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POLYACRYLATE-45.

Valuable CAS 1897432-34-6 / BINDING, EMULSION STABILISING, FILM FORMING, LIGHT STABILIZER, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, VISCOSITY CONTROLLING

POLYACRYLATE-45 is a precision polymer engineered to attract and retain significant moisture, forming a sophisticated, gel-like layer on the skin's surface. This advanced film-former not only provides intense, sustained hydration but also acts as a crucial texturizer and stabilizer in formulations.

Summary

Absorbent Emulsion Stabilising Film Forming Skin Conditioning Viscosity Controlling

Science

Mechanism of Action

Functioning as a super-absorbent polymer, POLYACRYLATE-45 (likely Sodium Polyacrylate 45% in water) captures and holds up to 300-1000 times its weight in water. On the skin, its large, cross-linked molecular structure prevents penetration, instead forming a microscopic, hydrating reservoir on the surface. This action effectively reduces transepidermal water loss (TEWL) by creating a protective barrier, thereby enhancing skin hydration, maintaining moisture balance, and improving skin feel. Beyond its direct skin benefits, it acts as a thickener, stabilizer, and film-forming agent, contributing to optimal product texture and emulsion stability.

Research

Clinical Evidence

Medium confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 6 – 8
0 7 14

Stability

An aqueous solution of Sodium Polyacrylate typically maintains stability and effectiveness within a pH range of 6.0 to 8.0. Broader stability has been observed up to pH 10 in certain applications, demonstrating excellent viscosity stability and resistance to thermal aging.

Conflicts

  • strong oxidizing agents

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

Cosmetic-grade Sodium Polyacrylate is deemed safe for sensitive skin and non-toxic, aligning with stringent regulatory standards from bodies like the FDA and EU Cosmetics Regulation. Its large molecular size inherently limits skin irritation. However, stringent manufacturing controls are critical, as residual acrylic acid impurities exceeding 300 PPM (parts per million) can potentially induce skin irritation. The CIR Expert Panel considers related 'Acrylates Copolymers' safe when formulated to prevent irritation, building on FDA safety determinations for similar polymers in medical devices.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

POLYACRYLATE-45 is a valuable, multifunctional ingredient that significantly enhances skin hydration and product stability through its superior water-absorbing and film-forming properties, making it suitable for all skin types.

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