초록 ▼

An emulsion comprising: water; hydrophilic particles; and hydrophobic particles; wherein the hydrophilic and hydrophobic particles form shells encapsulating a gas that are suspended in the water, said shells comprising an external layer of hydrophilic particles and an internal layer of hydrophobic p

An emulsion comprising: water; hydrophilic particles; and hydrophobic particles; wherein the hydrophilic and hydrophobic particles form shells encapsulating a gas that are suspended in the water, said shells comprising an external layer of hydrophilic particles and an internal layer of hydrophobic particles adjacent to the layer of hydrophilic particles.

대표청구항 ▼

The invention claimed is: 1. A powder comprising: water; hydrophilic oxide particles; and hydrophobic oxide particles; wherein the water is encapsulated in shells comprising an external layer of hydrophobic oxide particles and an internal layer of hydrophilic oxide particles adjacent to the layer o

The invention claimed is: 1. A powder comprising: water; hydrophilic oxide particles; and hydrophobic oxide particles; wherein the water is encapsulated in shells comprising an external layer of hydrophobic oxide particles and an internal layer of hydrophilic oxide particles adjacent to the layer of hydrophobic oxide particles. 2. A powder according to claim 1 wherein oxide hydrophilic particles are dispersed in the encapsulated water and form with the water a gel structure having filaments of oxide hydrophilic particles to which water molecules adhere. 3. A powder according to claim 1 wherein the hydrophobic oxide particles have a characteristic specific surface greater than about 100 m2/g. 4. A powder according to claim 2 wherein the hydrophobic oxide have a characteristic specific surface greater than about 100 m2/g. 5. A powder according to claim 1 wherein a relative concentration Cphil by weight of the oxide hydrophilic particles in the powder satisfies an equation Cphil=Kphil/Sphil where Sphil is a characteristic specific surface of the oxide hydrophilic particles and Kphil is a constant having a value between about 20 m2/g and about 50 m2/g. 6. A powder according to claim 5 wherein Kphil has a value between about 30 m2/g and about 40 m2/g. 7. A powder according to claim 1 wherein the hydrophilic oxide particles have a specific surface greater than about 100 m2/g. 8. A powder according to claim 5 wherein the hydrophilic oxide particles have a specific surface greater than about 100 m2/g. 9. A powder according to claim 6 wherein the hydrophilic oxide particles have a specific surface greater than about 100 m2/g. 10. A powder according to claim 1 wherein a characteristic diameter of hydrophilic oxide particles is between about 5 nm and about 150 nm. 11. A powder according to claim 2 wherein a characteristic diameter of hydrophilic oxide particles is between about 5 nm and about 150 nm. 12. A powder according to claim 1 wherein the shells have a characteristic average diameter in a range from about 1 micrometer to about 20 micrometers. 13. A powder according to claim 2 wherein the shells have a characteristic average diameter in a range from about 1 micrometer to about 20 micrometers. 14. A powder according to claim 1 wherein the hydrophilic oxide particles comprise oxide particles having surfaces covered with non-polar radicals. 15. A powder according to claim 14 wherein the hydrophilic oxide particles comprise a mix of hydrophilic oxide particles, said mix comprising a first type of hydrophilic oxide particles formed from particles based on a first oxide and at least one second type of hydrophilic oxide particles formed from particles based on a second oxide different from the first oxide. 16. A powder according to claim 14 wherein the oxide particles are selected from the group consisting of SiO2, Al2O3, TiO2, Fe2O3 and MnO particles. 17. A powder according to claim 14 wherein the polar radicals are selected from the group consisting of OH, CaCO3, CuSO4, and CaSO4. 18. A powder according to claim 1 wherein the hydrophobic oxide particles comprise oxide particles having surfaces covered with non-polar radicals. 19. A powder according to claim 18 wherein the hydrophobic oxide particles comprise a mix of hydrophobic oxide particles, said mix comprising a first type of hydrophobic oxide particles formed from particles based on a first oxide and at least one second type of hydrophobic oxide particles formed from particles based on a second oxide different from the first oxide. 20. A powder according to claim 18 wherein the oxide particles are selected from the group consisting of SiO2, Al2O3, TiO2, Fe2O3 or MnO particles. 21. A powder according to claim 1 wherein a substance beneficial for skin care is present in the water. 22. A powder according to claim 21 wherein the substance is an oil. 23. A powder according to claim 21 wherein the substance is vitamin A. 24. A powder according to claim 21 wherein the substance is beta carotine. 25. A method of reducing wrinkling in a region of skin comprising: applying a powder in accordance with claim 1 to the region so that shells in the powder rupture and release their water content and the released water, hydrophilic particles and hydrophobic particles in the ruptured cells form a layer on the region; and waiting a sufficient period of time so that at least portion of water in the layer is absorbed by the region and the volume of the layer shrinks so that the layer transforms into a network of strands on the region, which network is anchored to the skin by attraction of hydrophilic and hydrophobic particles to the skin and tends to contract as water is absorbed from the network. 26. A method according to claim 25 and comprising applying water to the region of skin after the network is formed so that the network absorbs water and expands and subsequently releases water to the skin and contracts again. 27. A method according to claim 25 and comprising applying a substance comprising a component that is absorbed by the network and the skin to the region of skin after the network is formed so that the network absorbs the component and expands and subsequently releases the component to the skin and contracts again. 28. A method according to claim 27 wherein the component is an oil. 29. A method according to claim 27 wherein the component is vitamin A. 30. A method according to claim 27 wherein the component is beta carotine. 31. A method of forming a powder comprising water, the method comprising: forming a solution of water and hydrophilic oxide particles; adding a quantity of hydrophobic oxide particles to the solution to form a mixture; causing the gas to cavitate so that droplets of the water are encapsulated in shells of hydrophilic and hydrophobic particles and wherein the amounts of hydrophobic and hydrophilic oxide particles in the mixture are enough to form a sufficient number of shells so that substantially all the water in the mixture can be contained in encapsulated water droplets.