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US 5,632,996 AGranted
Benzoyl peroxide and benzoate ester containing compositions suitable for contact with skin
AssigneeImaginative Research Associates, Inc.
InventorsJose E. Ramirez, Mohan Vishnupad
Life of this patent
Estimating the term…
Abstract
Non-irritating compositions containing benzoyl peroxide and a non-irritating benzoic acid ester are useful in preparing products suitable for use in contact with the skin.
Claims25
A composition for contact with skin comprising:
- benzoyl peroxide;
- and
- a mixture of non-irritating long chain alkyl benzoates, the composition being substantially anhydrous.
A cleansing composition comprising:
- benzoyl peroxide;
- a mixture of non-irritating long chain alkyl benzoates;
- and
- a cleansing agent selected from the group consisting of soap and synthetic detergents.
1 more element
A method of preparing a cleansing composition comprising
- mixing benzoyl peroxide with a combination of non-irritating long chain alkyl benzoate esters to provide a mixture;
- and
- combining the mixture with at least one cleansing agent selected from the group consisting of soaps and synthetic detergents.
A method of treating ache comprising
- preparing a composition containing benzoyl peroxide and a mixture of non-irritating long chain alkyl benzoates;
- and
- contacting the composition with the skin of a person afflicted with acne.
A method for obtaining purified benzoyl peroxide comprising:
- mixing wet benzoyl peroxide crystal with a benzoic acid ester;
- filtering off water to provide a substantially anhydrous mixture of benzoyl peroxide and benzoic acid ester;
- contacting the substantially anhydrous mixture with a solvent to dissolve the benzoic ester;
- and
- removing the solvent to recover substantially pure solid benzoyl peroxide.
2 more elements
Dependencies are inferred from the claim text.