DERMACRYL 79, Acrylates/Octylacrylamide Copolymer-CAS 129702-02-9
Product Name: DERMACRYL 79
INCI Name: ACRYLATES/OCTYLACRYLAMIDE COPOLYMER
CAS Number: 129702-02-9
Product Grade: Cosmetic grade
Appearance: White to off-white fine powder
Odor: Slight characteristic odor or odorless
Molecular Weight: High molecular weight carboxylated acrylic copolyme
Shelf Life: 24 months
Storage: Store in cool, dry, well-ventilated area, keep sealed, avoid moisture
DERMACRYL 79, Acrylates/Octylacrylamide Copolymer, waterproof polymer, film forming agent, water resistant sunscreen, alcohol soluble polymer, Nouryon polymer, long lasting makeup, SPF booster, hydrophobic acrylic copolymer
DERMACRYL 79, Acrylates/Octylacrylamide Copolymer-CAS 129702-02-9
DERMACRYL 79 is a premium, high molecular weight hydrophobic carboxylated acrylic copolymer manufactured by Nouryon, renowned for its exceptional water resistance and film-forming properties. This versatile polymer, with the INCI name Acrylates/Octylacrylamide Copolymer, forms flexible, breathable, and highly water-resistant films on skin and hair, making it an ideal choice for waterproof and long-wear formulations.
Unlike many water-soluble film formers, DERMACRYL 79 is inherently hydrophobic, providing excellent resistance to sweat, humidity, and water immersion. It is readily soluble in alcohols, making it easy to incorporate into sprayable and alcohol-based formulations. The polymer's unique structure also helps retain active ingredients at the application site by imparting resistance to abrasion and rub-off, enhancing the efficacy of sunscreens, skincare actives, and color cosmetics. With its non-tacky, comfortable skin feel and broad formulation compatibility, DERMACRYL 79 is a trusted choice for formulators worldwide seeking high-performance, long-lasting products.
Key Benefits
• Superior water resistance: Excellent sweat, humidity, and water immersion resistance for waterproof formulations
• High quality film formation: Creates flexible, breathable, non-tacky films with excellent adhesion
• Alcohol soluble: Readily dissolves in ethanol and isopropanol, easy to formulate with
• Long-lasting wear: Extends wear time of makeup and sunscreens, resists rub-off and transfer
• SPF boosting effect: Enhances SPF values by improving UV filter retention and film uniformity
• Abrasion resistance: Helps active ingredients stay on skin longer, improves product efficacy
• Non-tacky skin feel: Forms comfortable, lightweight films without sticky or greasy residue
• Broad formulation compatibility: Works with most cosmetic ingredients and emulsion systems
• Humidity resistant: Maintains performance in high humidity conditions, ideal for hair styling
• Mild and safe: Non-irritating, non-comedogenic, suitable for all skin types including sensitive skin
Applications
• Waterproof sunscreens and sun sprays: Recommended usage 2%–8%, water resistance and SPF boost
• Long-wear foundations and BB creams: Recommended usage 1%–5%, transfer resistance and longevity
• Waterproof mascara and eye makeup: Recommended usage 2%–8%, water resistance and long wear
• Long-lasting lipsticks and lip glosses: Recommended usage 1%–6%, transfer resistance and wear time
• Hair styling sprays and mousses: Recommended usage 1%–5%, humidity resistance and hold
• Setting sprays and makeup fixers: Recommended usage 1%–4%, extend makeup wear time
• Moisturizing creams and lotions: Recommended usage 0.5%–3%, film forming and skin protection
• Antiperspirants and deodorants: Recommended usage 1%–4%, long-lasting protection
• Nail polish and nail care products: Recommended usage 2%–6%, film forming and durability
• Tinted moisturizers and CC creams: Recommended usage 1%–4%, even coverage and longevity
Certificate Of Analysis (COA)
Test Item | Standard Requirement | Test Result | Test Method |
Appearance | White to off-white fine powder | Complies | Visual inspection |
Identification (IR) | Conforms to reference spectrum | Complies | FT-IR |
Loss on Drying | ≤3.0% | 1.8% | Gravimetric method |
Ash Content | ≤0.5% | 0.2% | Gravimetric method |
pH Value (1% dispersion) | 3.0–5.0 | 4.2 | pH meter |
Viscosity (10% in ethanol) | 500–3,000 mPa·s | 1,800 mPa·s | Brookfield viscometer |
Residual Monomers | ≤1000 ppm | <500 ppm | HPLC |
Color (APHA, 10% ethanol solution) | ≤100 | <50 | Colorimetry |
Particle Size (95% through) | ≤200 mesh | Complies | Sieve analysis |
Heavy Metals (as Pb) | ≤10 ppm | <5 ppm | ICP-MS |
Arsenic (As) | ≤2 ppm | <0.5 ppm | ICP-MS |
Lead (Pb) | ≤5 ppm | <1 ppm | ICP-MS |
Total Aerobic Count | ≤100 CFU/g | <10 CFU/g | GB 4789.2 |
Mold & Yeast | ≤10 CFU/g | <10 CFU/g | GB 4789.15 |
E. coli | Absent | Absent | GB 4789.3 |
Conclusion | Complies with cosmetic grade specifications | ||
Frequently Asked Questions (FAQ)
Q1: What is the difference between DERMACRYL 79 and other acrylic film formers like Acrylates Copolymer?
A: DERMACRYL 79 contains octylacrylamide groups that give it significantly higher hydrophobicity and water resistance compared to standard Acrylates Copolymer. It forms tougher, more water-resistant films that withstand sweat and immersion better. DERMACRYL 79 is also more alcohol-soluble, making it ideal for sprayable waterproof sunscreens and setting sprays where standard acrylates may not dissolve well.
Q2: How do I dissolve and incorporate DERMACRYL 79 into formulations?
A: DERMACRYL 79 is best dissolved in alcohols (ethanol, isopropanol) first, then added to the formulation. For aqueous systems, disperse the powder in water first, then neutralize with a base like TEA, AMP, or sodium hydroxide to form a clear film. Typical neutralization pH is 6.5–7.5. It can also be added to the oil phase or dissolved in glycols like propylene glycol with heating. Always sprinkle slowly into well-agitated solvent to prevent clumping.
Q3: Can DERMACRYL 79 really make sunscreens waterproof? How much SPF boost can I expect?
A: Yes, DERMACRYL 79 is specifically designed for water-resistant formulations. It forms a hydrophobic film that helps UV filters stay on the skin during water exposure, meeting FDA and EU water resistance standards. The SPF boost varies by formulation but typically ranges from 10%–30% improvement due to better film uniformity and reduced UV filter migration. It is widely used in sport and waterproof sunscreens globally.
Q4: Will DERMACRYL 79 cause a tacky or heavy feeling on skin? Is it breathable?
A: No, DERMACRYL 79 forms lightweight, non-tacky films that feel comfortable on skin. Unlike some heavy film formers, its films are breathable and allow skin to function normally. At typical usage levels (1%–5%), most users cannot feel the film at all. It does not clog pores or cause breakouts, making it suitable for acne-prone and oily skin types as well.
Q5: What compliance documents and certifications are available?
A: Batch COA, SDS/GHS safety data sheet, Certificate of Origin, China Cosmetic Ingredient Inventory confirmation (No. 01461), technical data sheet, heavy metal and microbiological test reports, residual monomer test reports, and HALAL certification from Nouryon. REACH registration and FDA documentation available upon request. Cosmetic grade meets all global cosmetic safety standards.
Q6: What is the shelf life and are there any special storage requirements?
A: Shelf life is 24 months in original sealed packaging. Store in a cool, dry, well-ventilated area away from direct sunlight and moisture. Keep containers tightly sealed when not in use to prevent moisture absorption and caking. The powder is hygroscopic so humidity control is important. No special handling required beyond standard chemical precautions. Avoid inhalation of fine powder dust.
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