# US 11,077,030 B2 · Sunscreen formulation

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- Number: US 11,077,030 B2
- Document ID: US11077030B2
- Status: Granted
- Kind: B2
- Application number: 16/581,998
- Filed: 2019-09-25
- Published: 2020-01-16
- Granted: 2021-08-03
- Earliest claimed: 2011-10-11
- Assignees: Fallien Cosmeceuticals, Ltd.
- Applicants: Fallien Cosmeceuticals, Ltd.
- Inventors: David J. Milora; Harry Fallick
- Web page: https://patentgrep.com/patent/US11077030B2

## CPC

- A61K 8/046: {Aerosols; Foams}
- A61K 8/0241: {Containing particulates characterized by their shape and/or structure (see also A61K8/04, A61K8/11, and A61K8/14, further aspects are classified in A61K2800/40 and subcodes)}
- A61K 8/19: containing inorganic ingredients
- A61K 8/27: Zinc; Compounds thereof
- A61K 8/29: Titanium; Compounds thereof
- A61K 8/37: Esters of carboxylic acids
- A61K 8/375: {the alcohol moiety containing more than one hydroxy group}
- A61K 8/4993: {Derivatives containing from 2 to 10 oxyalkylene groups}
- A61K 8/60: Sugars; Derivatives thereof
- A61K 8/731: {Cellulose; Quaternized cellulose derivatives}
- A61K 8/8147: {Homopolymers or copolymers of acids; Metal or ammonium salts thereof, e.g. crotonic acid, (meth)acrylic acid; Compositions of derivatives of such polymers}
- A61K 8/8152: {Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers}
- A61K 8/8176: {Homopolymers of N-vinyl-pyrrolidones. Compositions of derivatives of such polymers}
- A61K 8/85: Polyesters
- A61K 8/86: Polyethers
- A61K 8/87: Polyurethanes
- A61Q 17/04: Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
- A61K 2800/21: Emulsions characterized by droplet sizes below 1 micron
- A61K 2800/52: Stabilizers
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS

## Abstract

The present application relates to sunscreen formulations, including foamable sunscreen formulations, that comprise zinc oxide and titanium dioxide particles, suitably in the size range of about 1-100 nm. The compositions suitably produce a minimal residual whitening effect when applied to a skin surface.

## Claims

### Claim 1

A sunscreen formulation consisting essentially of:
a. about 1 wt % to about 25 wt % active particles having a primary particle size of about 10 nm to about 500 nm;
b. about 0.1 wt % to about 20 wt % emulsion stabilizer;
c. about 0.01 wt % to about 30 wt % skin conditioner;
d. about 0.01 wt % to about 20 wt % emulsifier; and
e. about 0.05 wt % to about 20 wt % suspending agent,
wherein the formulation produces a minimal residual whitening effect when applied to a skin surface.

### Claim 2 (depends on 1)

The sunscreen formulation of claim 1, wherein the active particles have a primary particle size of about 10 nm to about 200 nm.

### Claim 3 (depends on 1)

The sunscreen formulation of claim 1, wherein the active particles comprise titanium dioxide particles, zinc oxide particles, or both.

### Claim 4 (depends on 1)

The sunscreen formulation of claim 1, wherein the active particles comprise about 1 wt % to about 10 wt % titanium dioxide particles.

### Claim 5 (depends on 1)

The sunscreen formulation of claim 1, wherein the active particles comprise about 1 wt % to about 20 wt % zinc oxide particles.

### Claim 6 (depends on 1)

The sunscreen formulation of claim 1, wherein the active particles comprise about 1 wt % to about 10 wt % titanium dioxide particles and about 1 wt % to about 10 wt % zinc oxide particles.

### Claim 7 (depends on 1)

The sunscreen formulation of claim 1, wherein the emulsion stabilizer is selected from microcrystalline cellulose, cellulose gum, xanthan gum, magnesium aluminum silicate, bentonite clay, hectorite clay, and combination thereof.

### Claim 8 (depends on 1)

The sunscreen formulation of claim 1, wherein the skin conditioner is selected from C12-15 alkyl benzoate, octyldodecyl neopentanoate, butyl octyl salicylate, caprylyl glycol, glycerin, fatty acid esters of C8 or greater, mineral oil, and combination thereof.

### Claim 9 (depends on 1)

The sunscreen formulation of claim 1, wherein the emulsifier is selected from glyceryl stearate, ceteareth-20, polysorbate 80, sodium lauryl sulfate, lecithin, and combination thereof.

### Claim 10 (depends on 1)

The sunscreen formulation of claim 1, wherein the suspending agent is selected from polyhydroxystearic acid, sodium polyacrylate polymer, methyl methacrylate crosspolymer, and combination thereof.

### Claim 11 (depends on 1)

The sunscreen formulation of claim 1, further consisting essentially of about 0.01 wt % to about 1 wt % iron oxide particles.

### Claim 12 (depends on 1)

The sunscreen formulation of claim 1, further consisting essentially of a film former.

### Claim 13 (depends on 12)

The sunscreen formulation of claim 12, wherein the film former is selected from polyurethane-2, polymethyl methacrylate, tricontanyl poly(vinyl pyrollidone) (PVP), vinyl pyrollidone/eicosene copolymer, and combination thereof.

### Claim 14

A sunscreen formulation consisting essentially of:
a. about 1 wt % to about 25 wt % zinc oxide particles having a primary particle size of about 10 nm to about 500 nm; about 1 wt % to about 25 wt % titanium dioxide particles having a primary particle size of about 10 nm to about 500 nm; or a combination thereof;
b. an emulsion stabilizer;
c. a skin conditioner;
d. an emulsifier; and
e. a suspending agent,
wherein the formulation produces a minimal residual whitening effect when applied to a skin surface.

### Claim 15 (depends on 14)

The sunscreen formulation of claim 14, wherein the emulsion stabilizer is selected from microcrystalline cellulose, cellulose gum, xanthan gum, magnesium aluminum silicate, bentonite clay, hectorite clay, and combination thereof.

### Claim 16 (depends on 14)

The sunscreen formulation of claim 14, wherein the skin conditioner is selected from C12-15 alkyl benzoate, octyldodecyl neopentanoate, butyl octyl salicylate, caprylyl glycol, glycerin, fatty acid esters of C8 or greater, mineral oil, and combination thereof.

### Claim 17 (depends on 14)

The sunscreen formulation of claim 14, wherein the emulsifier is selected from glyceryl stearate, ceteareth-20, polysorbate 80, sodium lauryl sulfate, lecithin, and combination thereof.

### Claim 18 (depends on 14)

The sunscreen formulation of claim 14, wherein the suspending agent is selected from polyhydroxystearic acid, sodium polyacrylate polymer, methyl methacrylate crosspolymer, and combination thereof.

### Claim 19

A sunscreen formulation consisting essentially of:
a. about 1 wt % to about 25 wt % zinc oxide particles having a primary particle size of about 10 nm to about 500 nm; about 1 wt % to about 25 wt % titanium dioxide particles having a primary particle size of about 10 nm to about 500 nm; or a combination thereof;
b. about 0.1 wt % to about 20 wt % emulsion stabilizer;
c. about 0.01 wt % to about 30 wt % skin conditioner; and
d. about 0.01 wt % to about 20 wt % emulsifier,
wherein the formulation produces a minimal residual whitening effect when applied to a skin surface.

### Claim 20 (depends on 19)

The sunscreen formulation of claim 19, further consisting essentially of a suspending agent, a film former, or both.