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POLYACRYLATE-55.

Valuable / FILM FORMING

POLYACRYLATE-55 is a high molecular weight synthetic polymer that serves as a versatile rheology modifier in skincare. It significantly enhances product texture, consistency, and stability while forming a hydrating barrier on the skin's surface.

Summary

Absorbent Binding Emollient Emulsion Stabilizing Film Forming Hair Fixing Skin Conditioning Viscosity Controlling Thickening Agent Texture Enhancer

Science

Mechanism of Action

As a super-absorbent polymer, POLYACRYLATE-55 (often discussed in conjunction with Sodium Polyacrylate due to shared properties) possesses the remarkable ability to absorb 100 to 1000 times its mass in water. Its substantial molecular size ensures it remains on the stratum corneum, preventing deeper skin penetration. On the surface, it functions as a thickening agent, texture enhancer, and emulsion stabilizer, increasing viscosity and improving product feel. Furthermore, it attracts and retains moisture from the environment, creating a hydrating, gel-like barrier. This protective film reduces transepidermal water loss (TEWL), supports skin hydration, maintains barrier integrity, and can facilitate the sustained delivery of active ingredients.

Research

Clinical Evidence

Medium confidence
Effective range 0.1–3%
Optimal

Formulation-dependent, typically between 0.1% and 3.0% for various applications.

Key findings

  1. 01 Utilized in lotions at concentrations of 0.1% to 2% to stabilize formulations and ensure uniform consistency, effectively preventing ingredient separation.
  2. 02 Incorporated into gel-based products, including facial and hair gels, at 0.5% to 3% to achieve desired viscosity and maintain gel structure.
  3. 03 Included in sunscreens within a concentration range of 0.1% to 1%.

Transparency

Dusting Analysis

Not commonly dusted

The provided research data does not indicate that POLYACRYLATE-55 is commonly associated with 'dusting' in cosmetic formulations.

The Formula

Formulation

Solubility
Water
Optimal pH 6 – 8
0 7 14

Stability

A 1% solution typically exhibits a pH between 6.0 and 8.0. Optimal dispersion and full chain elongation are achieved in soft water with low salinity. Acrylic polymers demonstrate stability against outdoor weathering and resistance to mild acids and bases. For maintaining efficacy and preventing clumping, POLYACRYLATE-55 must be stored in an airtight container to avoid moisture exposure.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
3%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that POLYACRYLATE-55, as Sodium Polyacrylate, is safe for use in cosmetics at typical concentrations ranging from 0.1% to 3%, adhering to stringent regulatory standards like those set by the FDA. While generally considered non-irritating at appropriate concentrations, individuals with extremely sensitive skin or pre-existing conditions may experience minor irritation, such as redness or itching, potentially attributable to trace residual acrylic acid (which should ideally be below 300 PPM). The Environmental Working Group (EWG) rates it with low concerns regarding cancer, allergies, immunotoxicity, and developmental/reproductive toxicity.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

POLYACRYLATE-55 is a valuable, multi-functional polymer that significantly enhances product stability, texture, and delivers surface-level hydration and barrier protection across a wide range of skincare formulations.

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