Isostearoyl Trimellitic Anhydride/Trimethylolpropane Copolymer

AKA “Isostearoyl Trimellitic Anhydride/Trimethylolpropane Copolymer, Film-Former”

Ingredient

Ingredient Facts

Isostearoyl trimellitic anhydride/trimethylolpropane copolymer

AKA: Film-Former

Ingredient · Film Forming · EWG: 3

Plant-Derived

Occlusive

Not Clean

Isostearoyl Trimellitic Anhydride/Trimethylolpropane Copolymer is a copolymer of trimellitic anhydride and trimethylpropane chain-terminated by isostearic acid

Formula

C135H246O18

Mol. Weight

2157.4

CAS #

1190965-82-2

Form

Liquid

See origin →

Functions

Film Forming

Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.

Viscosity Controlling

Creates smooth texture

Helps control shine

Provides lightweight skin conditioning

Traditional Use

A synthetic polymer developed in the late 20th century for cosmetic use. Created to provide film-forming and conditioning properties in skincare and haircare products.