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KMID : 0604520100360040259
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Journal of the Society of Cosmetic Scientists of Korea
2010 Volume.36 No. 4 p.259 ~ p.263
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A Study on the Interaction with Preservatives and UV-Filters, Packaging Materials for Sunscreen Preservation
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Park Tae-Hoon
Kwack Il-Young
Jeon Ki-Boong
Kim Hyun-Hee
Kim Han-Kon
Shin Kye-Ho
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Abstract
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We measured and compared the partition coefficients and absorption levels of preservative phenoxyethanol (PE), antimicrobial ethylhexylglycerin (EG) and UV-filters widely used in cosmetic products and more specifically evaluated the relative absorption level of PE depending on various packaging materials. The resulting partition coefficients of 11 UV filters in relation to PE and EG displayed EG with a relatively higher partition coefficients. The partition coefficients of Tinsorb M and Solaveil CT434 were also high. Among the UV-filter ingredients with EG absorption levels exceeding 40 % were Gransil PSQ, UV Titan M 160 and Micro MT 100 TV, whereas Gransil PSQ and Scadder showed PE absorption levels above 40 %. In addition, we confirmed that PE had displayed an absorption level of 7 ~ 8 % as a result of 1 month-long exposure to packaging material polyoxymethylene. This extensive research illustrates the possibility of producing the most potent preservative contents based on studying the relative compatibility between UV-filters and preservatives and selecting the adequate preservatives to be used. Furthermore, preservative level can also decline with passage of time depending on the type of packaging material used.
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KEYWORD
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UV filter, phenoxyethanol, ethylhexylglycerin, partition coefficient, absorption
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