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US 11,229,590 B2Granted
Sunscreen formulation
OwnerYimin Suninventor
Life of this patent
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Abstract
The present invention relates to the synthesis of new classes of sunscreen agents, the usage of such sunscreen agents in sunscreen formulations aiming at reduction of sunscreen agents' skin penetration, and a formulation technology using existing sunscreen agents aiming at reduction of sunscreen agents' skin penetration, therefore improving the bio-safety of the sunscreen products.
Claims20
A sunscreen formulation comprising:
- (1) an ionic complex that is formed between a compound A and an excipient B;
- and
- (2) an aqueous based carrier for topical administration,
- wherein the compound A is a sunscreen compound in enol form or with an active acidic proton or derivatized with —[CH2]nCOOH or —[CH2]nNH2, wherein n is 0 to 18;
- wherein the excipient B contains an amine functional group when the sunscreen compound is in enol form or with an active acidic proton or derivatized with —[CH2]nCOOH, and/or wherein the excipient B contains a carboxyl functional group when the sunscreen compound is derivatized with —[CH2]nNH2;
- and
- wherein the formulation is substantially free of the compound A in a free form.
4 more elements
(4-aminomethoxy-2-hydroxy-phenyl) phenyl-methanone of the following formula:
Dependencies are inferred from the claim text.