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[Investigation of ambiphilic creams. II. Structural stability]
1Szegedi Tudományegyetem, Gyógyszerésztudományi Kar Gyógyszertechnológiai Intézet, Szeged.
Acta Pharmaceutica Hungarica
|August 25, 2000
Abstract:
Ambiphile creams containing white petrolatum, cetylstearyl-alcohol, Emulgator BTO and distilled water were investigated. The elements of the study of structure-stability were as follows: evaporation of water-phase, mechanical stability of structure and its heatstability. A multiplicative function was found between the loss of mass of creams and the evaporation time. The viscosity vs. temperature function is a two-steps process, it can be divided to a section before melting and an other section after it. Decreasing viscosity under shearing time can be characterized by a logarithmic equation.