Water containing powder composition

1. A powdery composition, comprising:

a) core-shell particles having a shell of hydrophobized particles; and

b) a carrier powder comprising a carrier and at least one of an at least partially water soluble liquid and/or a water reactive substrate reversibly bound to the carrier by at least one of capillary action, absorption and adsorption;

wherein

the core-shell particles have a core, comprising:

water; and

0 to 10 wt. % of a total core weight of a dissolved or emulsified material,

the carrier comprises at least one material selected from the group consisting of silica, a silica-metal mixed oxide, phyllosilicate, starch, hollow glass spheres, nylon, sugar, cyclodextrines and polysaccharides, and

wherein a weight ratio of the carrier including the reversibly bound at least partially water soluble liquid and/or water reactive substrate to the core-shell particles is from 1:1 to 1:9,

wherein

the shell particles comprise hydrophobized silica particles,

a BET surface area of the hydrophobized silica particles is from 200 to 290 m 2 /g,

a carbon content of the hydrophobized silica particles is 2 to 4 wt.-%,

a methanol wettability of the hydrophobized silica particles is at least 50,

the hydrophobized silica particles are obtained by reacting a hydrophilic fumed silica having a BET surface area of from 270 to 330 m 2 /g with hexamethyldisilazane,

wherein at least one of

a) the aqueous phase of the core of the core-shell particles and

b) the at least partially water soluble liquid and water reactive substrate comprises at least one material selected from the group consisting of a UV light protection filter, an antioxidant, a moisturizing substance, a deodorant, an antiperspirant active compound, a biogenic substance, an insect repellent active compound, a bleaching agent, an antioxidant, a bleach, an antibacterial substance, an antifungal substance, a flavor, a fragrance, an acid, an alkali, and an enzyme, and

wherein

the carrier is a precipitated silica,

a BET surface area of the precipitated silica is from 400 to 500 m 2 /g,

a particle size d 50 of the precipitated silica, determined by laser diffraction, is from 4 to 6 μm, and

a DBP (dibutyl phthalate) absorption of the precipitated silica, in g DBP/100 g silica, is from 300 to 350.

2. The powdery composition according to claim 1 , wherein the hydrophobized silica particles are aggregated fumed silica particles.

3. The powdery composition according to claim 1 , wherein the core consists of water.

4. The powdery composition according to claim 1 , wherein a water content of the core-shell particles is 75 to 95 wt.-%.

5. The powdery composition according to claim 1 , wherein an average particle size of the core-shell particles is from 2 to 20 um.

6. The powdery composition according to claim 1 , wherein the average particle size of the core shell particles is 50 to 150% of the average particles size of the carrier.

7. A process for the manufacture of a creamy composition, comprising:

activating the powdery composition according to claim 1 by an energy input in form of pressure, shear, temperature, vibration and/or solvent addition,

the energy input being sufficient to release the liquid water or the liquid aqueous phase from the core-shell material,

the liquid water or the liquid aqueous phase subsequently is used for

a) dissolving or flushing the at least partially water soluble liquid from the carrier and/or

b) activating the water reactive substrate in and/or on the carrier and subsequently dissolving or flushing the product or products obtained by activating from the carrier.

8. The powdery composition according to claim 1 , wherein the shell particles consist of hydrophobized silica particles.

9. A powdery composition, comprising:

a) core-shell particles having a shell of hydrophobized particles; and

b) a carrier powder comprising a carrier and at least one of an at least partially water soluble liquid and/or a water reactive substrate reversibly bound to the carrier by at least one of capillary action, absorption and adsorption;

wherein

the core-shell particles have a core, comprising:

water; and

0 to 10 wt. % of a total core weight of a dissolved or emulsified material,

the carrier comprises at least one material selected from the group consisting of silica, a silica-metal mixed oxide, phyllosilicate, starch, hollow glass spheres, nylon, sugar, cyclodextrines and polysaccharides, and

wherein a weight ratio of the carrier including the reversibly bound at least partially water soluble liquid and/or water reactive substrate to the core-shell particles is from 1:1 to 1:9,

wherein

the shell particles comprise hydrophobized silica particles,

a BET surface area of the hydrophobized silica particles is from 200 to 290 m 2 /g,

a carbon content of the hydrophobized silica particles is 2 to 4 wt.-%,

a methanol wettability of the hydrophobized silica particles is at least 50,

the hydrophobized silica particles are obtained by reacting a hydrophilic fumed silica having a BET surface area of from 270 to 330 m 2 /g with hexamethyldisilazane,

wherein at least one of

a) the aqueous phase of the core of the core-shell particles and

b) the at least partially water soluble liquid and water reactive substrate comprises at least one material selected from the group consisting of a UV light protection filter, an antioxidant, a moisturizing substance, a deodorant, an antiperspirant active compound, a biogenic substance, an insect repellent active compound, a bleaching agent, an antioxidant, a bleach, an antibacterial substance, an antifungal substance, a flavor, a fragrance, an acid, an alkali, and an enzyme, and

wherein

the carrier is a precipitated silica,

a BET surface area of the precipitated silica is from 150 to 250 m2/g,

a particle size d 50 of the precipitated silica, determined by laser diffraction, is from 4 to 7 um, and

a DBP (dibutyl phthalate) absorption of the precipitated silica, in g DBP/100 g silica, is from 250 to 300.