TEGIN® M Pellets MB by Evonik is a consistency enhancer and co-emulsifier. This vegetable based ingredient is finely dispersed, stable O/W emulsion. It is obtained in combination with hydrophilic anionic, cationic, amphoteric or nonionic emulsifiers. TEGIN® M Pellets MB is used in formulating creams and lotions. INCI (PCPC name) : Glyceryl Stearate Usage concentration of 1.0 – 5.0% Intended use : Stabilizer PROPERTIES: ▪ TEGIN® M Pellets MB or TEGIN® 4100 Pellets MB is used as a stabilizer in creams and lotions of the oil-in-water-type, because it has viscosity-increasing and emulsion-stabilizing properties. ▪ In combination with hydrophilic anionic, cationic, amphoteric or non-ionic emulsifiers, finely dispersed, stable O/W emulsions are obtained. ▪ In contrast to self-emulsifying glycerol-monodi- stearates (e. g. TEGIN®) TEGIN® M Pellets MB or TEGIN® 4100 Pellets MB possess only weak emulsifying properties PREPRATION: TEGIN® M Pellets MB or TEGIN® 4100 Pellets MB is added to the oil phase. Combination of TEGIN® M Pellets MB or TEGIN® 4100 Pellets MB with fatty alcohols like e. g. TEGO® Alkanol 1618 MB or cetyl alcohol as well as stearyl alochol are used for the formulation of O/W emulsions. The ratio 2 parts TEGIN® M Pellets MB or TEGIN® 4100 Pellets MB and 1part TEGO® Alkanol 1618 MB or cetyl alcohol as well as stearyl alcohol is tested successfully. We therefore recommend for the preparation of creams to heat oil phase and water phase separately to approx. 65 °C; for lotions oil phase and water phase are heated separately to 80 °C. Furthermore we recommend to add the hot oil phase to the hot water phase while stirring. The coarsely dispersed pre-emulsion is then homogenized. If it has to be charged with the oil phase due to production-related conditions, the water phase must be added to the oil phase without stirring (in order to avoid the formation of a water-in-oil emulsion) and homogenisation has to be started afterwards. During cooling, a constant horizontal and vertical movement of the emulsion has to be ensured. The viscosity of the liquid emulsion increases to a creamy consistency, as the hydrated consistency promoters solidify. Thickeners such as polyacrylates are added as an oil-dispersion (e. g. in mineral oil, decyl oleate, ethylhexyl stearate; not in triglycerides) is added at 60 °C. Then the emulsion is homogenized again.
