Patent Picks—Cinnamon/​Lemongrass/​Lavender Cotton, Honeysuckle, Sunflower and More Preservatives

Aug 18, 2014 | Contact Author | By: Cosmetics & Toiletries editors
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Title: Patent Picks—Cinnamon/​Lemongrass/​Lavender Cotton, Honeysuckle, Sunflower and More Preservatives
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Moisturizing, color-protecting amino acid preservative
U.S. Patent 8802065
Publication date: Aug. 12, 2014
Assignee: Ajinomoto Co., Inc.

Disclosed in this patent are aqueous preservative solutions with a high amino acid content that are particularly effective against fungi and have excellent storage stability. When incorporated in a cosmetic, they impart a high moisturizing effect without causing a sticky feel. In addition, they prevent dyed hair from fading. Such solutions can be achieved by incorporating: pyrrolidone carboxylic acid and/or a salt thereof; a basic amino acid and/or a salt thereof; an acidic amino acid and/or a salt thereof; a neutral amino acid and/or a salt thereof; and lactic acid and/or a salt thereof at a specific ratio and pH.

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