ISOPROPYLCARBONATE BENZOYL PEROXIDE COMPOSITIONS AND METHODS OF USE

1 . A topically applicable composition comprising:

i) Isopropylcarbonate Benzoyl Peroxide;

ii) an opacifier; and

iii) a preserving agent.

2 . The topically applicable composition of claim 1 , wherein the composition comprises about 0.1% to about 10% by weight of Isopropylcarbonate Benzoyl Peroxide.

3 . The topically applicable composition of claim 1 , wherein the opacifier is bismuth oxychloride, titanium dioxide, fluorphlogopite, mica, iron oxide, nylon polymer, polymethyl methacrylate, boron nitride, kaolin, glycol distearate, styrene copolymer, a fatty alcohol, or any combination thereof.

4 . The topically applicable composition of claim 1 , wherein the composition comprises about 0.1% to about 2.5% by weight of the opacifier.

5 . The topically applicable composition of claim 1 , wherein the preserving agent is phenoxyethanol, potassium sorbate, benzyl alcohol, methyl paraben, chlorhexidine digluconate, chloroxylenol, chlorphenesin, dehydroacetic acid, diazolidinyl urea, DMDM hydantoin, ethylparaben, iodopropynyl butylcarbamate, methylisothiazolinone, propyllparaben, phenoxyethanol, phenoxyisopropanol, polyaminopropyl biguianide, sodium benzoate, salicylic acid, or any combination thereof.

6 . The topically applicable composition of claim 1 , wherein the composition comprises about 0.1% to about 0.8% by weight of the preserving agent.

7 . The topically applicable composition of claim 1 further comprising a surfactant selected from the group consisting of docusate sodium (diethylhexyl sodium sulfosuccinate), poloxamer, PEG ether, PPG ester, alkyl polyglucoside, sorbitan ester, ethoxylated sorbitan ester, alcohol sulfate, ethoxylated alcohol sulfate, alkyl benzene sulfonate, alpha olefin sulfonate, sulfosuccinate, isethionate ester, taurate, alkyl betaine, alkyl amidopropyl betaine, amphoacetate, and alkyl sultaine.

8 . The topically applicable composition of claim 1 further comprising a humectant.

9 . The topically applicable composition of claim 1 further comprising a liquid wetting surfactant.

10 . The topically applicable composition of claim 1 further comprising a gelling agent selected from the group consisting of acrylamide, sodium acryloyldimethyl taurate copolymer, isohexadecane, polysorbate 80, hydroxyethyl acrylate, and polysorbate 60.

11 . The topically applicable composition of claim 1 further comprising a pro-penetrating agent selected from the group consisting of propylene glycol, dipropylene glycol, propylene glycol dipelargonate, lauroglycol, an alcohol, an alkylmethyl sulfoxide, a polyol, oleic acid, isopropyl myristate, decylmethyl sulfoxide, DMSO, urea, and ethoxydiglycol.

12 . The topically applicable composition of claim 1 further comprising a sequestering agent selected from the group consisting of disodium ethylenediaminetetraacetic acid (EDTA), dihydroxyethylglycine, citric acid, and tartaric acid or a derivative or salt thereof.

13 . The topically applicable composition of claim 1 further comprising a keratolytic agent, an oil, an antioxidant, a skin conditioning agent, or any combination thereof.

14 . The topically applicable composition of claim 1 , wherein the opacifer is titanium dioxide, the preserving agent is phenoxyethanol, and the composition further comprises docusate sodium (diethylhexyl sodium sulfosuccinate) as a surfactant; glycerol as a humectant; poloxamer 124 as a liquid wetting surfactant; acrylamide/sodium acryloyldimethyl taurate copolymer and isohexadecane and polysorbate 80 as a gelling agent; propylene glycol as a pro-penetrating agent; disodium EDTA as a sequestering agent; and purified water as a vehicle.

15 . The topically applicable composition of claim 14 comprising:

i) about 3% by weight of the Isopropylcarbonate Benzoyl Peroxide;

ii) about 0.4% by weight of the titanium dioxide;

iii) about 0.4% by weight of the phenoxyethanol;

iv) about 0.05% by weight of the docusate sodium (diethylhexyl sodium sulfosuccinate) as a surfactant;

v) about 4% by weight of the glycerol;

vi) about 0.2% by weight of the poloxamer 124;

vii) about 4% by weight of the acrylamide/sodium acryloyldimethyl taurate copolymer and isohexadecane and polysorbate 80;

viii) about 4% by weight of the propylene glycol; and

ix) about 0.1% or about 0.2% by weight of the disodium EDTA.

16 . A method for producing an Isopropylcarbonate Benzoyl Peroxide aqueous gel, which method comprises the steps of:

solubilizing a sequestering agent in aqueous solution to produce the main phase;

preparing a disaggregation medium comprising Isopropylcarbonate Benzoyl Peroxide by dispersing Isopropylcarbonate Benzoyl Peroxide, propylene glycol, glycerol and liquid wetting surfactant in water to produce medium A; and

adding titanium dioxide to the main phase;

adding a first portion of gelling agent to the main phase;

adding medium A to the main phase;

adding of phenoxyethanol to the main phase;

solubilizing docusate sodium in water to provide solubilized docusate sodium followed by addition of the solubilized docusate sodium to the main phase by gentle agitation; and

adding a second portion of gelling agent to the main phase,

whereby a gel is formed.

17 . A method for treating common acne, comedones, polymorphous acne, nodulocystic acne, acne conglobata, or secondary acne afflicting the skin of an individual in need of such treatment, comprising topically administering to the individual a topically applicable composition according to claim 1 .

18 . A regimen for treatment of acne vulgaris, comprising,

cleaning skin; and

applying a topically applicable composition according to claim 1 to the skin.

19 . A kit comprising

a) a topically applicable composition according to claim 1 ; and

b) a topical cleanser and/or a topical moisturizer.

20 . The kit of claim 19 , wherein the facial cleaner and/or the facial moisturizer comprise salicylic acid, benzoyl peroxide, or adapalene.