Porous particles loaded with cosmetically or pharmaceutically active compounds

Abstract

Individualized porous particles have a volume-average diameter of less than or equal to 10 μm and a specific surface area of greater than or equal to 1 m 2 /g, and include at least one cosmetically or pharmaceutically active compound present at least inside the particles.

1 . Individualized porous particles, characterized in that they have a volume-average diameter of less than or equal to 10 μm and a specific surface area of greater than or equal to 1 m 2 /g, and in that they comprise at least one cosmetically or pharmaceutically active compound at least present inside said particles said compound being chosen from antibacterial agents, antifungal agents, sebum regulators, sebum stimulators, anti-skin ageing agents, in particular keratolytic or prodesquamating agents, agents for treating acne, antibiotics, hair loss inhibitors/hair-growth stimulators, agents which inhibit the growth of head hair or of body hair, anti-dandruff agents, antioxidants, astringents, pore-reducing agents, antiperspirant agents, vitamins, anti-inflammatory agents, and mixtures thereof. 
   
   
       2 . Individualized porous particles, characterized in that they have a volume-average diameter of less than or equal to 10 μm and a specific surface area of greater than or equal to 1 m 2 /g, in that they derive from organic porous particles chosen from particles of Nylon 6, Nylon 6-6, Nylon 12 and Nylon 6-12, and in that they comprise at least one cosmetically or pharmaceutically active compound at least present inside said particles, said compound being chosen from keratolytic or prodesquamating agents. 
   
   
       3 . Particles according to  claim 1 , having a mass by volume ranging from 0.2 to 5 g/cm 3 . 
   
   
       4 . Particles according to  claim 2 , having a mass by volume ranging from 0.2 to 5 g/cm 3 . 
   
   
       5 . Particles according to  claim 1 , having a polydispersity index less than or equal to 3. 
   
   
       6 . Particles according to  claim 2 , having a polydispersity index less than or equal to 3. 
   
   
       7 . Particles according to  claim 1 , wherein the particles derive from organic porous particles. 
   
   
       8 . Particles according to  claim 1 , wherein the particles derive from inorganic porous particles. 
   
   
       9 . Particles according to  claim 1 , wherein the particles derive from porous particles made of an organic and inorganic composite material. 
   
   
       10 . Particles according to  claim 1 , wherein the ratio by weight of the active compound(s) to the porous particles not loaded with active compound(s) is from 1/100 to 1/1. 
   
   
       11 . Particles according to  claim 2 , wherein the ratio by weight of the active compound(s) to the porous particles not loaded with active compound(s) is from 1/100 to 1/1. 
   
   
       12 . Cosmetic or pharmaceutical composition, comprising the particles according to  claim 1 . 
   
   
       13 . Cosmetic or pharmaceutical composition, comprising the particles according to  claim 2 . 
   
   
       14 . Method for administering a cosmetically or pharmaceutically active compounds into the pilosebaceous unit comprising at least the step of topically applying on the surface of the skin individualized porous particles according to  claim 1 . 
   
   
       15 . Method for administering a cosmetically or pharmaceutically active compounds into the pilosebaceous unit comprising at least the step of topically applying on the surface of the skin individualized porous particles according  claim 2   
   
   
       16 . Method for administering a cosmetically or pharmaceutically active compounds into the pilosebaceous unit comprising at least the step of topically applying on the surface of the skin cosmetic or pharmaceutical composition according to  claim 12 . 
   
   
       17 . Method for administering a cosmetically or pharmaceutically active compounds into the pilosebaceous unit comprising at least the step of topically applying on the surface of the skin cosmetic or pharmaceutical composition according to  claim 13 .