Skin care and sunscreen composition containing dibenzoylmethane derivative, e.g., parsol.RTM. 1789, and C.sub.12, C.sub.16, C.sub.18 branched chain hydroxybenzoate and/or C.sub.12, C.sub.16 branched chain benzoate stabilizers/solubilizers
AssigneeThe C. P. Hall Company
InventorsCriag A. Bonda, Steven P. Hopper
Life of this patent
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Abstract
A sunscreen composition containing a UV-A dibenzoylmethane derivative, such as 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane (PARSOL.RTM. 1789), and a stabilizer/solubilizer for the dibenzoylmethane derivative having formula (I): ##STR1## These long branched chain alkyl salicylates having a C.sub.4 branch at the 2 position are quite effective in stabilizing the dibenzoylmethane derivative UV-B filter compounds making them more effective; effective for longer periods of time.
Claims30
A sunscreen composition having an SPF of at least 25, for topical application to human skin for protection against ultraviolet radiation and to provide skin moisturizing and elegant skin feel comprising, in a cosmetically acceptable carrier, at least about 0.5% by weight of a dibenzoylmethane derivative and at least about 0.5% by weight of a branched chain alkyl salicylate stabilizing compound of formula (I):
- ##STR11##
A method of filtering out ultraviolet radiation from human skin comprising topically applying to said skin a composition, in a cosmetically acceptable carrier, comprising 1% to 4% by weight of a dibenzoylmethane derivative and at least 1% by weight of a branched chain alkyl salicylate stabilizing compound of formula (I):
- ##STR12##
A composition having emollient and sunscreen activity of at least SPF 25 comprising a mixture of a compound of formula (I) and a compound of formula (II) in a weight ratio of (I):(II) in the range of 1:3 to 3:1 ##STR13##
A moisturizing sunscreen composition having the following composition:
- ______________________________________ Chemical Name % W/W ______________________________________ Octyl methoxycinnamate 0-10 Butyloctyl salicylate 1-15 Octyl salicylate 0-10 Hexyldecyl benzoate & 0-10 Butyloctyl benzoate Avobenzone 0.5-5 Polyvinylpyrrolidone Eicosene 0-2 copolymer Dimethicone copolyol 0-2 Isopropyl myristate 0-5 Oxybenzone 0-10 Hydroxypropyl methylcellulose 0-2 Sorbitan oleate 0-5 Acrylate/C.sub.10-30 alkyl acrylate 0-5 crosspolymer Silica 0-5 Water 50-90 Carbomer 0-2 Disodium EDTA 0-2 Glycerin 0-10 Butylene glycol 0-5 Phenoxyethanol ()methyl - 0-5 paraben () ethylparaben ()propyl - paraben () butylparaben Panthenol and propylene glycol 0-5 Triethanolamine 0-5 ______________________________________
Dependencies are inferred from the claim text.