Emulsifier SG-100 (PEG-100 Stearate) is a white to pale yellow waxy solid at room temperature (melting point 50-55°C), so it usually needs to be pre-melted or heated to dissolve before use. Due to its high HLB value of 18.5-19, it has strong hydrophilicity and is easily soluble in water, ethanol, and acetone, making it particularly suitable for preparing oil-in-water (O/W) emulsion systems. In the formulation, it can be used alone as the primary emulsifier or combined with low-HLB emulsifiers to achieve more stable emulsification effects.
Actual operation methods vary by industry: In cosmetics manufacturing, SG-100 is typically heated together with the oil phase components to 55-70°C to fully melt, stirred evenly, and then mixed with the water phase for homogenized emulsification. In the textile industry, it is generally first dissolved in hot water at 60-70°C to prepare a solution of a certain concentration, which is then used for padding or impregnation treatment of fibers or fabrics. In pesticide formulations, it is often mixed with the pesticide active ingredient and solvent, then slowly added to water under shear stirring to form a stable emulsion. The database does not provide specific dosage ratios; it is recommended to determine the optimal addition amount through small-scale experiments.
This product is resistant to acids, alkalis, and hard water, with good stability in the pH range of 3-8. Its low foam characteristics make it especially suitable for industrial operations requiring low foam or foam control. It should be noted that under strong acid or strong alkali conditions, the ester bonds in the molecule may hydrolyze, so prolonged use in high-intensity acid or alkali environments should be avoided.
| Parameter | Value |
|---|---|
| Appearance | White to pale yellow waxy solid |
| Ionic Type | Nonionic |
| HLB Value | 18.5-19 |
| Melting Point | 50-55°C |
| Active Content | ≥99% |
| pH of 1% Aqueous Solution | 5.0-7.0 |
| Solubility | Easily soluble in water, ethanol, acetone |
| Foam Characteristics | Low foam |
| Acid and Alkali Resistance Range | Stable at pH 3-8 |
| Cloud Point | >100°C |
Cosmetics and Personal Care Products: Used as an O/W emulsifier and solubilizer in creams, lotions, and sunscreen products. It is recommended to add SG-100 to the oil phase, heat to 55-70°C to melt, then mix with the water phase, and homogenize to form a fine and stable emulsion texture, while also improving the dispersion and skin feel of active ingredients.
Textile Industry: Used as a softener and antistatic agent. Dissolve SG-100 in hot water at 60-70°C to prepare a working solution, treat fabrics through padding or impregnation processes to impart a soft and smooth hand feel and reduce electrostatic buildup. After treatment, the surface lubricity of the fibers improves, reducing friction in subsequent finishing processes.
Plastics Industry: Added to plastic formulations as an internal lubricant and antistatic agent. During the melt processing stage, it improves melt flowability, reduces friction with processing equipment, and prevents dust attraction on the finished product surface. The specific addition amount needs to be optimized through experiments based on the resin type and processing conditions.
Pesticide Formulations: Used in emulsifiable concentrate (EC) or emulsion in water (EW) formulations to highly disperse oil-soluble active ingredients into a water-based system to form a stable emulsion, ensuring uniform coverage during spray application. In operation, pre-mix SG-100 with the pesticide active ingredient and solvent, then gradually add the water phase under high-speed shear.