EP-4739399-A2 - METHODS AND COMPOSITIONS FOR ULTRAVIOLET PROTECTION OF SKIN

Abstract

The present invention relates generally to methods and compositions useful for protecting skin from UV radiation. Compositions include sunscreen compositions having at least one high molecular weight acrylate copolymer, an ammonium acryloyldimethyltaurate/vinylpyrrolidone copolymer, and at least one ultraviolet filter.

Inventors

• ZHAO, WANLI
• ZUBER, DOUG

Assignees

• Mary Kay, Inc.

Dates

Publication Date

20260513

Application Date

20240703

Claims (20)

1. 1. A sunscreen composition, wherein the sunscreen composition comprises at least one high molecular weight acrylate copolymer, an ammonium acryloyldimethyltaurate/vinylpyrrolidone copolymer, and at least one ultraviolet filter.
2. 2. The sunscreen composition of claim 1, wherein the high molecular weight acrylate copolymer comprises an aery lates/C 10-30 alkyl acrylate crosspolymer.
3. 3. The sunscreen composition of claim 1 , wherein the ultraviolet filter comprises avobenzone, octocrylene, and/or octisalate.
4. 4. The sunscreen composition of claim 1, wherein the sunscreen composition does not comprise homosalate.
5. 5. The sunscreen of claim 1, wherein the sunscreen composition does not comprise a vinylpyrrolidone/eicosane copolymer.
6. 6. The sunscreen of claim 1, wherein the sunscreen does not comprise additional emulsifiers.
7. 7. The sunscreen composition of claim 1, wherein the sunscreen composition further comprises cetearyl alcohol.
8. 8. The sunscreen composition of claim 1 , wherein the sunscreen composition comprises 0.01 to 1 % by weight of the high molecular weight acrylate copolymer(s).
9. 9. The sunscreen composition of claim 1, wherein the sunscreen composition comprises 0.01 to 1 % by weight of the ammonium acryloyldimethyltaurate/vinylpyrrolidone copolymer.
10. 10. The sunscreen composition of claim 1, wherein the sunscreen composition comprises 3 to 20 % by weight of the ultraviolet filter(s).
11. 11. The sunscreen composition of claim 1 , wherein the sunscreen composition has a sun protection factor of more than 30.
12. 12. The sunscreen composition of claim 1, wherein the sunscreen composition has a sun protection factor of more than 50.
13. 13. The sunscreen composition of claim 1, wherein the sunscreen composition has a sun protection factor of more than 30 after 80 minutes of water exposure.
14. 14. The sunscreen composition of claim 1, wherein the sunscreen composition has a sun protection factor of more than 50 after 80 minutes of water exposure.
15. 15. The sunscreen composition of claim 1, wherein the sunscreen composition is a polymeric suspension.
16. 16. A method of protecting an individual’s skin from ultraviolet radiation, the method comprising applying an effective amount of the sunscreen composition of claim 1 to the skin.
17. 17. The method of claim 16, wherein the sunscreen composition is applied prior to the skin being exposed to water.
18. 18. The method of claim 16, wherein applying the sunscreen creates a uniform hydrophobic layer.
19. 19. The method of claim 16, wherein the individual’s skin comprises facial skin.
20. 20. The method of claim 19, wherein the sunscreen composition does not comprise a vinylpyrrolidone/eicosane copolymer.

Description

DESCRIPTION METHODS AND COMPOSITIONS FOR ULTRAVIOLET PROTECTION OF SKIN CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of priority to U.S. Provisional Patent Application Serial No. 63/525,403, filed July 7, 2023, hereby incorporated by reference in its entirety. BACKGROUND OF THE INVENTION A. Field of the Invention [0002] The present invention relates generally to compositions and methods for blocking and protecting skin from ultraviolet (UV) radiation. More particularly, it concerns topical compositions comprising copolymers and UV filters. B. Description of Related Art [0003] Certain sunscreen compositions are known in the art. Many traditional sunscreen compositions rely upon chemical ultraviolet (UV) radiation-filtering ingredients to elicit a suitable SPF for protecting skin from UV radiation exposure. These traditional sunscreen compositions produce a greasy, inelegant feel when applied to skin, due to the high concentration of chemical UV filters in the composition necessary to achieve a desired SPF value. [0004] One of the ingredients utilized as a UV filter and as a solubilizing agent for other chemical UV filters in sunscreen compositions is homosalate. Given the safety concerns regarding potential endocrine disrupting properties of homosalate, homosalate is not recommended for use in sunscreen compositions at concentrations of greater 10%. To reduce homosalate in sunscreen compositions but still maintain the desired SPF upon reduction or removal of the homosalate, oils can be added to the compositions. These oils added to replace the homosalate can increase the oily feel of the compositions when applied to skin. [0005] For UV-filtering ingredients to protect the skin evenly (e.g., to avoid variation in levels of UV damage or UV exposure), they must form a uniform layer of composition film covering the skin. Greasy or oily compositions do not spread uniformly on the skin and have a tendency to migrate and pool from point of application or a tendency to be easily removed from the skin. In addition to lacking a pharmaceutically or cosmetically elegant feel, sunscreen compositions having little to no homosalate may also exhibit a reduction in the effective SPF provided by the active UV-filtering ingredients. [0006] Others have attempted to create compositions and methods for protecting skin from UV radiation exposure from the sun when using reduced amounts of or no homosalate. Certain attempts have utilized various compositions including cyano-containing acrylates, nano-titanium dioxides, or polyester-5. However, many attempts have been ineffective, only addressed one or a few of the undesired outcomes, or have unacceptable side effects. Thus, there is a need for new pharmaceutically or cosmetically elegant sunscreen compositions that include little to no homosalate but remain effective at protecting skin from UV radiation. [0007] In addition, there are needs in the art for compositions with improved SPF ratings, and in particular there are needs for sunscreen compositions that have an improved SPF rating with high water resistance and are non-greasy and easily applicable. SUMMARY OF THE INVENTION [0008] The present invention achieves needs in the art by providing stable compositions that can also effectively block UV radiation. In particular, alkyl polymers have been found to provide stability to the composition and increase the sun protection factor without the need for additional UV filters. [0009] In one instance, there is disclosed a sunscreen composition. In one instance the sunscreen composition includes any one of, any combination of, or all of a UV filter, a high-molecular weight acrylate copolymer, and an ammonium acryloyldimethyltaurate/vinylpyrrolidone copolymer. The amounts of the ingredients within the composition can vary (e.g., amounts can be as low as 0.000001% to as high as 80% w/w or any range therein). In one instance the composition includes at least one high molecular weight acrylate copolymer, an ammonium acryloyldimethyltaurate/vinylpyrrolidone copolymer, and at least one ultraviolet filter. The composition may further comprise one or more ingredients described herein. For example, the composition may comprise one or more additional ingredients selected from one or more conditioning agents, moisturizing agents, pH adjusters, structuring agents, inorganic salts, and preservatives. [0010] Methods of use for the compositions disclosed herein are also disclosed. In one aspect, the compositions disclosed are sunscreens. In some instances, the method comprises topically applying any one of the compositions disclosed herein to skin and/or the face and/or eye area in need thereof. In one aspect, any one of the compositions disclosed herein are topically applied and the composition is left on the application area, removed from the application area after a period of time, and/or removed directly after application. [0011] In particular aspects, the