emollients

C30-45 Alkyldimethylsilyl Polypropylsilsesquioxane

C30-45 Alkyldimethylsilyl Polypropylsilsesquioxane

film formeremollientconditioningviscosity modifier

INCI Name

C30-45 Alkyldimethyl...

Functions

4 Roles

Sustainability

3/10

Category

emollients

What It Does

C30-45 Alkyldimethylsilyl Polypropylsilsesquioxane is a silicone resin wax — a hybrid material combining a polypropylsilsesquioxane (T-resin) backbone with long-chain C30-45 alkyl groups grafted via dimethylsilyl linkages. This unique architecture gives it a waxy, solid consistency at room temperature while imparting exceptional water-repellency, long-wear performance, and a smooth, non-tacky skin feel. Formulators prize it in color cosmetics, lip products, and long-wear foundations for its ability to build structure, enhance transfer resistance, and improve the adhesion and longevity of pigments without the greasiness associated with conventional waxes.

Creates smooth, even coverage
Provides long-lasting hold
Enhances water resistance
Improves product wear time

Technical Properties

Ionic Charge

nonionic

Molecular charge type

Viscosity Effect

thickening

Impact on formula thickness

Foaming Ability

none

Lather generation

Ingredient Compatibility

Works Well With

silicone fluidshydrocarbon oils and waxesester oilspigments and color dispersionsvolatile siliconesnonionic emulsifiers

Avoid Combining

strong acidsstrong baseshighly polar aqueous systems without proper emulsification
Compatibility analysis powered by OpenMix — open-source formulation science

Sustainability Profile

Sustainability Score

3/10

Biodegradability

not readily biodegradable

Source

synthetic

Feedstock

Silicone-based (silicon dioxide-derived) with petroleum-derived long-chain alkyl groups

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