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New in Function (page 145 of 157)
Dec 13, 2005 | 11:23 PM CST
By: Germain Puccetti, EMD Chemicals Inc.
This article discusses the main commercial insect repellent active chemicals and their efficacies in light of their tolerance by the human skin and body. Implications for finished product formulation are also discussed.
Dec 13, 2005 | 11:21 PM CST
By: John A. Imperante, Phoenix Chemical
Hydrolytic instability of esters in cosmetic products can be reduced, compared to that of standard straight chain esters, by using non-hydrolyzable esters synthesized from a diol reaction sequence. Two commercial dimer diol di-esters, given as examples, enable stable formulations at extremes of pH.
Dec 13, 2005 | 11:20 PM CST
By: T. Tadros, Consultant; E. Vandekerckhove, A. …
Nanoemulsions prepared and stabilized with hydrophobically modified inulin as the surfactant require much less surfactant than nanoemulsions prepared and stabilized using conventional surfactants such as alcohol ethoxylate because they have a reduced Ostwald ripening rate.
Dec 13, 2005 | 11:13 PM CST
By: Ken Klein, Cosmetech Laboratories
Whenever we are asked to formulate an emulsion, we think of and usually add a humectant. A humectant being defined as “a substance that promotes retention of moisture.” It is derived from Latin “hu-mecta-ns, hu-mecta-nt, present participle of hu-mecta-re, to moisten, from hu-mectus, moist, from hu-me-re, to be moist.” But these versatile materials deserve our respect. They have functions that go far beyond this simplistic definition!
Dec 13, 2005 | 11:10 PM CST
By: Pascale Rossi, Uniqema, Applied Research and T…
The solvent dimethyl isosorbide improves the delivery of hydrophilic actives, enabling it to enhance the color intensity and color uniformity of self-tanning formulations in tests reported here.
Dec 13, 2005 | 11:08 PM CST
By: Patrick Stolz and Barbara Obermayer, Pentapha…
Biotechnology methods are described for manufacturing of contaminant-free microalgae with potential skin care benefi ts, such as collagen synthesis and reduction of intracellular oxidative stress.
Dec 13, 2005 | 11:06 PM CST
By: Barbara E Brockway, PhD, Optima Chemicals Ltd.…
Sugar can be useful to formulate preservative-free products and to maintain the stability of formulations during freeze-thaw cycles. Formulators are beginning to recognize sugar as an active ingredient whose derivatives offer new uses in the personal care industry.
Dec 13, 2005 | 11:05 PM CST
By: Guido Gayko, PhD, Jürgen Warnecke, MD and Clau…
Coal tar is an effective antidandruff active, but it contains compounds that are proven carcinogens. In this article sodium shale oil sulfonate is shown in preliminary results for the first time to have antidandruff efficacy equivalent to that of coal tar with none of coal tar’s toxic potential.
Dec 13, 2005 | 11:03 PM CST
By: Nancy Clements, International Specialty Produc…
This article surveys a variety of tests used to evaluate polyimide-1, a new hair styling resin, by comparing its performance against that of PVP in gel and mousse formulations.
Dec 13, 2005 | 11:01 PM CST
By: Philippe Maillan, Anna Gripp, Fintan Sit, Rola…
The data presented shows polysilicone-15 demonstrates the ability to perform as a UV fi lter for hair protection and decreases the combing force necessary after irradiation to sample hair tresses in addition to enhancing the shine attribute of a formulated product.