Emulsifier SG-100 is mainly used in four major industries: cosmetics and personal care, textile industry, plastics industry, and pesticide formulations, as an efficient nonionic O/W emulsifier, softener, antistatic agent, and internal lubricant.
Detailed Description
Emulsifier SG-100 (PEG-100 Stearate) is a nonionic surfactant produced by Guoli Chemical, appearing as a white to slightly yellow waxy solid. Due to its molecular structure containing both hydrophilic polyoxyethylene long chains and lipophilic stearic acid groups, with a high HLB value, it exhibits excellent emulsifying and wetting capabilities, and is resistant to acids, alkalis, and hard water. Therefore, it has wide and irreplaceable applications in multiple industrial fields.
In formulations, SG-100 primarily acts as an O/W (oil-in-water) emulsifier, stably dispersing oily components in the aqueous phase to form a uniform and fine emulsion system. At the same time, its solubilizing function can effectively enhance the solubility and bioavailability of lipophilic active ingredients in water-based systems, which is especially critical for cosmetics and pesticide formulations.
Specific Applications and Processes in Various Industries
I. Cosmetics and Personal Care Industry
SG-100 is widely used in the formulation of creams, lotions, sunscreens, facial cleansers, etc. In the emulsification process, SG-100 is typically heated together with the oil phase components to 70–80°C to melt, then mixed and homogenized with the water phase to form a stable O/W emulsion. Its advantages include:
- Imparts a stable, fine texture and silky skin feel to the product
- Enhances the dispersion and penetration of active ingredients (e.g., Vitamin E, sunscreens)
- Improves the heat and cold stability of the formulation
II. Textile Industry
In textile processing, SG-100 is mainly used as a softening finishing agent and antistatic agent. Its application processes include:
- Padding process: SG-100 is formulated into a working solution; the fabric is padded and dried to obtain a soft and smooth hand feel
- Synthetic fiber oil agent: Used as a component of spinning oil to reduce friction between fibers and metals, while eliminating static buildup during processing
- Finishing process: Imparts durable antistatic properties to the finished fabric, enhancing wearing comfort
III. Plastics Industry
SG-100 plays a dual role as an internal lubricant and antistatic agent in plastics processing:
- Internal lubrication: Improves the fluidity of the resin melt, reducing processing torque and energy consumption, and minimizing equipment wear
- Mold release: Reduces friction between the product and the mold, improving demolding efficiency and surface finish
- Antistatic: Migrates to the product surface to form a conductive layer, preventing dust adsorption, suitable for electronic packaging materials, appliance housings, etc.
IV. Pesticide Formulations
SG-100 is used as an emulsifier in pesticide formulations such as emulsifiable concentrates (EC), emulsion in water (EW), and microemulsions (ME):
- Highly disperses oil-soluble active ingredients in water-based systems to form stable emulsions
- Ensures uniform wetting and spreading of the spray liquid on crop leaves during application
- Improves pesticide utilization and control efficacy
Technical Parameters
| Parameter | Specification |
|---|
| Chemical Name | Polyoxyethylene (100) Stearate (PEG-100 Stearate) |
| CAS No. | 9004-99-3 |
| Ionic Type | Nonionic |
| Appearance | White to slightly yellow waxy solid |
| HLB Value | Approximately 18–19 (theoretical, high HLB O/W emulsifier) |
| Solubility | Soluble in hot water, dispersible in warm water |
| Hard Water Resistance | Excellent |
| Acid/Alkali Resistance | Good |
Application Recommendations
- Recommended dosage in cosmetic formulations: 0.5%–5% (by weight of total formula), adjust according to oil phase content and desired consistency
- Textile softening finishing: Working solution concentration generally 5–20 g/L, with drying temperature 100–130°C
- Plastics processing: Recommended addition amount is 0.1%–1.0% of resin weight, can be added during mixing stage
- Pesticide formulations: Total emulsifier dosage is generally 5%–15% of the total formulation weight, can be compounded with other surfactants for optimal emulsification effect
Precautions
- This product is not a hazardous chemical, no GHS hazard classification, no significant harm to humans or the environment under normal use conditions
- It is recommended to maintain ventilation during operation; for prolonged contact, wear nitrile or neoprene gloves
- Storage temperature is recommended at 5°C to 40°C, avoid direct sunlight and keep away from strong oxidizing agents
- The product is a waxy solid; it can be appropriately heated to melt before use for easier feeding and dispersion
- When compounding with anionic surfactants, compatibility should be noted; small-scale testing is recommended first
