Hexapolyricinoleate Emulsifier

Hexapolyricinoleate – Multifunctional Lipophilic Emulsifier for Cosmetics, Pharmaceuticals, and Specialty Polymers

Chemical Structure and Synthesis
Hexapolyricinoleate is a complex ester compound produced by the complete esterification of a polyhydroxyl substrate – typically myo‑inositol (a six‑hydroxy cyclic sugar alcohol) – with six molecules of ricinoleic acid (or polyricinoleic acid). The synthesis can be represented as:
Myo‑Inositol + 6 Ricinoleic Acid → Hexapolyricinoleate + 6 H₂O
This approach ensures the full esterification of all six hydroxyl groups, resulting in a high molecular weight compound with significantly enhanced lipophilic character and a unique balance between hydrophilic and lipophilic fragments.

Physicochemical Properties

• Emulsifying activity: Six ricinoleate chains effectively reduce interfacial tension, promoting the formation and long‑term stability of water‑in‑oil (W/O) emulsions.

• High lipophilicity: The abundance of long hydrocarbon chains provides excellent solubility in oils and non‑polar media, making it ideal for oil‑rich formulations.

• Film‑forming properties: Forms protective films that enhance moisture resistance and improve the tactile feel of end products.

• Thermal stability: The polyester structure maintains its integrity across a broad temperature range, ensuring reliable performance under various processing and storage conditions.

• Non‑ionic: Compatible with a wide range of ingredients and pH levels.

• Biodegradable and derived from renewable plant‑based castor oil sources.

Applications

• Cosmetics and personal care: Used as a primary or co‑emulsifier in W/O creams, lotions, serums, sunscreens, makeup removers, and lip products. Provides stable, elegant textures with good spreadability, enhanced moisturization, and a smooth, non‑greasy feel. Its film‑forming and adhesive properties help pigments and active ingredients adhere to skin and hair for long‑lasting performance.

• Pharmaceuticals: Employed as an emulsifier, solubilizer, and penetration enhancer in topical ointments, creams, and suppositories for uniform delivery of active pharmaceutical ingredients.

• Specialty polymers and industrial applications: Used in the synthesis of high‑performance polyester resins, lubricants, plasticizers, and specialty coatings where high lipophilicity, thermal stability, and film‑forming properties are essential.

Key Benefits

• Effective W/O emulsification with excellent stability and uniformity.

• Mild and non‑irritating – suitable for sensitive skin.

• Provides emollient, film‑forming, and adhesive properties.

• Thermal and oxidative stability – reliable over a wide temperature range.

• Biocompatible, biodegradable, and derived from renewable sources.

• Compatible with a wide range of cosmetic, pharmaceutical, and industrial ingredients.

• Acts as a co‑emulsifier, thickener, and stabilizer in complex formulations.

Recommended Use
Typical usage levels range from 1–5% of the formulation, depending on the desired emulsion stability, viscosity, and texture. For optimal performance, dissolve in the oil phase at elevated temperatures (60–70°C) before emulsification. Can be combined with co‑emulsifiers and thickeners for tailored rheology.

Safety and Handling

• Generally recognized as safe for use in cosmetics and personal care at recommended concentrations.

• Low irritation potential; well‑tolerated by skin.

• Avoid contact with strong oxidizers and acids.

• Store in a cool, dry place, away from direct sunlight.

• Use appropriate personal protective equipment (gloves, safety goggles) when handling.

Quality Assurance
Each batch is tested for acid value, saponification value, and emulsification performance to ensure consistent quality.