Composite uv sunblock compositions

Details Composite uv sunblock compositions Composite uv sunblock compositions

A - Human Necessities

61

K

A61K 8/92 (2006.01) A61K 8/04 (2006.01) A61K 8/27 (2006.01) A61K 8/31 (2006.01) A61K 8/35 (2006.01) A61K 8/37 (2006.01) A61K 8/40 (2006.01) A61K 8/44 (2006.01) A61K 8/49 (2006.01) A61Q 17/04 (2006.01)

Patent

CA 2188166

The invention encompasses topical sunblock formulae for shielding skin from ultraviolet radiation, and a composite sunblocking component thereof. The sunblocking component of the formula includes an effective amount of a plurality of particles having diameters in the range of about 0.01 - 100 microns, each particle including a matrix and a UV-attenuating compound incorporated into the matrix. The composite sunblocking component may include a particle that is colored or transparent, depending upon the matrix, UV-attenuating compound and the particle size. The sunblocking component is dispersible in water and thus in water-based dermatological carriers. The formula includes these particles dispersed within a dermatologically acceptable liquid carrier in at least an amount sufficient to shield substantially all of the skin over which the formula is applied from hazardous effects of ultraviolet radiation.

L'invention concerne des compositions d'écran total s'appliquant localement, afin de protéger la peau contre les rayons ultraviolets, ainsi qu'un constituant composite d'écran total de ladite composition. Ce constituant comprend une quantité efficace d'une pluralité de particules, dont les diamètres se situent entre 0,01 et 100 microns environ, chaque particule possédant une matrice dans laquelle est incorporé un composé atténuant les ultraviolets. Ce constituant peut également comprendre une particule colorée ou transparente, en fonction de la matrice, du composé atténuant les ultraviolets et de la dimension des particules. Il peut se disperser dans l'eau et, par conséquent, dans des véhicules dermatologiques à base aqueuse. Dans la composition, lesdites particules sont dispersées à l'intérieur d'un véhicule liquide acceptable dermatologiquement, au moins en une quantité suffisante pour effectuer la protection quasi totale de la zone de la peau sur laquelle on applique ladite composition contre les effets dangereux des rayons ultraviolets.

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