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Rheology/Viscosity Modifier
New in Rheology/Viscosity Modifier (page 7 of 9)
May 01, 2006 | 11:02 AM CDT
Correlating the Structure and Rheology of Lamellar Liquid Crystalline Phases in Emulsions
By: T. Tadros, Consultant; S. Leonard, M.-C. Taelm…
This paper describes the correlation between the structure of liquid crystalline phases in emulsions and their rheological characteristics. An oleosome/lipophilic liquid crystalline-forming system and hydrosome/hydrophilic liquid crystalline-forming system were investigated. At the same high shear rate viscosity, the oleosome-system showed less thixotropy and rapid recovery when compared with the hydrosome-system.
Apr 26, 2006 | 11:09 AM CDT
Sunscreen Formulas With Multilayer Lamella Structure
By: Timothy Gao, PhD, Jung-Mei Tien and Yoon-Hee C…
The multilayer lamellar structure in sunscreens containing phosphate emulsifiers plays key roles in the emulsion rheology and in enhancing deposition of sunscreen oil on skin surface, thereby improving the SPF water wash resistance.
Apr 21, 2006 | 10:18 AM CDT
Fluid Gels Based On Natural Polymers For Cosmetic Applications
By: Peter A. Williams and Martina Hickey, Centre f…
Varying the concentration of two polymers – xanthan gum and konjac mannan – mixed in solution and subjected to shear while cooling yields fluid gels whose viscosity can vary from a pourable solution to a spreadable gel.
Feb 28, 2006 | 05:55 PM CST
Amphoteric Anionic Interactions
By: Anthony J. O'Lenick, Jr., Siltech LLC and Laur…
A study of interactions between anionic surfactants and amphoteric surfactants in solution demonstrates that betaines and anionic surfactants interact to have positive effects on viscosity, foam and the salt curve.
Jan 05, 2006 | 10:39 AM CST
Colonial Launches HMW Betaine
Colonial Chemical highlights a new high molecular weight (HMW) betaine that is naturally derived from linoleic acid.
Jan 04, 2006 | 12:42 PM CST
Equilibration Reaction of Silicone Fluids
By: Anthony J. O'Lenick, Jr., Siltech LLC; Kirk N.…
Silicone compounds resemble organic compounds in their ability to make derivatives, but they are fundamentally different because they are equilibrium products. The nature of the equilibrium and the composition of the equilibrium mixture are the key factors. This is important because cyclic compounds are undesirable in personal care products.
Jan 02, 2006 | 12:38 PM CST
Polymers for Thickening and Aesthetics of Surfactant Systems
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 | 05:22 PM CST
Rhizobium Gum: A Novel Cosmetic Ingredient from Soil to the Skin
By: Anthony Bresin, Ghislain Sanhaji and Romain Re…
A new polysaccharide, produced by fermentation of a Rhizobium sp. strain, is introduced as a typical example of how technology can create new properties and new applications from a “basic” natural ingredient.
Dec 23, 2005 | 05:20 PM CST
Anionic Organosilicones: Complexing Agents for Quaternary Compounds
By: Brian Vondruska, Laurie Marshall, Pamela McCal…
A new formulating technique allows for the preparation of clear gels containing both anionic rheology control polymers and cationic conditioning agents, ingredients which were traditionally thought to be incompatible with one another.
Dec 23, 2005 | 04:11 PM CST
New Hydrophobically Modified Polyelectrolyte Thickeners
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.