ACULYN 2051 is a cosmetic-specific rheology modifier of Dow Chemical’s ACULYN series, an inverse emulsion formula of sodium polyacrylate in polydimethylsiloxane, specially developed for skin care, sunscreen and other color cosmetic and personal care systems. Integrating thickening and emulsifying functions, no neutralization or heating is required, it is compatible with silicone and non-silicone systems
No neutralization and no heating - No pre-neutralization or heating treatment required, direct pouring and mixing, simplifying the formula process
Thickening and emulsifying in one - With dual functions of thickening and emulsifying, optimizing the stability of the formula system in one stop
Wide system compatibility - Suitable for silicone and non-silicone cosmetic formulas, no compatibility risk
Excellent skin feel improvement - Significantly reduce the greasiness and stickiness of the formula, endow the skin with a smooth and fresh touch
Compliant and easy to apply - Listed in the China Cosmetic Ingredient Catalog, easy to mix with other ingredients, suitable for various formulas
Skin care lotions/creams - Optimize thickening and emulsifying effects, improve skin feel smoothness, and reduce greasiness and stickiness
Sunscreen products - Suitable for various sunscreen formulas, stabilize the system and endow a fresh and non-sticky use feeling
Conditioners/hair masks - Improve the consistency of hair care products, endow hair with a smooth texture, and reduce tangling
Makeup base - Optimize the foundation and primer system, improve the smoothness and skin adhesion of application
Body care products - Suitable for body lotions and scrubs, improve consistency and enhance skin touch
| Brand | Dow Chemical (DOW) |
| Chemical Type | Sodium Polyacrylate/Polydimethylsiloxane Inverse (W/O) Emulsion |
| Active Ingredient Content | 29% |
| Cyclotetrasiloxane Content | <0.1% |
| Dynamic Viscosity | <4000 cP |
| Closed Cup Flash Point | >100℃ |
Q1: What types of coating systems is ACULYN 2051 best suited for?
A: ACULYN 2051 is primarily designed for waterborne architectural and industrial coatings, including acrylic, styrene-acrylic, and vinyl-acrylic emulsions. It performs effectively in both interior and exterior formulations where enhanced surface uniformity and reduced orange peel are desired.
Q2: How does ACULYN 2051 differ from silicone- or fluorosurfactant-based leveling agents?
A: Unlike silicone or fluorosurfactants, ACULYN 2051 is a polyacrylic associative thickener with dual functionality — it contributes to both rheology control and surface leveling. It offers good compatibility with common co-thickeners and avoids potential issues like recoatability challenges or substrate contamination sometimes associated with silicones.
Q3: Can ACULYN 2051 be added at any stage during formulation?
A: For optimal performance and dispersion stability, ACULYN 2051 is typically added during the let-down stage, after pigment grinding and alongside other water-soluble additives. Pre-dilution with water or compatible co-solvent is recommended before incorporation to ensure uniform distribution.
Q4: Does ACULYN 2051 affect film formation or drying behavior?
A: ACULYN 2051 is formulated to minimize interference with film formation kinetics. In typical usage levels, it does not significantly delay drying or impair coalescence — however, dosage should be optimized per system, as excessive amounts may influence open time or intercoat adhesion in multilayer applications.
Q5: Is ACULYN 2051 compatible with biocides and other common additives?
A: Yes, ACULYN 2051 demonstrates broad compatibility with commonly used isothiazolinone and benzisothiazole biocides, as well as standard defoamers, dispersants, and coalescing aids. Compatibility testing under specific formulation conditions is still recommended to confirm stability and performance.
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