Formulas, Ingredients and Production of Cosmetics by Hiroshi Iwata & Kunio Shimada

Author:Hiroshi Iwata & Kunio Shimada
Language: eng
Format: epub
Publisher: Springer Japan, Tokyo

4.3 Sensory Properties of Alkyl Groups

It is very important to know the feels given by each ingredient of cosmetics. Especially the alkyl groups of oils and surfactants affect the feel of use directly.

The alkyl groups determine the melting point (the larger the molecular weight, the higher the melting point) and polarity (by the number of oxygen atoms and chemical structures, such as double bonds, side chains, and functional groups). The functional groups determine the compatibility and interaction with other ingredients and affect the viscosity, consistency, appearance, hardness, spread, and the feel of use. The sense and texture felt by users highly depends on the structures of alkyl groups. The properties of the alkyl groups are the key factor in designing the feel of cosmetics, and we should understand of the chemical and physical properties and know the feel given by each ingredient.

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