Photostable uv protection compositions

A - Human Necessities – 61 – K

Patent

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Details

A61K 8/35 (2006.01) A61K 8/37 (2006.01) A61Q 17/04 (2006.01)

Patent

CA 2361550

The present invention relates to photostable compositions suitable for providing protection against the harmful effects of ultraviolet radiation. The compositions provide excellent efficiency and broad spectrum UV efficacy while exhibiting improved photostability. Methods of use for these compositions are also disclosed. The present compositions comprise: a) an effective amount of a UVA-absorbing dibenzoylmethane sunscreen active; b) a photostabilizing system consisting essentially of an effective amount of 2-ethylhexyl-p-methoxycinnamate; and c) a suitable carrier; wherein the mole ratio of 2-ethylhexyl-p-methoxycinnamate to the dibenzoylmethane sunscreen active is from about 0.15:1 to about 1:1.

L'invention concerne des compositions photostables de protection contre les effets nocifs des rayons ultraviolets. Ces compositions sont extrêmement efficaces, possèdent un large spectre d'efficacité contre les ultraviolets, tout en présentant une photostabilité améliorée. Elle concerne également des procédés d'utilisation de ces compositions. Ces dernières contiennent: (a) une quantité efficace d'un écran solaire actif de dibenzoylméthane absorbant les ultraviolets; (b) un système photostabilisant constitué essentiellement par une quantité efficace de 2-éthylhexyl-p-méthoxycinnamate; (c) un véhicule adéquat; le rapport molaire entre 2-éthylhexyl-p-méthoxycinnamate et l'écran solaire actif de dibenzoylméthane étant situé entre 0,15:1 et 1:1.

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