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BUTADIENE/ACRYLONITRILE COPOLYMER.

Optional CAS 9003-18-3 / FILM FORMING, VISCOSITY CONTROLLING

A synthetic elastomeric polymer that functions as a specialized film-forming agent in precision skincare formulations. This copolymer creates a continuous hydrophobic barrier on skin surfaces, delivering occlusive moisturization while providing structural integrity to long-wear cosmetic products.

Film forming Viscosity controlling Occlusive moisturizing Barrier protection

Science

Forms a flexible, continuous film on the skin surface that acts as an occlusive barrier, preventing transepidermal water loss while protecting against environmental stressors and chemical irritants. The polymer's elastomeric properties allow it to maintain barrier function while accommodating natural skin movement.


Research

Medium confidence
Effective range N/A
Optimal

1%

Key findings

  1. 01 Demonstrated efficacy as hydrophobic film-former mimicking endogenous lipids, significantly reducing TEWL and enhancing skin hydration metrics

Transparency

Not commonly dusted

Specialized polymer primarily used in technical formulations requiring film-forming properties; not commonly added for marketing appeal


The Formula

Solubility
Oil
Optimal pH 6.5 – 8.5
0 7 14

Stability

Supplied as aqueous latex dispersion requiring protection from temperature extremes to prevent coagulation; maintains stability under standard storage conditions

Conflicts

  • Strong oxidizing agents
  • Strong acids
  • Organic solvents that may compromise polymer film integrity

Safety

CIR Status
Not reviewed
Sensitization risk Low

FDA-approved for indirect food contact applications (21 CFR 177.1020, 177.1030); considered non-hazardous in polymerized state despite lack of specific CIR cosmetic assessment


Your Skin

Yes Normal
Yes Dry
No Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Optional

A technically proficient film-former with demonstrated hydration benefits, best suited for specialized barrier and long-wear formulations rather than routine skincare.


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