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New in Function (page 143 of 157)
Dec 23, 2005 | 04:16 PM CST
By: Allison Hunter and Melanie Trevino, New Phase …
At low formulating levels, film-forming polymers can increase water resistance and enhance SPF in sun care formulations, while also imparting improved aesthetics. In the case of C30-38 olefin/isopropyl maleate/ MA copolymer, a synergistic SPF effect can be achieved with PVP/eicosene copolymer.
Dec 23, 2005 | 04:11 PM CST
By: D. J. Miller, R. Morschhäuser, M. Löffler, R. …
Hydrophobically modified, water-soluble polyelectrolytes based on acrylamidopropane sulphonic acid (AMP-S) are new polymers whose use as rheology modifiers in cosmetic formulations and as emulsifiers in surfactant-free cream gels is described here.
Dec 23, 2005 | 03:57 PM CST
By: Tharwat Tadros, Wokingham; Lorna Kessell, Uniq…
Nanodispersions can be stabilized by various techniques to prevent flocculation, Ostwald ripening and coalescence in solubilized systems, liposomes, microemulsions, nanoemulsions and nanosuspensions. Examples are described.
Dec 23, 2005 | 03:29 PM CST
By: Yin Z. Hessefort, Wayne M. Carlson and Mingli …
UV protection hair care products in the current marketplace are mainly monomeric and adopted from skin care, therefore lacking substantivity and water solubility. This article reviews the detrimental effects of each range of UV light to hair and presents experimental results showing the sun protection performance of polyamide-2 for both hair morphology and artificial hair color fading.
Dec 23, 2005 | 03:27 PM CST
By: Uli Osterwalder and Bernd Herzog, Ciba Special…
Design considerations for broad-spectrum UV filters include photostability, solubility, efficacy, safety, registration, patent freedom, and PPD performance. These criteria are described and then applied in the case of bis-Ethylhexyloxyphenol methoxyphenyltriazine (BEMT), a new broadspectrum sunscreen active.
Dec 23, 2005 | 03:25 PM CST
By: Christine Saecker, DSM Nutritional Products
Most oral care products address plaque, caries, gingivitis, etc., with wellapproved active ingredients, however, consumers are increasingly looking for a more natural and complete approach to oral care. In this study, the catechin fraction of green tea – specifically epigallocatechin gallate (EGCG), exhibited several activities in oral care while offering a natural alternative.
Dec 23, 2005 | 03:23 PM CST
By: Johann W. Wiechers, PhD, Uniqema
Skin toning is defined and various mechanisms of action are discussed, including examples of molecules working via this mechanism. Specific attention is given to a possible new mechanism of action, namely that of reversed tanning.
Dec 23, 2005 | 03:18 PM CST
By: Larry Plonsker, Chemical Network Associates
Dendrimers are unique macromolecules that were invented in the late 1970s. They are three-dimensional, highly branched, star-like or tree-like polymers. They have three main components: a center core; a dendritic or branched interior; and exterior end groups. The uniqueness of this class of polymers is that they are well defined and are monodisperse, that is, the components of the polymer all have the same molecular weight. Most polymers are polydisperse in that there is a varying mixture of chain lengths in the final polymer.
Dec 23, 2005 | 03:16 PM CST
By: Peter Landa, Fiona Lam, Irina Morosov, Rita Ro…
In a series of evaluations comparing two skin moisturizers, hydroxyethyl urea was found to deliver moisturization efficacy comparable to glycerin, while offering some advantages in terms of sensory perception in skin care products.
Dec 23, 2005 | 03:09 PM CST
By: Y. Katsuta, T. Lida and S. Inomata, Life Scien…
In this study of pore size and sebum composition, the authors report that topical application of polyoxyethylene/polyoxypropylene dimethyl ether improves skin texture and reduces parakeratosis in facial skin, making large pores less visible.