Capsules
A population of capsules, the capsules can include a core including a benefit agent and a shell surrounding the core, wherein the shell can include a first shell component.
1 . A population of capsules, the capsules comprising:
an oil-based core comprising a benefit agent; and
a substantially inorganic shell surrounding the core, the shell comprising:
a first shell component comprising:
a condensed layer comprising a condensation product of a precursor, and
wherein the precursor comprises at least one compound of Formula (I)
(M v O z Y n ) w (Formula I)
where M is one or more of silicon, titanium and 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, —OR 2 , halo,
—NH 2 , —NHR 2 , —N(R 2 ) 2 , and
wherein R 2 is a C 1 to C 20 alkyl, C 1 to C 20 alkylene, C 6 to C 22 aryl, or a 5-12 membered heteroaryl comprising from 1 to 3 ring heteroatoms selected from O, N, and S,
R 3 is a H, C 1 to C 20 alkyl, C 1 to C 20 alkylene, C 6 to C 22 aryl, or a 5-12 membered heteroaryl comprising from 1 to 3 ring heteroatoms selected from O, N, and S,
n is from 0.7 to (v-1), and
w is from 2 to 2000;
wherein the substantially inorganic shell comprises up to 1% organic content; and
wherein the shell comprises an organic emulsifier.
2 . The capsules according to claim 1 , wherein an inorganic second shell component surrounds the first shell component.
3 . The capsules according to claim 2 , where the inorganic second shell component comprises at least one of SiO 2 or CaCO 3 .
4 . The capsules according to claim 1 , wherein the capsules have a mean volume weighted capsule diameter of about 0.1 μm to about 200 μm.
5 . The capsules according to claim 1 , wherein the organic emulsifier is at least one of an organic surfactant or an organic polymeric emulsifier.
6 . The capsules according to claim 5 , wherein the organic emulsifier is an organic polymeric emulsifier.
7 . The capsules according to claim 6 , wherein organic polymeric emulsifier is at least one of polymers containing carboxylic acid groups, copolymers of vinyl and carboxylic acid groups, polymers containing quaternized ammonium salt groups, polymers containing nitrogen-based cationic groups, polysaccharides, anionically modified polysaccharides, or cationically modified polysaccharides.
8 . The capsules according to claim 6 , wherein the organic polymeric emulsifier is at least one of polyvinyl alcohol, copolymer of vinyl alcohol and vinyl acetate, polyethylene glycol, copolymer of ethylene oxide and propylene oxide, copolymers of ethylene and maleic anhydride, copolymer of butene and maleic anhydride, copolymer of styrene and maleic anhydride, Tween 20, Tween 80, Chitosan, Gelatin, Gum Arabic, Polyethylene imine, or polyvinyl pyrrolidone.
9 . The capsules according to claim 8 , wherein the organic polymeric emulsifier is at least one of polyvinyl alcohol or copolymers of ethylene and maleic anhydride.
10 . The capsules according to claim 5 , wherein the organic surfactant is at least one of anionic surfactant, cationic surfactant, non-ionic surfactant or amphoteric surfactant.
11 . The capsules according to claim 10 , wherein the anionic surfactant is at least one of alkyl sulfates, alkyl sulfonates, alkyl phosphates, alkyl carboxylates, alkyl ethoxylated sulfates, alkyl ethoxylated sulfonates, alkyl ethoxylated phosphates, or alkyl ethoxylated carboxylates.
12 . The capsules according to claim 10 , wherein the cationic surfactant is at least one of alkyl ammonium salts or alkyl amines.
13 . The capsules according to claim 10 , wherein the non-ionic surfactant is at least one of alkyl ethoxylates, alkyl phenol ethoxylates, alkyl polyglucosides, alkyl polysorbates, sorbitan esters, or glycerol esters.
14 . The capsules according to claim 10 , wherein the amphoteric surfactant is at least one of amine oxides or amine betaines.
15 . The capsules according to claim 5 , wherein the organic surfactant is at least one of sodium dodecyl sulfates, Triton X, Span 20, Span 80, cetyl trimethylammonium chloride, or cocamido propyl betaine.
16 . The capsules according to claim 1 , wherein the benefit agent comprises at least one of chromogens and dyes, perfume compositions, perfume raw materials, lubricants, silicone oils, waxes, hydrocarbons, higher fatty acids, essential oils, lipids, skin coolants, vitamins, sunscreens, antioxidants, catalysts, malodor reducing agents, odor-controlling materials, softening agents, insect and moth repelling agents, colorants, pigments, pharmaceuticals, pharmaceutical oils, adhesives, bodying agents, drape and form control agents, smoothness agents, wrinkle control agents, sanitization agents, disinfecting agents, germ control agents, mold control agents, mildew control agents, antiviral agents, drying agents, stain resistance agents, soil release agents, fabric refreshing agents and freshness extending agents, chlorine bleach odor control agents, dye fixatives, color maintenance agents, color restoration/rejuvenation agents, anti-fading agents, anti-abrasion agents, wear resistance agents, fabric integrity agents, anti-wear agents, anti-pilling agents, defoamers, anti-foaming agents, UV protection agents, sun fade inhibitors, anti-allergenic agents, fabric comfort agents, shrinkage resistance agents, stretch resistance agents, stretch recovery agents, skin care agents and natural actives, dyes, phase change materials, fertilizers, nutrients, or herbicides.
17 . The capsules according to claim 16 , wherein the benefit agent comprises a perfume composition.
18 . The capsules according to claim 1 , where the benefit agent containing core further comprises a core modifier.
19 . The capsules according to claim 2 , where the inorganic second shell component comprises at least one of SiO 2 , TiO 2 , Al 2 O 3 , CaCO 3 , Ca 2 SiO 4 , Fe 2 O 3 , Fe 3 O 4 , iron, silver, nickel, gold, copper, or clay.