Water-in-oil microemulsions for cosmetic uses

Claim 2

A stable water-in-oil microemulsion non-irritating moisturizing composition which when applied to skin promotes the penetration of moisturizers into the skin and leaves little residue on the surface of the skin following its application comprising from about 5% by weight to about 35% by weight of a moisturizer, from about 20% by weight to about 80% by weight of surfactants, from about 10% by weight to about 70% by weight of skin compatible oils, and from about 5% by weight to about 50% by weight of skin humectants and the composition having an average droplet size in the range of about 0.001 microns to about 0.2 microns in diameter, and wherein the compositon is adapted to promote the penetration of the moisturizers into the skin.

Claim 3

The composition of claim 1 comprising from about 15% by weight to about 30% by weight of a moisturizer, from about 20% by weight to about 35% by weight of surfactants and cosurfactants, from about 20% by weight to about 55% by weight, of oils and from about 20% by weight to about 35% by weight of skin humectants.

Claim 4

The composition of claim 2 comprising as additional ingredients from about 0.1% by weight to about 1.0% by weight of preservatives.

Claim 5

The composition of claim 3 consisting essentially of the following ingredients: ______________________________________ Weight Classification Ingredient Percent ______________________________________ oil cyclomethicone 25.0 moisturizers squalane 19.7 Polawax 2.0 isopropyl 3.0 myristate skin humectants water 22.8 glycerine 2.0 surfactant polysorbate 21 25.0 preservatives methylparaben 0.15 propylparaben 0.15 imidazolidinyl urea 0.2 ______________________________________

Claim 6

The composition of claim 3 consisting ssentially of the following ingredients: ______________________________________ Weight Classification Ingredient Percent ______________________________________ oil cyclomethicone 20.0 moisturizers squalane 14.7 Polawax 2.0 isopropyl 3.0 myristate jojoba oil 10.0 skin humectants water 20.8 glycerine 4.0 surfactant polysorbate 21 25.0 preservatives methylparaben 0.15 propylparaben 0.15 imidazolidinyl urea 0.2 ______________________________________

Claim 7

The composition of claim 3 consisting essentially of the following ingredients: ______________________________________ Weight Classification Ingredient Percent ______________________________________ oil cyclomethicone 20.0 moisturizers squalane 12.9 isopropyl 3.0 myristate jojoba oil 10.0 skin humectants water 24.4 propylene glycol 2.0 surfactants polysorbate 21 25.0 myristyl alcohol 1.0 cetyl alcohol 0.6 polysorbate 60 0.4 preservatives methylparaben 0.3 propylparaben 0.1 imidazolidinyl urea 0.3 ______________________________________

Claim 8

The composition of claim 3 consisting essentially of the following ingredients: ______________________________________ Weight Classification Ingredient Percent ______________________________________ oil cyclomethicone 20.0 moisturizers squalane 14.85 isopropyl 3.0 myristate jojoba oil 10.0 skin humectants water 22.6 glycerine 2.0 surfactants polysorbate 21 27.0 sodium dodecyl 0.05 sulfate preservatives methylparaben 0.15 propylparaben 0.15 imidazolidinyl urea 0.2 ______________________________________

Claim 9

A stable water-in-oil microemulsion non-irritating sunscreen composition which when applied to skin promotes the penetration of sunscreen into the skin and leaves little residue on the surface of the skin following its application comprising from about 1% by weight to about 8% by weight of a sunscreen, from about 15% by weight to about 79% by weight of surfactants, from about 15% by weight to about 79% by weight of skin compatible oils, and from about 5% by weight to about 50% by weight of skin humectants and the composition having an average droplet size in the range of about 0.001 microns to about 0.2 microns in diameter, and wherein the composition is adapted to promote the penetration of sunscreen to the skin.

Claim 10

A stable water-in-oil microemulsion non-irritating sunscreen composition which when applied to skin promotes the penetration of sunscreen into the skin and leaves little residue on the surface of the skin following its application comprising from about 1% by weight to about 8% by weight of a sunscreen, from about 15% by weight to about 79% by weight of surfactants, from about 15% by weight to about 79% by weight of skin compatible oils, and from about 5% by weight to about 50% by weight of skin humectants and the composition having an average droplet size in the range of about 0.001 microns to about 0.2 microns in diameter, and wherein the composition is adapted to promote the penetration of sunscreen to the skin.

Claim 11

The composition of claim 8 comprising from about 2% by weight to about 6% by weight of a sunscreen, from about 20% by weight to about 35% by weight of surfactants and cosurfactants, from about 20% by weight to about 55% by weight of oils and from about 20% by weight to about 35% by weight of skin humectants.

Claim 12

A composition of claim 9 comprising as additional ingredients from about 15% by weight to about 20% by weight of moisturizers.

Claim 13

A composition of claim 10 comprising as additional ingredients from about 0.1% by weight to about 1.0% by weight of preservatives.

Claim 14

The composition of claim 11 consisting essentially of the following ingredients: ______________________________________ Weight Classification Ingredient Percent ______________________________________ oil cyclomethicone 26.0 moisturizers squalane 15.7 isopropyl 3.0 myristate sunscreens p-(2-ethylhexyl)- 3.0 dimethylaminobenzoate benzophenone-3 2.0 skin humectants water 24.8 surfactant polysorbate 21 25.0 preservatives methylparaben 0.15 propylparaben 0.15 imidazolidinyl urea 0.2 ______________________________________

Claim 15

The composition of claim 11 consisting essentially of the following ingredients: ______________________________________ Weight Classification Ingredient Percent ______________________________________ oil cyclomethicone 26.0 moisturizers squalane 15.7 isopropyl 3.0 myristate sunscreens p-(2-ethylhexyl)- 3.0 dimethylaminobenzoate benzophenone-3 2.0 skin humectants water 24.8 surfactants polysorbate 21 24.8 sodium dodecyl 0.2 sulfate preservatives methylparaben 0.15 propylparaben 0.15 imidazolidinyl urea 0.2 ______________________________________

Claim 16

The composition of claim 1 in which the surfactants are non-ionic.

Claim 17

The composition of claim 2 in which the surfactants and non-ionic.

Claim 18

The composition of claim 8 in which the surfactants are non-ionic.

Claim 19

The composition of claim 9 in which the surfactants are non-ionic.

Claim 20

A composition according to claim 1 in which the content of skin humectants is from about 5% by weight to about 35% by weight of the composition.

Claim 21

A composition according to claim 8 in which the content of skin humectants is from about 5% by weight to about 35% by weight of the composition.

Claim 22

A composition according to claim 19 in which the content of surfactants is greater than 20% by weight of the composition.