Recent in Rheology/Viscosity Modifier (page 6 of 6)

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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.

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.

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.

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.

Cationic Emulsifiers: A Most Underutilized Category

Cosmetic chemists have at their disposal a seemingly endless supply of emulsifiers from which to choose. By far, the most popular category of emulsifiers is “soap"–the reaction product between a fatty acid typically stearic acid) and an alkali earth metal (typically sodium hydroxide, occasionally potassium hydroxide).

Selecting the Right Emollient Ester

Formulating tips and representative formulas are presented to help the formulating chemist select the appropriate emollient esters for use as pigment wetting agents in various types of makeup systems, such as foundations and lipsticks.

Chitosan in Cosmetics: Technical Aspects when Formulating

A high-grade chitosan made from shrimp shells has viscosity-building properties that support its use in cosmetic emulsions and gels.

New Cellulose Derivatives in Personal Care Formulations

Hydrophobic modified cellulose ethers can be used to thicken formulations containing high concentrations of anionic surfactants by adding nonionic surfactants to the system. Implications are shown for liquid soaps and hair shampoos.

Synthetic Copolymers as Rheology Modifiers for Personal Care Formulations

This article describes the mechanisms of acrylate and polyurethane copolymers used as rheology modifiers. It gives examples of their use, and suggests new uses in emulsification and in suspending particles in clear formulations.

Bring Food to the Soul of your O/W Emulsion with a Dual Rheology Stabilizing System

Cosmetic emulsions can be stabilized via bulk rheology and interfacial rheology by using a unique synergistic blend of two polysaccharides in a technology derived from the food industry.