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New in Formulating Aids (page 13 of 14)
Jan 02, 2006 | 12:38 PM CST
By: Anja Gestmann, PhD, and Judith Bucher, Nationa…
In the presented study, researchers suggest that acrylates/aminoacrylates/C10-30 alkyl PEG-20 itaconate copolymer serves to stabilize hydroxypropyl starch phosphate polymer in surfactant systems, and also enables hydroxypropyl starch phosphate polymer to further build viscosity.
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 | 02:50 PM CST
By: Joanna Newton, Stephanie Postiaux, Catharine S…
Novel silicone-based vesicles can encapsulate and subsequently release a variety of cosmetic actives--both oil-soluble and water-soluble. This article discusses the silicone polyethers used to develop these vesicles and the methods used to evaluate both the silicone polyethers and the vesicles. One study describes the use of these vesicles to encapsulate retinyl palmitate.
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 | 11:06 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.
Nov 01, 2005 | 04:14 PM CST
By: Albert Shansky, PhD, Albert Shansky Consultant…
Antichaotropic salts stabilize cysteine by lowering the water activity in an aqueous solution. This technique can be used to extend the shelf life of cysteine permanent wave solutions.
Sep 30, 2005 | 03:52 PM CDT
By: Giovanni Pantini, Solvay Solexis SpA
Clinical studies described here show that perfluoropolyether phosphate behaves as a very mild acidic agent, being effective in decreasing the pH without increasing the collateral effects of acidic compositions.
Aug 31, 2005 | 05:58 PM CDT
By: Matthew Giles, PhD, Octel Performance Chemical…
Chelating agents are rarely used in large volumes, but cumulatively they are a potential source of environmental damage. A recent but now well-proven alternative is trisodium ethylenediamine disuccinate (EDDS).
Aug 03, 2005 | 01:23 PM CDT
By: T. Tadros, Wokingham; S. Leonard and M.-C. Tae…
An emulsifier/biopolymer system using a mixture of nonionic surfactants and two biopolymers was developed. The surfactants provide effective steric stabilization against coalescence, whereas the biopolymers provide a high residual viscosity and yield value, thus providing stability against creaming. The mechanism of stabilization is discussed in terms of the synergy between the two biopolymers.