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Sunscreen Formulas With Multilayer Lamella Structure

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.

Candelilla Wax Substitute for Lip Products

The substitute exhibits the same features as standard candelilla wax including a moderate melting point range, the consistency of a hard wax, it is hydrophobic. is can be a viscosity modifier and it is a durable film former.

Rhizobium Gum: A Novel Cosmetic Ingredient from Soil to the Skin

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.

Anionic Organosilicones: Complexing Agents for Quaternary Compounds

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.

Equilibration Reaction of Silicone Fluids

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.

New Hydrophobically Modified Polyelectrolyte Thickeners

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.

Thickening Toothpaste Formulations

The combined knowledge of rheology and chemistry of binders together with the art of proper formulation leads to the production of aesthetically pleasing dentifrice formulations.

Hydrolysis-Resistant Esters

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.

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Linking Sensory and Rheology Characteristics

The authors introduce a method to use rheological properties (such as dynamic viscosity and yield stress) to describe and predict skin sensory attributes (such as cohesiveness) of cosmetic products. This is a first step in learning to use emulsion structure to predict sensory attributes.

Advances in Polymers for Hair Coloring

This article surveys patents and technical literature, principally from the past 10 years, to report advances in polymers used for dyeing hair, color retention,and hair lightening. Associative thickeners (anionic, cationic, amphoteric, nonionic, HASE, HEUR), nonassociative thickeners, and silicones are discussed.

A Surfactant/Biopolymer Stabilizer for Emulsions

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.

Cationic-compatible Liquid Rheology Modifier

Noveon Inc., a subsidiary of specialty chemical company The Lubrizol Corporation, has announced a new cationic-compatible liquid rheology modifier.

Characterization of Multilamellar Vesicles for Cleansing Applications

In the present article, the authors characterize a multilamellar vesicle (MLV) system used in personal care and verify its structure via X-ray scattering, rheology and fluorescence microscopy. This enabled the study of MLV formation to investigate bulk rheology characteristics. The results are presented here as application-relevant properties.

Evonik Goldschmidt and Aqualon Collaborate on Personal Care Products

Aqualon, a division of Hercules Incorporated, and Evonik Goldschmidt GmbH have signed an agreement to bring utilitarian polymers to the forefront of the personal care industry.

Edible, Natural Ingredients for Personal Care

Sensient Cosmetic Technologies has launched a line of edible personal care ingredients.

Wood-derived Natural Colloidal Thickener

LCW Sensient has launched a natural colloidal thickener derived from wood that is an alternative for PMMA beads in natural products.

Polymers for Thickening and Aesthetics of Surfactant Systems

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.

Rheological Characterization of a Modified Taurate Acrylic Polymer for Skin Care

The rheology of a pre-neutralized, hydrophobically modified acrylic polymer was investigated by dynamic mechanical measurements using this methodological approach to establish its viscoelastic profile and stability in formulations. Properties of several polymer-containing emulsions were studied and their particle size distribution investigated by laser diffraction.