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 populations of capsules, the capsules comprising:
an aqueous core comprising a benefit agent; and
a shell surrounding the core, the shell comprising
a substantially inorganic first shell component comprising:
a condensed layer comprising a condensation product of a precursor, and
a nanoparticle layer comprising inorganic nanoparticles,
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, and wherein the mass % of condensed layer with respect to the total mass of the shell is from about 10% to about 99;
wherein the inorganic nanoparticles of the first shell component comprise at least one of SiO 2 , TiO 2 , Al 2 O 3 , Fe 2 O 3 , Fe 3 O 4 , CaCo 3 , clay, silver, gold, or copper.
2. The capsules of claim 1 , wherein the shell further comprises an inorganic second shell component surrounding the first shell component.
3. The capsules of claim 1 , wherein 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.
4. The capsules of claim 1 , wherein the benefit agent comprises at least one of perfume raw materials, perfume compositions, skin coolants, vitamins, sunscreens, antioxidants, glycerin, bleach encapsulates, chelating agents, antistatic agents, insect and moth repelling agents, colorants, antioxidants, sanitization agents, disinfecting agents, germ control agents, mold control agents, mildew control agents, antiviral agents, drying agents, stain resistance agents, soil release agents, chlorine bleach odor control agents, dye fixatives, dye transfer inhibitors, color maintenance agents, optical brighteners, color restoration/rejuvenation agents, anti-fading agents, whiteness enhancers, 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, enzymes, water proofing agents, fabric comfort agents, shrinkage resistance agents, stretch resistance agents, stretch recovery agents, skin care agents, and natural actives, antibacterial actives, antiperspirant actives, cationic polymers, dyes, metal catalysts, non-metal catalysts, activators, pre-formed peroxy carboxylic acids, diacyl peroxides, hydrogen peroxide sources, or enzymes.
5. The capsules of claim 1 , wherein the compound of formula (I) has a Polystyrene equivalent Weight Average Molecular Weight (Mw) of from about 700 Da to about 30,000 Da.
6. The capsules of claim 5 , wherein the compound of formula (I) has a degree of branching of 0.2 to about 0.6.
7. The capsules of claim 1 , wherein the compound of formula (I) has a molecular weight polydispersity index of about 1 to about 20.
8. The capsules of claim 1 , wherein the precursor comprises at least one compound of Formula (II),
(M v O z Y n R 1 p ) w (Formula II)
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 to (v−1),
each R 1 is independently selected from a C 1 to C 30 alkyl, a C 1 to C 30 alkylene, a C 1 to C 30 alkyl substituted with one or more of a halogen, —OCF 3 , —NO 2 , —CN, —NC, —OH, —OCN, —NCO, alkoxy, epoxy, amino, mercapto, acryloyl, CO 2 H, CO 2 alkyl, aryl, and heteroaryl, and a C 1 to C 30 alkylene substituted with one or more of a halogen, —OCF 3 , —NO 2 , —CN, —NC, —OH, —OCN, —NCO, alkoxy, epoxy, amino, mercapto, acryloyl, CO 2 H, CO 2 alkyl, aryl, and heteroaryl,
p is present in an amount up to pmax, and
w is from 2 to 2000;
wherein pmax=60/[9*Mw(R 1 )+8], where Mw(R 1 ) is the molecular weight of the R 1 group.
9. The capsules of claim 8 , wherein the shell further comprises an inorganic second shell component surrounding the first shell component.
10. The capsules of claim 8 , wherein the compound of formula (II) has a Polystyrene equivalent Weight Average Molecular Weight (Mw) of from about 700 Da to about 30,000 Da.
11. The capsules of claim 8 , wherein the compound of formula (II) has a molecular weight polydispersity index of from about 1 to about 20.
12. The capsules of claim 11 , wherein the compound of formula (II) has a degree of branching of from about 0.2 to about 0.6.