Topical application of chromophores for hair removal

Details Topical application of chromophores for hair removal Topical application of chromophores for hair removal

A - Human Necessities

61

K

A61K 8/49 (2006.01) A61K 8/04 (2006.01) A61Q 9/00 (2006.01) A61Q 9/04 (2006.01)

Patent

CA 2462120

A device and method is disclosed for permanent or semi-permanent removal of hair through the activation of microparticles introduced into hair follicles. Microparticles are incorporated into a composition that is topically applied to the skin. These microparticles containing or consisting of chromophores or chemically activated molecules are of a variety of shapes and sizes. Microparticles are within a size range of 1 micron to 70 microns, and preferably between 10 and 50 microns. Microparticles of this size and variety of shapes enter hair follicles on all areas of the skin without entering other areas of the skin, such as the stratum corneum or sweat gland channels. Treatment of the skin with electromagnetic radiation, ultrasonic radiation or chemical means activates the chromophore or chemically activated compounds, thus destroying the hair follicle without damaging other areas of the skin. In another embodiment, microparticles further contain nanoparticles released further into the hair follicle by use of a solvent or other method, allowing chromophores or chemically activated molecules to penetrate deeper into the follicle and avoid structures such as the sebaceous gland.

L'invention porte sur un procédé et un dispositif s'appliquant à l'épilation permanente ou semi-permanente par activation de microparticules introduites dans le follicule pileux. Selon ce procédé, on incorpore des microparticules dans une composition appliquée pour agir localement sur la peau. Ces microparticules contenant ou constituées de chromophores ou de molécules activée chimiquement sont de forme et de taille variables. La grosseur des microparticules est comprise entre 1 micron et 70 microns, de préférence entre 10 et 50 microns. Les microparticules de taille et de forme variables pénètrent dans le follicule pileux sur toute la surface de la peau sans pénétrer dans d'autres zones telles que la couche cornée de l'épiderme ou les canaux des glandes sudoripares. Le traitement par radiation électromagnétique, ultrasonique ou moyens chimiques active les chromophores ou les composés activés chimiquement, ce qui détruit le follicule pileux sans endommager d'autres zones de la peau. Selon une autre réalisation, les microparticules contiennent également des nanoparticles libérées dans le follicule pileux au moyen d'un solvant ou autre procédé, ce qui permet aux chromophores ou aux molécules activées chimiquement de pénétrer plus profondément dans le follicule pileux et d'éviter des structures telles que les glandes sébacées.

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