Sunscreen compositions containing a dibenzoylmethane derivative
AssigneeJohnson & Johnson Consumer Companies, Inc.
InventorsCurtis Cole, Florence Natter
Life of this patent
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Abstract
The present invention relates to a method of photostabilizing a composition comprising (a) one or more dibenzoylmethane derivative UV-A absorbing agent(s); (b) one or more benzophenone derivative(s); and (c) a diester or polyester of a naphthalene dicarboxylic acid and a method of protecting mammalian skin or hair from UV radiation comprising topically applying to the skin or hair such a composition.
Claims21
A method of stabilizing a composition comprising a dibenzoylmethane derivative UV-A absorbing agent, said method comprising the steps of:
- (a) adding to said composition:
- (i) a diester or polyester of a naphthalene dicarboxylic acid;
- and
- (ii) benzophenone derivative;
- (b) exposing said composition to at least 50 Joules/cm2 of sunlight or simulated sunlight;
- wherein (i) and (ii) are present in amounts sufficient to provide a PFA value after said exposing step that is minimally 60% of the PFA value before said exposing step.
A composition comprising:
- (a) a dibenzoylmethane derivative UV-A absorbing agent;
- (b) a diester or polyester of a naphthalene dicarboxylic acid;
- and
- (c) a benzophenone derivative;
- wherein the diester or polyester of naphthalene dicarboxylic acid and benzophenone derivative are present in an amount sufficient to provide a PFA value after exposure to at least 50 Joules/cm2 of simulated sunlight that is minimally 60% of the original PFA value before exposure.
A method of protecting mammalian skin or hair from UV radiation, comprising the steps of:
- (a) providing a composition comprising:
- (i) a diester polyester of a naphthalene dicarboxylic acid;
- (ii) a benzophenone derivative;
- and
- (iii) a dibenzoylmethane derivative UV-A absorbing agent;
- (b) topically applying said composition to said skin or hair;
- and
- (c) exposing said skin or hair to at least 50 Joules/cm2 of simulated sunlight.
Dependencies are inferred from the claim text.