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Moumoujus

BIS-BENZYL PROPANEDIOL/IPDI COPOLYMER.

Valuable / FILM FORMING, HAIR CONDITIONING, HAIR FIXING, NAIL CONDITIONING, SKIN CONDITIONING, SKIN PROTECTING

A high-performance, biodegradable polyurethane film-former designed to provide a sophisticated, breathable barrier on the skin. It is frequently utilized in precision formulations to enhance gloss, stabilize pigments, and improve the wear-time of water-resistant products.

Summary

film forming skin conditioning skin protecting gloss enhancer

Science

Mechanism of Action

This copolymer functions by organizing into a flexible, hydrophobic lattice on the skin's surface, effectively sealing in moisture to prevent transepidermal water loss (TEWL) without occlusive heaviness. Its unique benzyl alcohol end-caps elevate the refractive index of the formula, resulting in a high-clarity gloss, while simultaneously acting as a structural scaffold to keep hydrophobic active ingredients and pigments evenly dispersed.

Research

Clinical Evidence

Medium confidence
Effective range 2–4%
Optimal

3%

Key findings

  1. 01 Technical evaluations of structural analogues (Propanediol/IPDI copolymers) demonstrate superior pigment wetting and enhanced water resistance in both anhydrous and emulsion-based systems.

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
1%
Red flag below
0.5%

Because this is a functional polymer rather than a primary active, it is rarely 'dusted' for marketing claims; however, concentrations below 1% may fail to provide the intended film-forming and barrier-protection benefits.

The Formula

Formulation

Solubility
Oil
Optimal pH 4 – 8
0 7 14

Stability

Maintains excellent structural integrity across broad temperature ranges and is highly resistant to oxidation in O/W and W/O emulsions.

Synergies

  • UV Filters
  • Hydrophobic Pigments
  • Emollients

Conflicts

  • High concentrations of strong electrolytes
  • Strong oxidizing agents

Safety

Safety Profile

CIR Status
Safe as used
Max tested
10%
Pregnancy
Safe
Sensitization risk Low

The high molecular weight of this copolymer prevents systemic absorption, making it biologically inert and safe for topical application.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

An essential structural ingredient for achieving long-wear performance and elegant finish in barrier-focused and sun-protection formulations.

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