PEG-30 Dipolyhydroxystearate‌

I. Basic Information

Chemical Name: PEG-30 Dipolyhydroxystearate
INCI Name: PEG-30 Dipolyhydroxystearate
CAS Number: 827596-80-5
EINECS/ELINCS Number: 000-000-0
Molecular Formula: C₆₀H₁₁₆O₁₇
Molecular Weight: 1121.57 g/mol
Product Category: Non-ionic surfactant, polymeric emulsifier
Appearance: Pale yellow to light brown waxy solid or viscous paste (25°C)
Odor: Faint, characteristic fatty odor
Solubility: Dispersible in warm water; soluble in ethanol, isopropanol, and most vegetable/mineral oils
HLB Value: 10–12 (oil-in-water emulsion type)
pH Value: 5.0–7.0 (1% aqueous dispersion at 25°C)
Storage Stability: 24 months when stored in original sealed containers at 5–30°C, away from direct sunlight and moisture

II. Physical & Chemical Properties

Key Functional Characteristics:

1. Emulsifying Stability: Forms a robust, irreversible interfacial film between oil and water phases, preventing coalescence and maintaining emulsion integrity for 12+ months under accelerated stability testing (45°C for 3 months).

2. Texture Modification: Imparts a smooth, non-greasy feel to cosmetic formulations, reducing tackiness and improving spreadability on skin and hair.

3. Solubilization Capacity: Enhances solubility of lipophilic actives (e.g., vitamin E, essential oils) in aqueous systems, improving bioavailability and formulation clarity.

4. Compatibility: Compatible with anionic, cationic, and non-ionic surfactants, as well as most cosmetic raw materials including silicones, polymers, and natural extracts.

5. Mildness: Low skin irritation potential (tested via human repeat insult patch testing, HRIPT) and non-sensitizing, suitable for sensitive skin formulations.

III. Production Methods

1. Conventional Industrial Synthesis

• Raw Materials: Dimeric hydroxystearic acid (from castor oil hydrogenation and dimerization), polyethylene glycol 1500 (PEG-30), and p-toluenesulfonic acid catalyst.

• Process Flow:

1. Esterification: React dimeric hydroxystearic acid with PEG-30 in a stainless steel reactor at 160–180°C under nitrogen blanket, with continuous water removal via distillation.

2. Neutralization: Adjust pH to 5.0–7.0 using sodium hydroxide solution after reaction completion.

3. Purification: Filter to remove catalyst residues, then decolorize with activated carbon under vacuum.

4. Packaging: Cool to 50°C and fill into lined steel drums or plastic containers.

• Yield: ~92%

2. Green Manufacturing Process

• Key Improvements:

• Use of immobilized lipase catalyst (Novozym 435) instead of mineral acids, reducing corrosion and simplifying purification.

• Reaction temperature lowered to 100–120°C, cutting energy consumption by 35%.

• Closed-loop water recycling system, eliminating wastewater discharge.

• Solvent-free production, reducing volatile organic compound (VOC) emissions by 90%.

• Product Advantage: Lighter color (Gardner ≤2) and lower free PEG content (<3.0%) compared to conventional methods.

IV. Applications

1. Cosmetics & Personal Care (Primary Market)

• Skin Care: Day/night creams, moisturizers, anti-aging serums, sunscreens, and after-sun products (2.0–4.0% dosage).

• Makeup: Foundations, BB creams, concealers, and liquid blushes (1.5–3.0% dosage).

• Hair Care: Conditioners, hair masks, and leave-in treatments (1.0–2.5% dosage), improving combability and reducing frizz.

• Baby Care: Gentle lotions and diaper creams (1.0–2.0% dosage), due to high mildness.

2. Pharmaceutical Industry

• Topical Formulations: Ointments, creams, and gels for drug delivery (e.g., corticosteroids, antifungals), enhancing skin penetration and bioavailability.

• Oral Care: Toothpastes and mouthwashes, as a solubilizer for flavor oils and active ingredients (0.5–1.0% dosage).

3. Industrial Applications

• Lubricants: Emulsifier for water-based metalworking fluids, improving lubricity and corrosion resistance.

• Paints & Coatings: Dispersant for pigment slurries, enhancing color uniformity and storage stability.

• Agriculture: Adjuvant for pesticide formulations, improving spray coverage and plant absorption.

V. Application Cases

Case 1: Oil-in-Water Anti-Aging Cream (Cosmetics)

• Formulation:

• Phase A (Aqueous): Deionized water (65.0%), glycerin (5.0%), propylene glycol (3.0%), carbomer (0.2%).

• Phase B (Oil): PEG-30 Dipolyhydroxystearate (3.0%), shea butter (5.0%), jojoba oil (4.0%), vitamin E acetate (1.0%), squalane (2.0%).

• Phase C (Active): Hyaluronic acid (0.1%), matrixyl 3000 (0.05%), triethanolamine (0.25%).

• Phase D (Preservative): Phenoxyethanol (0.5%).

• Performance:

• Stable emulsion with no phase separation after 6 months at 45°C.

• Clinical testing showed 28% improvement in skin hydration after 4 weeks of daily use.

• Non-greasy texture with rapid absorption, preferred by 92% of panelists in consumer trials.

Case 2: Water-Based Metalworking Fluid (Industrial)

• Formulation:

• Deionized water (75.0%), PEG-30 Dipolyhydroxystearate (4.0%), triethanolamine oleate (3.0%), borax (2.0%), corrosion inhibitor (1.5%), biocide (0.5%).

• Performance:

• Reduced friction coefficient by 18% compared to conventional emulsifiers.

• Extended tool life by 25% in aluminum alloy machining tests.

• Passed 72-hour salt spray corrosion test (ASTM B117) on carbon steel substrates.

Case 3: Topical Antifungal Cream (Pharmaceuticals)

• Formulation:

• Clotrimazole (1.0%), PEG-30 Dipolyhydroxystearate (3.5%), cetyl alcohol (2.0%), stearyl alcohol (2.0%), white petrolatum (5.0%), deionized water (86.5%).

• Performance:

• 95% drug release within 30 minutes in in vitro diffusion tests (Franz cell).

• Clinical cure rate of 88% for tinea pedis after 4 weeks of treatment, compared to 76% with a standard cream formulation.

‌Shanghai Better Chemical Co., Ltd. was established in 2005‌, specializing in ‌fatty alcohols, fatty acids, glycerin, white oil, and petroleum jelly‌. These products serve a wide range of industries, including ‌personal care, flavor & fragrance, textiles, plastics, food, pharmaceuticals, stationery, construction, and coatings‌. With ‌21 years of professional experience‌, the company has earned consistent recognition across the industry and established partnerships with ‌over 4,000 clients‌. It maintains a skilled technical team, efficient warehouse operations, high-quality pre- and after-sales services, and lightning-fast logistics. We look forward to collaborating with you. For inquiries, please call: ‌021-5102 9963‌.