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METHACRYLIC ACID/STYRENE/VP COPOLYMER.

Valuable CAS 27554-92-3 / OPACIFYING

METHACRYLIC ACID/STYRENE/VP COPOLYMER is a sophisticated polymer designed to enhance the textural and aesthetic characteristics of cosmetic formulations. It primarily functions by forming a pliable, continuous film on the skin's surface, imparting a smooth feel and offering potential water-binding capabilities. This multifunctional ingredient also serves to opacify products and increase their viscosity, contributing to desirable product consistency.

Summary

film-forming opacifying viscosity controlling

Science

Mechanism of Action

This copolymer operates by creating a cohesive and non-occlusive film layer upon application to skin or hair. This film provides a smooth tactile sensation and can exhibit water-binding properties, thereby supporting surface-level hydration without being absorbed into the skin due to its large molecular weight. Additionally, its inherent properties allow it to impart opacity or color to formulations and contribute to their overall rheology by increasing viscosity.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

The methacrylic acid component of this copolymer is notably pH-sensitive; it demonstrates solubility at alkaline pH and becomes insoluble, precipitating around pH 4.6, in acidic conditions. Formulators must consider this pH-dependent behavior to ensure product stability and to develop non-irritating formulations.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
36.5%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that METHACRYLIC ACID/STYRENE/VP COPOLYMER is safe for use in cosmetics at concentrations up to 36.5%. Its substantial molecular size prevents percutaneous absorption, limiting its activity to the skin's surface. Minimal concerns for irritation or sensitization are noted when this ingredient is properly formulated.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

METHACRYLIC ACID/STYRENE/VP COPOLYMER is a valuable multifunctional ingredient recognized for its film-forming, opacifying, and viscosity-enhancing properties, maintaining a strong safety profile in cosmetic formulations.

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