Sunless tanning composition with photostabilized sunscreen

A - Human Necessities – 61 – K

Patent

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Details

A61K 8/35 (2006.01) A61K 8/37 (2006.01) A61Q 19/04 (2006.01)

Patent

CA 2697945

In one aspect, a cosmetic composition includes a sunless tanning agent and a sunscreen agent. A photostabilizer is added to stabilize the sunscreen agent from the destabilizing effect of the sunless tanning agent. In this manner, UV protection is provided to the user when the cosmetic composition is applied to skin. In another aspect, a water-based sunless tanning/sunscreen composition includes a sunless tanning agent, a sunscreen agent, and a photostabilizer. The sunless tanning agent is DHA, and the sunscreen is avobenzone. Because the avobenzone degrades when exposed to UV radiation when used with DHA, the photostabilizer is added to enable the avobenzone to retain most of its original ability to absorb the UV radiation. The photostabilizer is a low molecular weight copolymer of adipic acid and neopentyl glycol.

Selon un aspect, l'invention concerne une composition cosmétique comprenant agent bronzant sans soleil et un agent écran solaire. Un photostabilisant est ajouté pour stabiliser l'agent d'écran solaire contre l'effet déstabilisant de l'agent bronzant sans soleil. De cette manière, une protection UV est assurée à l'utilisateur lorsque la composition cosmétique est appliquée sur la peau. Selon un autre aspect, une composition de bronzage sans soleil/écran solaire à base aqueuse comprend un agent bronzant sans soleil, un agent écran solaire et un photostabilisant. L'agent bronzant sans soleil est la DHA, et l'écran solaire est l'avobenzone. Comme l'avobenzone se décompose lorsqu'il est exposé au rayonnement UV en association avec la DHA, le photostabilisant est ajouté pour permettre à l'avobenzone de conserver la majeure partie de sa capacité d'origine à absorber le rayonnement UV. Le photostabilisant est un copolymère d'acide adipique et de néopentyl-glycol à poids moléculaire faible.

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