Sunscreen compositions and methods and materials for producing the same
AssigneeThe C. P. Hall Company
InventorsCraig A. Bonda, Urvil B. Shah, Robert J. Mcmillin, Magda M. Roth
Life of this patent
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Abstract
A method of preparing a sunscreen including a solvent system and a filter system, the method including the step of controlling the polarity of the solvent system to control the rate of photodecay of the filter system, as well as sunscreen compositions and compounds for producing sunscreen compositions, are disclosed.
Claims69
A sunscreen composition, comprising a filter system consisting essentially of one or more photoactive compounds selected tom the group consisting of p-aminobenzoic acid and salts and derivatives thereof;
- anthranilate and derivatives thereof;
- salicylate and derivatives thereof;
- cinnamic acid and derivatives thereof;
- dihydroxycinnamic acid and derivatives thereof camphor and derivatives thereof;
- trihydroxycinnamic acid and derivatives thereof, dibenzalacetone naptholsulfonate and salts and derivatives thereof;
- benzalacetophenone naptholsulfonate and salts and derivatives thereof;
- dihydroxy-naphthoic acid and salts thereof;
- o-hyoxydiphenyldisulfonate and salts and derivatives thereof;
- p-hyoxydiphenyldisulfonate and salts and derivatives thereof;
- cournarin and derivatives thereof;
- diazoles derivatives;
- quinine derivatives and salts thereof, quinoline derivatives;
- hydroxy-substituted benzophenone derivatives;
- methoxy-substituted benzophenone derivatives;
- uric acid derivatives;
- vilouric acid derivatives;
- tannic acid and derivatives thereof;
- hydroquinone;
- benzophenone derivatives;
- and dibenzoylmethane derivatives, dissolved in a solvent system comprising a lipophilic organic compound, wherein a mixture of said filter system and said solvent system in the ratio present in said composition has a dielectric constant of at least about 8.
A sunscreen composition, comprising a filter system consisting essentially of one or more photoactive compounds selected from the group consisting of p-aminobenzoic acid and salts and derivatives thereof;
- anthranilate and derivatives thereof;
- salicylate and derivatives thereof;
- cinnamic acid and derivatives thereof;
- dihydoxycinnamic acid and derivatives thereof camphor and derivatives thereof;
- trihydroxycinnamic acid and derivatives thereof;
- dibenzalacetone naptholsulfonate and salts and derivatives thereof, benzalacetophenone naptholsulfonate and salts and derivatives thereof;
- dihydroxy-naphtoic acid and salts thereof;
- o-hyoxydiphenyldisulfonate and salts and derivatives thereof;
- p-hyoxydiphenyldisulfonate and salts and derivatives thereof;
- cournarin and derivatives thereof;
- diazoles derivatives;
- quinine derivatives and salts thereof;
- quinoline derivatives;
- hydroxy-substituted benzophenone derivatives;
- methoxy-substituted benzophenone derivatives;
- uric acid derivatives;
- vilourio acid derivatives;
- tannic acid and derivatives thereof;
- hydroquinone;
- benzophenone derivatives;
- and dibenzoylmethane derivatives, and a solvent system comprising a compound of formula I:
- wherein R1 is selected from the group consisting of C1-C8 alkyl and R2 is selected from the group consisting of C3-C30 alkyl, C3-C30 alkenyl, aryl, and C3-C8 cycloalkyl.
A sunscreen composition comprising a filter system comprising a photoactive compound, and a solvent system comprising a compound selected from the group consisting of dibutyloctyl malate, diisoamyl malate, and combinations thereof.
A malate ester of the structure of formula II,
- wherein R3 is n-butyl alkyl and R4 is n-hexyl alkyl.
A sunscreen composition, comprising a selected amount of a filter system comprising a photoactive compound, and a selected amount of a solvent system comprising a lipophilic organic compound, wherein the rate constant of photodecay of said filter system is about 150% or less of the theoretical minimum rate constant of photodecay.
Dependencies are inferred from the claim text.