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Moumoujus

BUTENE/ISOBUTENE COPOLYMER.

Valuable CAS 9044-17-1 / BINDING, HUMECTANT, VISCOSITY CONTROLLING

A synthetic hydrocarbon polymer that functions as a multi-purpose film-forming agent and emollient in cosmetic formulations. This non-polar copolymer creates a protective, water-resistant barrier on skin while enhancing product texture and stability. Its occlusive properties make it particularly valuable in moisture-retaining and long-wear formulations.

Summary

viscosity controlling emollient film forming binding

Science

Mechanism of Action

Forms a breathable, occlusive film on the skin surface that reduces transepidermal water loss while providing slip and glide. The polymer structure creates a water-resistant barrier that helps maintain skin hydration and improves the sensory properties of formulations through enhanced viscosity control and emulsion stabilization.

Research

Clinical Evidence

High confidence
Effective range 14.34–40%
Optimal

20%

Key findings

  1. 01 Human irritation testing at 20% concentration in lipstick formulations showed zero irritation response on sensitive mucosal tissue
  2. 02 Patent studies demonstrate effective viscosity control and UV filter stabilization at 14.34% in sunscreen gel systems
  3. 03 CIR safety evaluation confirms non-sensitizing properties up to 40% concentration in lip product applications

Transparency

Dusting Analysis

Not commonly dusted

As a functional film-former and viscosity modifier with proven safety data, this ingredient is typically used at appropriate concentrations rather than being added for marketing purposes.

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Exceptionally stable non-ionic polymer with high resistance to oxidation and no pH dependency requirements

Synergies

  • Oil-soluble emollients
  • UV filters
  • Waxes
  • Silicones

Conflicts

  • Highly polar water-based systems without emulsifiers
  • Strong oxidizing agents

Safety

Safety Profile

CIR Status
Safe as used
Max tested
95%
Pregnancy
Safe
Sensitization risk Low

FDA-recognized as indirect food additive for adhesives and coatings. Maximum safety concentration varies by product type: 95% for lipsticks (hydrogenated form), 40% for standard copolymer.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

A well-tolerated, multifunctional polymer that effectively enhances formulation stability and skin barrier protection with excellent safety credentials.

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