 3 ring heteroatoms selected from O, N, and S,
• R3 is a H, C1 to C20 alkyl, C1 to C20 alkylene, C6 to C22 aryl, or a 5-12 membered heteroaryl comprising from 1 to 3 ring heteroatoms selected from O, N, and S,
• n is from 0 to (v-1),
• each R1 is independently selected from a C1 to C30 alkyl, a C1 to C30 alkylene, a C1 to C30 alkyl substituted with at least one of a halogen, —OCF3, —NO2, —CN, —NC, —OH, —OCN, —NCO, alkoxy, epoxy, amino, mercapto, acryloyl, COAL CO2alkyl, aryl, and heteroaryl, and a C1 to C30 alkylene substituted with at least one of a halogen, —OCF3, —NO2, —CN, —NC, —OH, —OCN, —NCO, alkoxy, epoxy, amino, mercapto, acryloyl, CO2H CO2alkyl, aryl, and heteroaryl,
• p is present in an amount up to pmax, and
• w is from 2 to 2000;
• wherein pmax=60 /[9*Mw(R1)+8], where Mw(R1) is the molecular weight of the R1 group;
• emulsifying the admixture of the oil phase and aqueous phase under conditions sufficient to disperse droplets of aqueous phase in the oil phase, wherein the nanoparticles self-assemble around the aqueous droplets and are interposed at an interface of the aqueous phase and the oil phase, and the precursor hydrolyzes and condensates at the interface between the oil phase and aqueous phase;
• curing the emulsion under conditions to solidify the hydrolyzed and condensed precursor, thereby forming a first shell component comprising the condensed precursor and nanoparticles around the aqueous droplets and forming the capsules having aqueous phase as the core;
• and
• Admixing the capsules with a second shell component solution comprising a second shell component precursor under conditions sufficient to obtain capsules with an inorganic second shell component, thereby forming capsules with both a first and second shell component.