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Moumoujus

ISOBUTYLENE/STYRENE COPOLYMER.

Valuable CAS 9011-12-5

ISOBUTYLENE/STYRENE COPOLYMER is a multifunctional polymer utilized in skincare for its primary role as a film former. It contributes to product texture and forms a continuous, protective film on the skin, thereby enhancing moisture retention and supporting the skin's natural barrier functions.

Summary

Film former Opacifying agent Viscosity increasing agent

Science

Mechanism of Action

Upon application, ISOBUTYLENE/STYRENE COPOLYMER creates a continuous, nonpolar film on the skin's surface. This physical barrier can effectively reduce transepidermal water loss, contributing to enhanced hydration and fortifying the skin's protective capabilities against environmental stressors.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

As a nonpolar, flexible polymer with inherent hydrophobicity and low oxygen permeability, this ingredient contributes to formulation stability by offering protection against oxidation and impeding the diffusion of polar water molecules.

Conflicts

  • Related block copolymers (SIBS) have shown susceptibility to stress cracking in the presence of certain organic solvents, suggesting a potential incompatibility to consider for formulation integrity.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that ISOBUTYLENE/STYRENE COPOLYMER is safe under current cosmetic use and concentrations. Due to its large molecular size, percutaneous absorption is not anticipated, and toxicity tests have yielded negative results, indicating a favorable safety profile.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

ISOBUTYLENE/STYRENE COPOLYMER is a valuable multifunctional ingredient, offering significant benefits in film-forming, barrier support, and texture enhancement with a robust safety profile across all skin types.

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