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Sunscreen compositions, products and methods that include at least one UVA sunscreen active agent, at least one UVB sunscreen active agent, and one or more water insoluble film forming polymers. The compositions, products and methods may further include one or more active or inactive cosmetic ingredients. The water insoluble film forming polymers synergistically affect the UVA and UVB sunscreen active agents, in particularly the UVA sunscreen active agents by significantly enhancing the water resistance of the UVA sunscreen active agents after water exposure as determined by the SPF and UVAPF values measured before and after water exposure.

Titel:	Sunscreen compositions with improved water resistance of UVA sunscreen active agents
Autor/in / Beteiligte Person:	Edgewell Personal Care Brands, LLC
Link:	View record in USPTO Patent Grants (Volltext)
Veröffentlichung:	2020
Medientyp:	Patent
Sonstiges:	Nachgewiesen in: USPTO Patent Grants Sprachen: English Patent Number: 10638,990 Publication Date: May 05, 2020 Appl. No: 16/025204 Application Filed: July 02, 2018 Assignees: EDGEWELL PERSONAL CARE BRANDS, LLC (Chesterfield, MO, US) Claim: 1. A sunscreen composition comprising a first phase comprising one or more UVA sunscreen active agents; and a second phase comprising two or more water insoluble film forming polymers including trimethylsiloxysilicate and methyl dihydroabietate present in an aqueous emulsion, wherein said two or more water insoluble film forming polymers increase water resistance of said one or more UVA sunscreen active agents such that retention of UVAPF values after water exposure, as determined by UVAPF values measured before and after water exposure, is greater than at least 60%. Claim: 2. The sunscreen composition of claim 1 , wherein said two or more water insoluble film forming polymers increase water resistance of said one or more UVA sunscreen active agents such that retention of UVAPF values after water exposure, as determined by UVAPF values measured before and after water exposure, is greater than at least 70%. Claim: 3. The sunscreen composition of claim 1 , wherein said two or more water insoluble film forming polymers are present in an amount of about 0.5% to about 5.0%, based on the total weight of the sunscreen composition. Claim: 4. The sunscreen composition of claim 3 , wherein said two or more water insoluble film forming polymers are present in an amount of about 0.5% to about 2.0%, based on the total weight of the sunscreen composition. Claim: 5. The sunscreen composition of claim 1 , wherein the ratio of said trimethylsiloxysilicate to said methyl dihydroabietate is from about 1:4 to about 4:1. Claim: 6. A method of absorbing ultraviolet radiation on a keratinous substrate comprising applying a sunscreen composition according to claim 1 to a keratinous substrate and subjecting the keratinous substrate to ultraviolet radiation. Patent References Cited: 6123927 September 2000 Ogawa ; 2010/0266648 October 2010 Ranade ; 2011/0301247 December 2011 Hayakawa ; 2012/0189665 July 2012 Susak ; 2013/0195779 August 2013 Norman ; 2014/0030198 January 2014 Fares ; 2014/0170090 June 2014 Thaggard ; 2014/0186270 July 2014 Suleiman ; 2014/0348757 November 2014 Barrie ; 2015/0164773 June 2015 Mou ; H05262634 October 1993 ; 2011097448 August 2011 ; 2012078961 June 2012 ; 2012149355 November 2012 Other References: “Microscopic evaluation of polymeric film properties of anhydrous sunscreen compositions and their relation to absorption and their relation to absorption and water resistance.” Donald Prettypaul, Hani Fares, Journal of Cosmetic Science, vol. 63. No. 3, May 2012-Jun. 2012, pp. 213-221. cited by applicant ; Olga V. Dueva-Koganov, Michael Russell, Steve Miceri and Artyom Duev: “Evaluating Sunscreen Spray Polymers”, Mar. 5, 2012, p. 8PP. cited by applicant ; International Search Report of Application No. PCT/US11/23701. cited by applicant ; EP Examination issued in connection with EP Application No. 16770174.7 dated Nov. 21, 2018. cited by applicant ; EP Search and Examination issued in connection with EP Application No. 19176926.4 dated Dec. 3, 2019. cited by applicant ; Database GNPD MINTEL; anonymous: “2in1 Continuous Sunscreen Spray SPF 30”, XP55642879 retrieved from www.gnpd.com, database accession No. 2471893. cited by applicant ; Shin Etsu-Eric Bishop, “New silicone tools shine light on UV protection: Shin-Etsu silicones advances UV and sensory benefits for sunscreen formulators. ”, Sep. 2011, XP002795660, https://www.shinetsusilicones.com/news/Shin-Etsu%20Sunscreen%20Symposium%20Press%20Release%20-%20Final%20-%20092211.pdf. cited by applicant ; Search Report & Written Opinion issued in connection with PCT Application PCT/US2016/051505 dated Jan. 18, 2017. cited by applicant ; International Preliminary Report on Patentability issued in connection with PCT Application PCT/US2016/051505 dated Mar. 20, 2018. cited by applicant ; Mexican Office Action issued in connection with MX Application MX/a/2018/001844 dated Nov. 26, 2019. cited by applicant Primary Examiner: Phan, Doan T

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Sunscreen compositions with improved water resistance of UVA sunscreen active agents